./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.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 deef9b1f63fa90bdeace0bbb769d25578ef53bda95c70ad5e444555427b2b0e2 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 15:08:40,399 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 15:08:40,457 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 15:08:40,464 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 15:08:40,464 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 15:08:40,482 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 15:08:40,483 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 15:08:40,483 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 15:08:40,483 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 15:08:40,483 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 15:08:40,483 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 15:08:40,483 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 15:08:40,483 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 15:08:40,483 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 15:08:40,483 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 15:08:40,483 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 15:08:40,483 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 15:08:40,483 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 15:08:40,483 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 15:08:40,484 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 15:08:40,484 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 15:08:40,484 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 15:08:40,484 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 15:08:40,484 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 15:08:40,484 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 15:08:40,484 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 15:08:40,484 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 15:08:40,484 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 15:08:40,484 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 15:08:40,484 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 15:08:40,484 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 15:08:40,484 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 15:08:40,484 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:08:40,484 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 15:08:40,484 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 15:08:40,484 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 15:08:40,484 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 15:08:40,484 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 15:08:40,485 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 15:08:40,485 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 15:08:40,485 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 15:08:40,485 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 15:08:40,485 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 15:08:40,485 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 -> deef9b1f63fa90bdeace0bbb769d25578ef53bda95c70ad5e444555427b2b0e2 [2025-02-05 15:08:40,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 15:08:40,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 15:08:40,713 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 15:08:40,713 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 15:08:40,713 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 15:08:40,714 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c [2025-02-05 15:08:41,775 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/995f010ec/9c564076b4ee4c86a95c9c40ecbbf3b7/FLAGaeadebae9 [2025-02-05 15:08:42,011 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 15:08:42,015 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c [2025-02-05 15:08:42,026 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/995f010ec/9c564076b4ee4c86a95c9c40ecbbf3b7/FLAGaeadebae9 [2025-02-05 15:08:42,355 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/995f010ec/9c564076b4ee4c86a95c9c40ecbbf3b7 [2025-02-05 15:08:42,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 15:08:42,359 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 15:08:42,360 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 15:08:42,360 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 15:08:42,363 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 15:08:42,363 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:08:42" (1/1) ... [2025-02-05 15:08:42,364 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6af74a35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:42, skipping insertion in model container [2025-02-05 15:08:42,364 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:08:42" (1/1) ... [2025-02-05 15:08:42,373 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 15:08:42,457 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c[490,503] [2025-02-05 15:08:42,469 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:08:42,478 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 15:08:42,484 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c[490,503] [2025-02-05 15:08:42,490 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:08:42,497 INFO L204 MainTranslator]: Completed translation [2025-02-05 15:08:42,497 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:42 WrapperNode [2025-02-05 15:08:42,498 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 15:08:42,498 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 15:08:42,498 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 15:08:42,498 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 15:08:42,502 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:42" (1/1) ... [2025-02-05 15:08:42,506 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:42" (1/1) ... [2025-02-05 15:08:42,518 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 84 [2025-02-05 15:08:42,520 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 15:08:42,521 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 15:08:42,521 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 15:08:42,521 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 15:08:42,528 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:42" (1/1) ... [2025-02-05 15:08:42,529 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:42" (1/1) ... [2025-02-05 15:08:42,530 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:42" (1/1) ... [2025-02-05 15:08:42,541 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-05 15:08:42,541 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:42" (1/1) ... [2025-02-05 15:08:42,542 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:42" (1/1) ... [2025-02-05 15:08:42,546 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:42" (1/1) ... [2025-02-05 15:08:42,546 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:42" (1/1) ... [2025-02-05 15:08:42,547 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:42" (1/1) ... [2025-02-05 15:08:42,547 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:42" (1/1) ... [2025-02-05 15:08:42,548 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 15:08:42,548 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 15:08:42,549 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 15:08:42,549 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 15:08:42,552 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:42" (1/1) ... [2025-02-05 15:08:42,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:08:42,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:42,583 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-05 15:08:42,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-05 15:08:42,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 15:08:42,604 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-02-05 15:08:42,604 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-02-05 15:08:42,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 15:08:42,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 15:08:42,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 15:08:42,604 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-05 15:08:42,604 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-05 15:08:42,648 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 15:08:42,650 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 15:08:42,794 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2025-02-05 15:08:42,794 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 15:08:42,800 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 15:08:42,800 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 15:08:42,800 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:08:42 BoogieIcfgContainer [2025-02-05 15:08:42,800 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 15:08:42,802 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 15:08:42,802 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 15:08:42,805 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 15:08:42,805 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 03:08:42" (1/3) ... [2025-02-05 15:08:42,805 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ca5c262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:08:42, skipping insertion in model container [2025-02-05 15:08:42,805 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:42" (2/3) ... [2025-02-05 15:08:42,805 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ca5c262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:08:42, skipping insertion in model container [2025-02-05 15:08:42,805 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:08:42" (3/3) ... [2025-02-05 15:08:42,806 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound50.c [2025-02-05 15:08:42,815 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 15:08:42,816 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd2-ll_unwindbound50.c that has 3 procedures, 34 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-02-05 15:08:42,843 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 15:08:42,850 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;@e399234, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 15:08:42,850 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 15:08:42,852 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-02-05 15:08:42,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-02-05 15:08:42,856 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:42,856 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:42,856 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:42,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:42,859 INFO L85 PathProgramCache]: Analyzing trace with hash 100709880, now seen corresponding path program 1 times [2025-02-05 15:08:42,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:42,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002595560] [2025-02-05 15:08:42,864 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:42,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:42,915 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-05 15:08:42,927 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-05 15:08:42,927 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:42,928 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 15:08:42,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:42,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002595560] [2025-02-05 15:08:42,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002595560] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:42,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869190978] [2025-02-05 15:08:42,977 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:42,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:42,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:42,981 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:42,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-05 15:08:43,029 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-05 15:08:43,057 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-05 15:08:43,057 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:43,057 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:43,059 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-02-05 15:08:43,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:43,072 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 15:08:43,073 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 15:08:43,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869190978] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:08:43,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:08:43,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-02-05 15:08:43,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269599698] [2025-02-05 15:08:43,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:08:43,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-05 15:08:43,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:43,092 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-05 15:08:43,093 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-05 15:08:43,094 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 15:08:43,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:43,109 INFO L93 Difference]: Finished difference Result 65 states and 104 transitions. [2025-02-05 15:08:43,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-05 15:08:43,111 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2025-02-05 15:08:43,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:43,115 INFO L225 Difference]: With dead ends: 65 [2025-02-05 15:08:43,115 INFO L226 Difference]: Without dead ends: 30 [2025-02-05 15:08:43,117 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-05 15:08:43,120 INFO L435 NwaCegarLoop]: 45 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, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:43,121 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:08:43,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-02-05 15:08:43,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2025-02-05 15:08:43,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-02-05 15:08:43,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2025-02-05 15:08:43,144 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 28 [2025-02-05 15:08:43,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:43,145 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2025-02-05 15:08:43,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 15:08:43,145 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2025-02-05 15:08:43,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-02-05 15:08:43,146 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:43,146 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:43,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-05 15:08:43,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-02-05 15:08:43,350 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:43,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:43,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1726789354, now seen corresponding path program 1 times [2025-02-05 15:08:43,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:43,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644641638] [2025-02-05 15:08:43,351 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:43,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:43,358 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-05 15:08:43,368 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-05 15:08:43,368 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:43,368 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-05 15:08:43,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:43,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644641638] [2025-02-05 15:08:43,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644641638] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:08:43,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:08:43,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-05 15:08:43,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748454772] [2025-02-05 15:08:43,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:08:43,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-05 15:08:43,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:43,442 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-05 15:08:43,442 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-05 15:08:43,442 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 15:08:43,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:43,462 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2025-02-05 15:08:43,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-05 15:08:43,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2025-02-05 15:08:43,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:43,467 INFO L225 Difference]: With dead ends: 40 [2025-02-05 15:08:43,467 INFO L226 Difference]: Without dead ends: 32 [2025-02-05 15:08:43,467 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-05 15:08:43,468 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:43,468 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:08:43,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-02-05 15:08:43,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2025-02-05 15:08:43,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-02-05 15:08:43,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2025-02-05 15:08:43,477 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 29 [2025-02-05 15:08:43,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:43,481 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2025-02-05 15:08:43,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 15:08:43,482 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2025-02-05 15:08:43,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-02-05 15:08:43,482 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:43,482 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:43,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-05 15:08:43,482 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:43,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:43,483 INFO L85 PathProgramCache]: Analyzing trace with hash -2044305484, now seen corresponding path program 1 times [2025-02-05 15:08:43,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:43,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284419214] [2025-02-05 15:08:43,483 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:43,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:43,495 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-05 15:08:43,511 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-05 15:08:43,512 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:43,512 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:43,655 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 15:08:43,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:43,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284419214] [2025-02-05 15:08:43,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284419214] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:43,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94709989] [2025-02-05 15:08:43,655 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:43,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:43,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:43,657 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:43,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-05 15:08:43,681 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-05 15:08:43,693 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-05 15:08:43,693 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:43,693 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:43,693 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-05 15:08:43,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:43,837 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-05 15:08:43,837 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 15:08:43,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94709989] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:08:43,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:08:43,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2025-02-05 15:08:43,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256702977] [2025-02-05 15:08:43,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:08:43,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-05 15:08:43,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:43,839 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-05 15:08:43,839 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-02-05 15:08:43,839 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 15:08:43,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:43,932 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2025-02-05 15:08:43,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 15:08:43,933 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2025-02-05 15:08:43,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:43,934 INFO L225 Difference]: With dead ends: 49 [2025-02-05 15:08:43,934 INFO L226 Difference]: Without dead ends: 47 [2025-02-05 15:08:43,934 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2025-02-05 15:08:43,935 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:43,935 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 146 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:08:43,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2025-02-05 15:08:43,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2025-02-05 15:08:43,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 28 states have internal predecessors, (34), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-02-05 15:08:43,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 63 transitions. [2025-02-05 15:08:43,941 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 63 transitions. Word has length 30 [2025-02-05 15:08:43,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:43,941 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 63 transitions. [2025-02-05 15:08:43,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 15:08:43,941 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2025-02-05 15:08:43,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-02-05 15:08:43,942 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:43,942 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:43,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-05 15:08:44,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:44,146 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:44,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:44,147 INFO L85 PathProgramCache]: Analyzing trace with hash -886820372, now seen corresponding path program 1 times [2025-02-05 15:08:44,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:44,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593572273] [2025-02-05 15:08:44,148 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:44,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:44,155 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-05 15:08:44,170 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-05 15:08:44,170 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:44,170 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:44,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1989904455] [2025-02-05 15:08:44,171 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:44,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:44,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:44,177 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:44,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-05 15:08:44,201 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-05 15:08:44,213 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-05 15:08:44,213 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:44,213 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:44,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-05 15:08:44,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-05 15:08:44,242 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 15:08:44,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:44,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593572273] [2025-02-05 15:08:44,242 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:08:44,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989904455] [2025-02-05 15:08:44,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989904455] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:08:44,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:08:44,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:08:44,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145979768] [2025-02-05 15:08:44,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:08:44,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:08:44,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:44,244 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:08:44,244 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:08:44,244 INFO L87 Difference]: Start difference. First operand 45 states and 63 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 15:08:44,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:44,279 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2025-02-05 15:08:44,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:08:44,280 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2025-02-05 15:08:44,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:44,281 INFO L225 Difference]: With dead ends: 66 [2025-02-05 15:08:44,281 INFO L226 Difference]: Without dead ends: 64 [2025-02-05 15:08:44,282 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-05 15:08:44,282 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:44,282 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 139 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:08:44,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-02-05 15:08:44,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2025-02-05 15:08:44,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.303030303030303) internal successors, (43), 37 states have internal predecessors, (43), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2025-02-05 15:08:44,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 76 transitions. [2025-02-05 15:08:44,299 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 76 transitions. Word has length 32 [2025-02-05 15:08:44,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:44,299 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 76 transitions. [2025-02-05 15:08:44,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 15:08:44,299 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 76 transitions. [2025-02-05 15:08:44,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-02-05 15:08:44,299 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:44,299 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:44,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-05 15:08:44,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:44,500 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:44,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:44,502 INFO L85 PathProgramCache]: Analyzing trace with hash -276176331, now seen corresponding path program 1 times [2025-02-05 15:08:44,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:44,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584093965] [2025-02-05 15:08:44,504 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:44,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:44,513 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-02-05 15:08:44,525 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-02-05 15:08:44,528 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:44,528 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:44,608 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 15:08:44,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:44,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584093965] [2025-02-05 15:08:44,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584093965] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:44,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587107710] [2025-02-05 15:08:44,609 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:44,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:44,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:44,615 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:44,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-05 15:08:44,642 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-02-05 15:08:44,653 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-02-05 15:08:44,653 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:44,654 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:44,654 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-05 15:08:44,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:44,732 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-05 15:08:44,733 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 15:08:44,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587107710] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:08:44,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:08:44,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2025-02-05 15:08:44,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563291688] [2025-02-05 15:08:44,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:08:44,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:08:44,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:44,734 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:08:44,734 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2025-02-05 15:08:44,734 INFO L87 Difference]: Start difference. First operand 55 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-05 15:08:44,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:44,788 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2025-02-05 15:08:44,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:08:44,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2025-02-05 15:08:44,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:44,789 INFO L225 Difference]: With dead ends: 63 [2025-02-05 15:08:44,789 INFO L226 Difference]: Without dead ends: 59 [2025-02-05 15:08:44,790 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2025-02-05 15:08:44,790 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:44,790 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 142 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:08:44,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-02-05 15:08:44,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2025-02-05 15:08:44,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.25) internal successors, (45), 39 states have internal predecessors, (45), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2025-02-05 15:08:44,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2025-02-05 15:08:44,803 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 35 [2025-02-05 15:08:44,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:44,805 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2025-02-05 15:08:44,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-05 15:08:44,805 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2025-02-05 15:08:44,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-02-05 15:08:44,806 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:44,806 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:44,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-05 15:08:45,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:45,008 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:45,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:45,009 INFO L85 PathProgramCache]: Analyzing trace with hash -247836027, now seen corresponding path program 1 times [2025-02-05 15:08:45,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:45,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369979026] [2025-02-05 15:08:45,010 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:45,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:45,018 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-02-05 15:08:45,025 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-02-05 15:08:45,029 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:45,030 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:45,077 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-05 15:08:45,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:45,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369979026] [2025-02-05 15:08:45,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369979026] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:08:45,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:08:45,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:08:45,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420330564] [2025-02-05 15:08:45,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:08:45,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:08:45,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:45,079 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:08:45,079 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:08:45,079 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 15:08:45,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:45,099 INFO L93 Difference]: Finished difference Result 84 states and 111 transitions. [2025-02-05 15:08:45,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:08:45,099 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2025-02-05 15:08:45,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:45,100 INFO L225 Difference]: With dead ends: 84 [2025-02-05 15:08:45,100 INFO L226 Difference]: Without dead ends: 58 [2025-02-05 15:08:45,100 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:08:45,101 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:45,101 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 100 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:08:45,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-02-05 15:08:45,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2025-02-05 15:08:45,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 39 states have internal predecessors, (44), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2025-02-05 15:08:45,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2025-02-05 15:08:45,107 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 35 [2025-02-05 15:08:45,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:45,107 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2025-02-05 15:08:45,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 15:08:45,107 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2025-02-05 15:08:45,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-02-05 15:08:45,108 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:45,108 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:45,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-05 15:08:45,108 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:45,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:45,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1535941731, now seen corresponding path program 1 times [2025-02-05 15:08:45,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:45,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949625066] [2025-02-05 15:08:45,109 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:45,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:45,112 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-02-05 15:08:45,124 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-02-05 15:08:45,125 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:45,125 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:45,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961702556] [2025-02-05 15:08:45,126 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:45,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:45,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:45,131 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:45,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-05 15:08:45,161 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-02-05 15:08:45,176 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-02-05 15:08:45,176 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:45,176 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:45,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-05 15:08:45,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:45,289 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-05 15:08:45,290 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 15:08:45,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:45,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949625066] [2025-02-05 15:08:45,290 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:08:45,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961702556] [2025-02-05 15:08:45,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961702556] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:08:45,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:08:45,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:08:45,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953822492] [2025-02-05 15:08:45,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:08:45,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:08:45,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:45,291 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:08:45,291 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:08:45,292 INFO L87 Difference]: Start difference. First operand 58 states and 75 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-05 15:08:45,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:45,331 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2025-02-05 15:08:45,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:08:45,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2025-02-05 15:08:45,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:45,332 INFO L225 Difference]: With dead ends: 65 [2025-02-05 15:08:45,332 INFO L226 Difference]: Without dead ends: 63 [2025-02-05 15:08:45,333 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-05 15:08:45,333 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:45,333 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 130 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:08:45,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2025-02-05 15:08:45,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2025-02-05 15:08:45,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.205128205128205) internal successors, (47), 42 states have internal predecessors, (47), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2025-02-05 15:08:45,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2025-02-05 15:08:45,340 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 47 [2025-02-05 15:08:45,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:45,340 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2025-02-05 15:08:45,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-05 15:08:45,340 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2025-02-05 15:08:45,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-02-05 15:08:45,341 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:45,341 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:45,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-05 15:08:45,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:45,542 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:45,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:45,542 INFO L85 PathProgramCache]: Analyzing trace with hash 101798249, now seen corresponding path program 1 times [2025-02-05 15:08:45,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:45,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975158282] [2025-02-05 15:08:45,543 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:45,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:45,547 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-02-05 15:08:45,555 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-02-05 15:08:45,555 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:45,555 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:45,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024343384] [2025-02-05 15:08:45,556 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:45,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:45,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:45,559 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:45,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-05 15:08:45,583 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-02-05 15:08:45,611 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-02-05 15:08:45,611 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:45,611 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:45,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-05 15:08:45,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-02-05 15:08:45,665 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:45,737 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-02-05 15:08:45,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:45,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975158282] [2025-02-05 15:08:45,738 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:08:45,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024343384] [2025-02-05 15:08:45,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024343384] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:08:45,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:08:45,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2025-02-05 15:08:45,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564146569] [2025-02-05 15:08:45,738 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:45,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 15:08:45,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:45,739 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 15:08:45,739 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-02-05 15:08:45,739 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-02-05 15:08:45,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:45,806 INFO L93 Difference]: Finished difference Result 92 states and 127 transitions. [2025-02-05 15:08:45,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-05 15:08:45,806 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 55 [2025-02-05 15:08:45,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:45,807 INFO L225 Difference]: With dead ends: 92 [2025-02-05 15:08:45,807 INFO L226 Difference]: Without dead ends: 90 [2025-02-05 15:08:45,807 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 100 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-02-05 15:08:45,808 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 9 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:45,808 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 219 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:08:45,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2025-02-05 15:08:45,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2025-02-05 15:08:45,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 38 states have internal predecessors, (44), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-02-05 15:08:45,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2025-02-05 15:08:45,824 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 55 [2025-02-05 15:08:45,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:45,824 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2025-02-05 15:08:45,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-02-05 15:08:45,824 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2025-02-05 15:08:45,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-02-05 15:08:45,825 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:45,825 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:45,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-05 15:08:46,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-02-05 15:08:46,028 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:46,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:46,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1244697335, now seen corresponding path program 1 times [2025-02-05 15:08:46,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:46,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537221962] [2025-02-05 15:08:46,028 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:46,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:46,036 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-02-05 15:08:46,041 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-02-05 15:08:46,041 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:46,041 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:46,126 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-02-05 15:08:46,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:46,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537221962] [2025-02-05 15:08:46,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537221962] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:46,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162467245] [2025-02-05 15:08:46,126 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:46,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:46,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:46,128 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:46,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-05 15:08:46,152 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-02-05 15:08:46,166 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-02-05 15:08:46,166 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:46,166 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:46,167 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-05 15:08:46,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:46,218 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-02-05 15:08:46,218 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-02-05 15:08:46,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162467245] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:08:46,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:08:46,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2025-02-05 15:08:46,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502465609] [2025-02-05 15:08:46,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:46,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-05 15:08:46,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:46,282 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-05 15:08:46,282 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-02-05 15:08:46,283 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2025-02-05 15:08:46,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:46,424 INFO L93 Difference]: Finished difference Result 211 states and 250 transitions. [2025-02-05 15:08:46,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-05 15:08:46,425 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 56 [2025-02-05 15:08:46,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:46,426 INFO L225 Difference]: With dead ends: 211 [2025-02-05 15:08:46,426 INFO L226 Difference]: Without dead ends: 203 [2025-02-05 15:08:46,426 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2025-02-05 15:08:46,427 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 81 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:46,427 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 194 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:08:46,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2025-02-05 15:08:46,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 195. [2025-02-05 15:08:46,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 125 states have (on average 1.192) internal successors, (149), 129 states have internal predecessors, (149), 44 states have call successors, (44), 25 states have call predecessors, (44), 25 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2025-02-05 15:08:46,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 233 transitions. [2025-02-05 15:08:46,457 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 233 transitions. Word has length 56 [2025-02-05 15:08:46,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:46,457 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 233 transitions. [2025-02-05 15:08:46,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2025-02-05 15:08:46,457 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 233 transitions. [2025-02-05 15:08:46,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-02-05 15:08:46,459 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:46,459 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:46,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-05 15:08:46,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:46,660 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:46,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:46,660 INFO L85 PathProgramCache]: Analyzing trace with hash 15645217, now seen corresponding path program 1 times [2025-02-05 15:08:46,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:46,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871853089] [2025-02-05 15:08:46,660 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:46,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:46,665 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-02-05 15:08:46,670 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-02-05 15:08:46,671 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:46,671 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:46,768 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-02-05 15:08:46,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:46,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871853089] [2025-02-05 15:08:46,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871853089] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:46,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298602525] [2025-02-05 15:08:46,769 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:46,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:46,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:46,770 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:46,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-05 15:08:46,796 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-02-05 15:08:46,812 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-02-05 15:08:46,812 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:46,812 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:46,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-05 15:08:46,814 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-02-05 15:08:46,841 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:46,915 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-02-05 15:08:46,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298602525] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:08:46,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:08:46,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2025-02-05 15:08:46,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761697573] [2025-02-05 15:08:46,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:46,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-05 15:08:46,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:46,917 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-05 15:08:46,917 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-02-05 15:08:46,918 INFO L87 Difference]: Start difference. First operand 195 states and 233 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2025-02-05 15:08:47,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:47,083 INFO L93 Difference]: Finished difference Result 279 states and 364 transitions. [2025-02-05 15:08:47,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 15:08:47,084 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 57 [2025-02-05 15:08:47,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:47,086 INFO L225 Difference]: With dead ends: 279 [2025-02-05 15:08:47,086 INFO L226 Difference]: Without dead ends: 259 [2025-02-05 15:08:47,086 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2025-02-05 15:08:47,087 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 60 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:47,087 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 249 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:08:47,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2025-02-05 15:08:47,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2025-02-05 15:08:47,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 152 states have (on average 1.2236842105263157) internal successors, (186), 155 states have internal predecessors, (186), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2025-02-05 15:08:47,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 299 transitions. [2025-02-05 15:08:47,135 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 299 transitions. Word has length 57 [2025-02-05 15:08:47,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:47,135 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 299 transitions. [2025-02-05 15:08:47,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2025-02-05 15:08:47,135 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 299 transitions. [2025-02-05 15:08:47,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-02-05 15:08:47,137 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:47,137 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:47,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-05 15:08:47,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:47,341 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:47,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:47,342 INFO L85 PathProgramCache]: Analyzing trace with hash -351822558, now seen corresponding path program 1 times [2025-02-05 15:08:47,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:47,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288998305] [2025-02-05 15:08:47,342 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:47,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:47,347 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-02-05 15:08:47,356 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-02-05 15:08:47,356 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:47,356 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-02-05 15:08:47,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:47,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288998305] [2025-02-05 15:08:47,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288998305] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:47,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545621441] [2025-02-05 15:08:47,426 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:47,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:47,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:47,429 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:47,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-05 15:08:47,459 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-02-05 15:08:47,474 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-02-05 15:08:47,474 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:47,474 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:47,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-05 15:08:47,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-02-05 15:08:47,533 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:47,603 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-02-05 15:08:47,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545621441] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:08:47,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:08:47,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2025-02-05 15:08:47,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119460110] [2025-02-05 15:08:47,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:47,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-05 15:08:47,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:47,605 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-05 15:08:47,605 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-02-05 15:08:47,606 INFO L87 Difference]: Start difference. First operand 235 states and 299 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2025-02-05 15:08:47,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:47,738 INFO L93 Difference]: Finished difference Result 344 states and 448 transitions. [2025-02-05 15:08:47,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-05 15:08:47,738 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 59 [2025-02-05 15:08:47,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:47,741 INFO L225 Difference]: With dead ends: 344 [2025-02-05 15:08:47,742 INFO L226 Difference]: Without dead ends: 248 [2025-02-05 15:08:47,743 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2025-02-05 15:08:47,745 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 68 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:47,745 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 179 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:08:47,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2025-02-05 15:08:47,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2025-02-05 15:08:47,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 161 states have (on average 1.173913043478261) internal successors, (189), 164 states have internal predecessors, (189), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2025-02-05 15:08:47,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 302 transitions. [2025-02-05 15:08:47,782 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 302 transitions. Word has length 59 [2025-02-05 15:08:47,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:47,782 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 302 transitions. [2025-02-05 15:08:47,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2025-02-05 15:08:47,783 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 302 transitions. [2025-02-05 15:08:47,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-02-05 15:08:47,784 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:47,784 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:47,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-05 15:08:47,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:47,985 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:47,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:47,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1287548176, now seen corresponding path program 1 times [2025-02-05 15:08:47,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:47,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88514070] [2025-02-05 15:08:47,986 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:47,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:47,991 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-02-05 15:08:48,006 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-02-05 15:08:48,006 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:48,006 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:48,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1914363815] [2025-02-05 15:08:48,007 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:48,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:48,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:48,010 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:48,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-05 15:08:48,035 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-02-05 15:08:48,052 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-02-05 15:08:48,053 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:48,053 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:48,053 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-05 15:08:48,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:48,169 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-02-05 15:08:48,169 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:48,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:48,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88514070] [2025-02-05 15:08:48,197 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:08:48,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914363815] [2025-02-05 15:08:48,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914363815] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:48,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:08:48,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2025-02-05 15:08:48,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982140373] [2025-02-05 15:08:48,197 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:48,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-05 15:08:48,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:48,198 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-05 15:08:48,198 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-02-05 15:08:48,198 INFO L87 Difference]: Start difference. First operand 244 states and 302 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2025-02-05 15:08:48,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:48,306 INFO L93 Difference]: Finished difference Result 283 states and 355 transitions. [2025-02-05 15:08:48,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 15:08:48,306 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2025-02-05 15:08:48,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:48,308 INFO L225 Difference]: With dead ends: 283 [2025-02-05 15:08:48,308 INFO L226 Difference]: Without dead ends: 278 [2025-02-05 15:08:48,308 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-05 15:08:48,309 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 10 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:48,309 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 213 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:08:48,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2025-02-05 15:08:48,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 276. [2025-02-05 15:08:48,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 183 states have (on average 1.185792349726776) internal successors, (217), 187 states have internal predecessors, (217), 65 states have call successors, (65), 27 states have call predecessors, (65), 27 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2025-02-05 15:08:48,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 343 transitions. [2025-02-05 15:08:48,337 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 343 transitions. Word has length 64 [2025-02-05 15:08:48,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:48,338 INFO L471 AbstractCegarLoop]: Abstraction has 276 states and 343 transitions. [2025-02-05 15:08:48,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2025-02-05 15:08:48,338 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 343 transitions. [2025-02-05 15:08:48,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-02-05 15:08:48,338 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:48,338 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:48,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-05 15:08:48,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-05 15:08:48,543 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:48,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:48,543 INFO L85 PathProgramCache]: Analyzing trace with hash 691051449, now seen corresponding path program 2 times [2025-02-05 15:08:48,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:48,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622519358] [2025-02-05 15:08:48,544 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:08:48,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:48,548 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 69 statements into 2 equivalence classes. [2025-02-05 15:08:48,556 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 69 of 69 statements. [2025-02-05 15:08:48,556 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:08:48,556 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:48,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1804444484] [2025-02-05 15:08:48,557 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:08:48,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:48,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:48,558 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:48,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-05 15:08:48,585 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 69 statements into 2 equivalence classes. [2025-02-05 15:08:48,602 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 69 of 69 statements. [2025-02-05 15:08:48,602 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:08:48,602 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:48,603 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-05 15:08:48,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:48,740 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-02-05 15:08:48,740 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:48,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:48,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622519358] [2025-02-05 15:08:48,801 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:08:48,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804444484] [2025-02-05 15:08:48,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804444484] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:48,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:08:48,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2025-02-05 15:08:48,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418081968] [2025-02-05 15:08:48,801 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:48,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 15:08:48,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:48,802 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 15:08:48,802 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-02-05 15:08:48,802 INFO L87 Difference]: Start difference. First operand 276 states and 343 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2025-02-05 15:08:48,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:48,903 INFO L93 Difference]: Finished difference Result 291 states and 357 transitions. [2025-02-05 15:08:48,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-05 15:08:48,903 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 69 [2025-02-05 15:08:48,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:48,904 INFO L225 Difference]: With dead ends: 291 [2025-02-05 15:08:48,904 INFO L226 Difference]: Without dead ends: 289 [2025-02-05 15:08:48,905 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2025-02-05 15:08:48,905 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 16 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:48,905 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 228 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:08:48,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2025-02-05 15:08:48,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 288. [2025-02-05 15:08:48,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 192 states have (on average 1.1770833333333333) internal successors, (226), 196 states have internal predecessors, (226), 65 states have call successors, (65), 30 states have call predecessors, (65), 30 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2025-02-05 15:08:48,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 352 transitions. [2025-02-05 15:08:48,946 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 352 transitions. Word has length 69 [2025-02-05 15:08:48,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:48,946 INFO L471 AbstractCegarLoop]: Abstraction has 288 states and 352 transitions. [2025-02-05 15:08:48,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2025-02-05 15:08:48,947 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 352 transitions. [2025-02-05 15:08:48,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2025-02-05 15:08:48,947 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:48,947 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:48,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-05 15:08:49,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-02-05 15:08:49,151 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:49,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:49,152 INFO L85 PathProgramCache]: Analyzing trace with hash 239571152, now seen corresponding path program 3 times [2025-02-05 15:08:49,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:49,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788677258] [2025-02-05 15:08:49,152 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:08:49,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:49,160 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 74 statements into 5 equivalence classes. [2025-02-05 15:08:49,188 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 74 of 74 statements. [2025-02-05 15:08:49,188 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-05 15:08:49,188 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:49,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16692996] [2025-02-05 15:08:49,192 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:08:49,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:49,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:49,194 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:49,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-05 15:08:49,240 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 74 statements into 5 equivalence classes. [2025-02-05 15:08:49,266 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 54 of 74 statements. [2025-02-05 15:08:49,266 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 15:08:49,266 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:49,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-02-05 15:08:49,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2025-02-05 15:08:49,570 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:49,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:49,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788677258] [2025-02-05 15:08:49,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:08:49,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16692996] [2025-02-05 15:08:49,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16692996] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:49,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:08:49,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2025-02-05 15:08:49,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757471470] [2025-02-05 15:08:49,761 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:49,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 15:08:49,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:49,762 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 15:08:49,762 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2025-02-05 15:08:49,762 INFO L87 Difference]: Start difference. First operand 288 states and 352 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2025-02-05 15:08:49,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:49,955 INFO L93 Difference]: Finished difference Result 303 states and 366 transitions. [2025-02-05 15:08:49,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-05 15:08:49,956 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 74 [2025-02-05 15:08:49,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:49,957 INFO L225 Difference]: With dead ends: 303 [2025-02-05 15:08:49,957 INFO L226 Difference]: Without dead ends: 299 [2025-02-05 15:08:49,957 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2025-02-05 15:08:49,958 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 26 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:49,958 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 281 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:08:49,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2025-02-05 15:08:49,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 298. [2025-02-05 15:08:49,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 200 states have (on average 1.165) internal successors, (233), 203 states have internal predecessors, (233), 65 states have call successors, (65), 33 states have call predecessors, (65), 32 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2025-02-05 15:08:49,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 359 transitions. [2025-02-05 15:08:49,996 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 359 transitions. Word has length 74 [2025-02-05 15:08:49,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:49,996 INFO L471 AbstractCegarLoop]: Abstraction has 298 states and 359 transitions. [2025-02-05 15:08:49,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2025-02-05 15:08:49,996 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 359 transitions. [2025-02-05 15:08:49,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2025-02-05 15:08:49,997 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:49,997 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:50,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-05 15:08:50,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:50,201 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:50,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:50,202 INFO L85 PathProgramCache]: Analyzing trace with hash 852496708, now seen corresponding path program 1 times [2025-02-05 15:08:50,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:50,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311539525] [2025-02-05 15:08:50,202 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:50,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:50,205 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 80 statements into 1 equivalence classes. [2025-02-05 15:08:50,212 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 80 of 80 statements. [2025-02-05 15:08:50,212 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:50,212 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:50,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1394153619] [2025-02-05 15:08:50,213 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:50,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:50,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:50,215 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:50,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-05 15:08:50,242 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 80 statements into 1 equivalence classes. [2025-02-05 15:08:50,261 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 80 of 80 statements. [2025-02-05 15:08:50,262 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:50,262 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:50,265 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-02-05 15:08:50,267 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:50,664 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2025-02-05 15:08:50,664 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2025-02-05 15:08:51,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:51,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311539525] [2025-02-05 15:08:51,015 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:08:51,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394153619] [2025-02-05 15:08:51,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394153619] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:08:51,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:08:51,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2025-02-05 15:08:51,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419101597] [2025-02-05 15:08:51,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:51,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-05 15:08:51,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:51,017 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-05 15:08:51,018 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2025-02-05 15:08:51,018 INFO L87 Difference]: Start difference. First operand 298 states and 359 transitions. Second operand has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2025-02-05 15:08:53,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:53,237 INFO L93 Difference]: Finished difference Result 435 states and 581 transitions. [2025-02-05 15:08:53,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-02-05 15:08:53,238 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 80 [2025-02-05 15:08:53,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:53,240 INFO L225 Difference]: With dead ends: 435 [2025-02-05 15:08:53,241 INFO L226 Difference]: Without dead ends: 428 [2025-02-05 15:08:53,241 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2025-02-05 15:08:53,242 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 134 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:53,242 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 761 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2025-02-05 15:08:53,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2025-02-05 15:08:53,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 391. [2025-02-05 15:08:53,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 256 states have (on average 1.23046875) internal successors, (315), 259 states have internal predecessors, (315), 100 states have call successors, (100), 34 states have call predecessors, (100), 34 states have return successors, (98), 97 states have call predecessors, (98), 98 states have call successors, (98) [2025-02-05 15:08:53,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 513 transitions. [2025-02-05 15:08:53,339 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 513 transitions. Word has length 80 [2025-02-05 15:08:53,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:53,339 INFO L471 AbstractCegarLoop]: Abstraction has 391 states and 513 transitions. [2025-02-05 15:08:53,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2025-02-05 15:08:53,339 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 513 transitions. [2025-02-05 15:08:53,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2025-02-05 15:08:53,343 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:53,344 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:53,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-02-05 15:08:53,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:53,544 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:53,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:53,545 INFO L85 PathProgramCache]: Analyzing trace with hash 2042434077, now seen corresponding path program 4 times [2025-02-05 15:08:53,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:53,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545709838] [2025-02-05 15:08:53,545 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:08:53,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:53,550 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 91 statements into 2 equivalence classes. [2025-02-05 15:08:53,554 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 81 of 91 statements. [2025-02-05 15:08:53,554 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:08:53,554 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:53,624 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2025-02-05 15:08:53,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:53,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545709838] [2025-02-05 15:08:53,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545709838] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:08:53,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:08:53,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:08:53,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982207248] [2025-02-05 15:08:53,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:08:53,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:08:53,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:53,626 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:08:53,626 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:08:53,626 INFO L87 Difference]: Start difference. First operand 391 states and 513 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2025-02-05 15:08:53,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:53,725 INFO L93 Difference]: Finished difference Result 587 states and 831 transitions. [2025-02-05 15:08:53,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 15:08:53,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 91 [2025-02-05 15:08:53,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:53,732 INFO L225 Difference]: With dead ends: 587 [2025-02-05 15:08:53,732 INFO L226 Difference]: Without dead ends: 462 [2025-02-05 15:08:53,733 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-02-05 15:08:53,733 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 12 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:53,734 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 186 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:08:53,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2025-02-05 15:08:53,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 410. [2025-02-05 15:08:53,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 267 states have (on average 1.2397003745318351) internal successors, (331), 270 states have internal predecessors, (331), 108 states have call successors, (108), 34 states have call predecessors, (108), 34 states have return successors, (106), 105 states have call predecessors, (106), 106 states have call successors, (106) [2025-02-05 15:08:53,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 545 transitions. [2025-02-05 15:08:53,810 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 545 transitions. Word has length 91 [2025-02-05 15:08:53,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:53,810 INFO L471 AbstractCegarLoop]: Abstraction has 410 states and 545 transitions. [2025-02-05 15:08:53,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2025-02-05 15:08:53,810 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 545 transitions. [2025-02-05 15:08:53,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2025-02-05 15:08:53,812 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:53,813 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:53,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-02-05 15:08:53,813 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:53,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:53,813 INFO L85 PathProgramCache]: Analyzing trace with hash 777061389, now seen corresponding path program 1 times [2025-02-05 15:08:53,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:53,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597377327] [2025-02-05 15:08:53,813 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:53,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:53,819 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 97 statements into 1 equivalence classes. [2025-02-05 15:08:53,842 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 97 of 97 statements. [2025-02-05 15:08:53,842 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:53,842 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:53,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512331326] [2025-02-05 15:08:53,843 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:53,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:53,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:53,844 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:53,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-05 15:08:53,877 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 97 statements into 1 equivalence classes. [2025-02-05 15:08:53,898 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 97 of 97 statements. [2025-02-05 15:08:53,898 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:53,898 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:53,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-02-05 15:08:53,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 68 proven. 39 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2025-02-05 15:08:54,845 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:09:35,237 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 68 proven. 30 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2025-02-05 15:09:35,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:09:35,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597377327] [2025-02-05 15:09:35,238 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:09:35,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512331326] [2025-02-05 15:09:35,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512331326] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:09:35,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:09:35,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2025-02-05 15:09:35,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241646025] [2025-02-05 15:09:35,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:09:35,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-05 15:09:35,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:09:35,240 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-05 15:09:35,240 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=538, Unknown=1, NotChecked=0, Total=650 [2025-02-05 15:09:35,241 INFO L87 Difference]: Start difference. First operand 410 states and 545 transitions. Second operand has 26 states, 25 states have (on average 2.12) internal successors, (53), 21 states have internal predecessors, (53), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 13 states have call predecessors, (30), 10 states have call successors, (30) [2025-02-05 15:09:42,949 WARN L286 SmtUtils]: Spent 7.03s on a formula simplification. DAG size of input: 76 DAG size of output: 75 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-02-05 15:09:48,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-05 15:10:04,915 WARN L286 SmtUtils]: Spent 8.16s on a formula simplification. DAG size of input: 64 DAG size of output: 63 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-02-05 15:10:08,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-05 15:10:19,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-05 15:10:23,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []