./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound100.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/prodbin-ll_unwindbound100.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d87fab1dc6e9b3b1ef38291e10411689fc961abba4e105f2586cc8da9615d8a6 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 15:26:34,701 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 15:26:34,765 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 15:26:34,768 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 15:26:34,769 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 15:26:34,782 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 15:26:34,783 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 15:26:34,783 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 15:26:34,784 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 15:26:34,784 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 15:26:34,785 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 15:26:34,785 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 15:26:34,785 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 15:26:34,785 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 15:26:34,786 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 15:26:34,786 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 15:26:34,786 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 15:26:34,786 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 15:26:34,786 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 15:26:34,786 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 15:26:34,786 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 15:26:34,786 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 15:26:34,787 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 15:26:34,787 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 15:26:34,787 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 15:26:34,787 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 15:26:34,787 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 15:26:34,787 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 15:26:34,787 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 15:26:34,787 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 15:26:34,787 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 15:26:34,787 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 15:26:34,787 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:26:34,788 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 15:26:34,788 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 15:26:34,788 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 15:26:34,788 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 15:26:34,788 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 15:26:34,788 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 15:26:34,788 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 15:26:34,788 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 15:26:34,789 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 15:26:34,789 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 15:26:34,789 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 -> d87fab1dc6e9b3b1ef38291e10411689fc961abba4e105f2586cc8da9615d8a6 [2025-02-05 15:26:35,023 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 15:26:35,031 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 15:26:35,033 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 15:26:35,033 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 15:26:35,034 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 15:26:35,034 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2025-02-05 15:26:36,151 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/3363165d0/b89d93d880314d6389d5cc881a5f596c/FLAG1daab85cf [2025-02-05 15:26:36,392 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 15:26:36,393 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2025-02-05 15:26:36,404 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/3363165d0/b89d93d880314d6389d5cc881a5f596c/FLAG1daab85cf [2025-02-05 15:26:36,416 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/3363165d0/b89d93d880314d6389d5cc881a5f596c [2025-02-05 15:26:36,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 15:26:36,423 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 15:26:36,424 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 15:26:36,424 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 15:26:36,427 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 15:26:36,428 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:26:36" (1/1) ... [2025-02-05 15:26:36,430 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48cdd8dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:26:36, skipping insertion in model container [2025-02-05 15:26:36,431 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:26:36" (1/1) ... [2025-02-05 15:26:36,443 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 15:26:36,544 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/prodbin-ll_unwindbound100.c[1263,1276] [2025-02-05 15:26:36,556 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:26:36,562 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 15:26:36,569 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/prodbin-ll_unwindbound100.c[1263,1276] [2025-02-05 15:26:36,573 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:26:36,584 INFO L204 MainTranslator]: Completed translation [2025-02-05 15:26:36,584 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:26:36 WrapperNode [2025-02-05 15:26:36,584 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 15:26:36,585 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 15:26:36,585 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 15:26:36,586 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 15:26:36,589 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:26:36" (1/1) ... [2025-02-05 15:26:36,595 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:26:36" (1/1) ... [2025-02-05 15:26:36,606 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2025-02-05 15:26:36,606 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 15:26:36,607 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 15:26:36,607 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 15:26:36,608 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 15:26:36,612 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:26:36" (1/1) ... [2025-02-05 15:26:36,612 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:26:36" (1/1) ... [2025-02-05 15:26:36,617 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:26:36" (1/1) ... [2025-02-05 15:26:36,625 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 15:26:36,625 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:26:36" (1/1) ... [2025-02-05 15:26:36,625 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:26:36" (1/1) ... [2025-02-05 15:26:36,627 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:26:36" (1/1) ... [2025-02-05 15:26:36,628 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:26:36" (1/1) ... [2025-02-05 15:26:36,629 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:26:36" (1/1) ... [2025-02-05 15:26:36,630 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:26:36" (1/1) ... [2025-02-05 15:26:36,632 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 15:26:36,633 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 15:26:36,633 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 15:26:36,633 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 15:26:36,634 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:26:36" (1/1) ... [2025-02-05 15:26:36,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:26:36,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:26:36,659 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 15:26:36,661 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 15:26:36,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 15:26:36,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 15:26:36,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 15:26:36,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 15:26:36,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-05 15:26:36,679 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-05 15:26:36,719 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 15:26:36,720 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 15:26:36,807 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-02-05 15:26:36,808 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 15:26:36,813 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 15:26:36,814 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 15:26:36,814 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:26:36 BoogieIcfgContainer [2025-02-05 15:26:36,814 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 15:26:36,816 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 15:26:36,816 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 15:26:36,819 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 15:26:36,819 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 03:26:36" (1/3) ... [2025-02-05 15:26:36,819 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e54065c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:26:36, skipping insertion in model container [2025-02-05 15:26:36,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:26:36" (2/3) ... [2025-02-05 15:26:36,820 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e54065c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:26:36, skipping insertion in model container [2025-02-05 15:26:36,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:26:36" (3/3) ... [2025-02-05 15:26:36,821 INFO L128 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound100.c [2025-02-05 15:26:36,831 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 15:26:36,833 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG prodbin-ll_unwindbound100.c that has 2 procedures, 21 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-02-05 15:26:36,864 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 15:26:36,872 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;@21509890, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 15:26:36,872 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 15:26:36,878 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 15:26:36,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-05 15:26:36,882 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:26:36,882 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:26:36,883 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:26:36,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:26:36,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1374148916, now seen corresponding path program 1 times [2025-02-05 15:26:36,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:26:36,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518235285] [2025-02-05 15:26:36,892 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:26:36,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:26:36,934 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-05 15:26:36,945 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-05 15:26:36,946 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:26:36,946 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:26:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 15:26:36,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:26:36,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518235285] [2025-02-05 15:26:36,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518235285] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:26:36,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:26:36,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-05 15:26:36,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808006774] [2025-02-05 15:26:36,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:26:36,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-05 15:26:36,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:26:36,993 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-05 15:26:36,994 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-05 15:26:36,995 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 15:26:37,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:26:37,005 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2025-02-05 15:26:37,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-05 15:26:37,006 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-02-05 15:26:37,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:26:37,010 INFO L225 Difference]: With dead ends: 39 [2025-02-05 15:26:37,010 INFO L226 Difference]: Without dead ends: 17 [2025-02-05 15:26:37,012 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-05 15:26:37,014 INFO L435 NwaCegarLoop]: 24 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, 24 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 15:26:37,014 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:26:37,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2025-02-05 15:26:37,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2025-02-05 15:26:37,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 15:26:37,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2025-02-05 15:26:37,035 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 9 [2025-02-05 15:26:37,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:26:37,035 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2025-02-05 15:26:37,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 15:26:37,035 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2025-02-05 15:26:37,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-02-05 15:26:37,036 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:26:37,036 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:26:37,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 15:26:37,036 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:26:37,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:26:37,037 INFO L85 PathProgramCache]: Analyzing trace with hash 307772215, now seen corresponding path program 1 times [2025-02-05 15:26:37,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:26:37,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941267942] [2025-02-05 15:26:37,037 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:26:37,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:26:37,043 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-05 15:26:37,053 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-05 15:26:37,053 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:26:37,053 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:26:37,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [316357902] [2025-02-05 15:26:37,055 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:26:37,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:26:37,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:26:37,060 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 15:26:37,062 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 15:26:37,087 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-05 15:26:37,097 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-05 15:26:37,097 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:26:37,097 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:26:37,099 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 15:26:37,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:26:37,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 15:26:37,225 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 15:26:37,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:26:37,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941267942] [2025-02-05 15:26:37,226 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:26:37,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316357902] [2025-02-05 15:26:37,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316357902] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:26:37,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:26:37,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-05 15:26:37,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896525355] [2025-02-05 15:26:37,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:26:37,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 15:26:37,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:26:37,227 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 15:26:37,228 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-02-05 15:26:37,228 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 15:26:37,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:26:37,279 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2025-02-05 15:26:37,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-05 15:26:37,280 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-02-05 15:26:37,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:26:37,280 INFO L225 Difference]: With dead ends: 35 [2025-02-05 15:26:37,281 INFO L226 Difference]: Without dead ends: 28 [2025-02-05 15:26:37,281 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-05 15:26:37,281 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:26:37,282 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 54 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:26:37,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-02-05 15:26:37,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2025-02-05 15:26:37,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 15:26:37,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2025-02-05 15:26:37,286 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 10 [2025-02-05 15:26:37,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:26:37,286 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2025-02-05 15:26:37,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 15:26:37,286 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2025-02-05 15:26:37,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-02-05 15:26:37,287 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:26:37,287 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:26:37,297 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 15:26:37,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:26:37,491 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:26:37,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:26:37,493 INFO L85 PathProgramCache]: Analyzing trace with hash 308636154, now seen corresponding path program 1 times [2025-02-05 15:26:37,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:26:37,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770757400] [2025-02-05 15:26:37,493 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:26:37,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:26:37,502 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-05 15:26:37,506 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-05 15:26:37,506 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:26:37,506 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:26:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 15:26:37,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:26:37,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770757400] [2025-02-05 15:26:37,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770757400] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:26:37,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:26:37,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-05 15:26:37,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759331962] [2025-02-05 15:26:37,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:26:37,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-05 15:26:37,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:26:37,565 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-05 15:26:37,565 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-05 15:26:37,565 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 15:26:37,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:26:37,576 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2025-02-05 15:26:37,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-05 15:26:37,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-02-05 15:26:37,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:26:37,577 INFO L225 Difference]: With dead ends: 32 [2025-02-05 15:26:37,577 INFO L226 Difference]: Without dead ends: 25 [2025-02-05 15:26:37,578 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 15:26:37,578 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:26:37,579 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:26:37,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-02-05 15:26:37,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2025-02-05 15:26:37,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 15:26:37,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2025-02-05 15:26:37,587 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 10 [2025-02-05 15:26:37,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:26:37,587 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2025-02-05 15:26:37,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 15:26:37,588 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2025-02-05 15:26:37,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-02-05 15:26:37,588 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:26:37,588 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:26:37,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-05 15:26:37,588 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:26:37,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:26:37,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1350144637, now seen corresponding path program 1 times [2025-02-05 15:26:37,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:26:37,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548587404] [2025-02-05 15:26:37,589 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:26:37,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:26:37,596 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-05 15:26:37,616 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-05 15:26:37,616 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:26:37,616 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:26:37,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899392291] [2025-02-05 15:26:37,621 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:26:37,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:26:37,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:26:37,623 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 15:26:37,636 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 15:26:37,663 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-05 15:26:37,675 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-05 15:26:37,676 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:26:37,676 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:26:37,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-05 15:26:37,678 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:26:37,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 15:26:37,904 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:26:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 15:26:38,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:26:38,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548587404] [2025-02-05 15:26:38,787 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:26:38,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899392291] [2025-02-05 15:26:38,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899392291] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:26:38,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:26:38,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2025-02-05 15:26:38,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793458478] [2025-02-05 15:26:38,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:26:38,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-05 15:26:38,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:26:38,789 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-05 15:26:38,789 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2025-02-05 15:26:38,789 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 15:26:39,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:26:39,084 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2025-02-05 15:26:39,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-05 15:26:39,084 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2025-02-05 15:26:39,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:26:39,086 INFO L225 Difference]: With dead ends: 46 [2025-02-05 15:26:39,086 INFO L226 Difference]: Without dead ends: 44 [2025-02-05 15:26:39,086 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2025-02-05 15:26:39,087 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:26:39,087 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 116 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:26:39,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-02-05 15:26:39,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2025-02-05 15:26:39,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 33 states have internal predecessors, (40), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-05 15:26:39,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2025-02-05 15:26:39,094 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 20 [2025-02-05 15:26:39,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:26:39,094 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2025-02-05 15:26:39,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 15:26:39,095 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2025-02-05 15:26:39,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-02-05 15:26:39,096 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:26:39,096 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:26:39,102 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 15:26:39,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:26:39,300 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:26:39,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:26:39,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1351008576, now seen corresponding path program 1 times [2025-02-05 15:26:39,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:26:39,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030031865] [2025-02-05 15:26:39,301 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:26:39,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:26:39,306 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-05 15:26:39,316 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-05 15:26:39,318 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:26:39,318 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:26:39,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 15:26:39,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:26:39,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030031865] [2025-02-05 15:26:39,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030031865] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:26:39,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553701304] [2025-02-05 15:26:39,427 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:26:39,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:26:39,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:26:39,429 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 15:26:39,431 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 15:26:39,451 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-05 15:26:39,462 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-05 15:26:39,462 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:26:39,462 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:26:39,463 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-05 15:26:39,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:26:39,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 15:26:39,488 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:26:39,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 15:26:39,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553701304] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:26:39,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:26:39,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 10 [2025-02-05 15:26:39,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995888367] [2025-02-05 15:26:39,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:26:39,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-05 15:26:39,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:26:39,531 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-05 15:26:39,532 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-02-05 15:26:39,532 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-05 15:26:39,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:26:39,586 INFO L93 Difference]: Finished difference Result 91 states and 107 transitions. [2025-02-05 15:26:39,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 15:26:39,588 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2025-02-05 15:26:39,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:26:39,589 INFO L225 Difference]: With dead ends: 91 [2025-02-05 15:26:39,589 INFO L226 Difference]: Without dead ends: 84 [2025-02-05 15:26:39,589 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2025-02-05 15:26:39,590 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:26:39,590 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 86 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:26:39,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-02-05 15:26:39,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2025-02-05 15:26:39,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 67 states have internal predecessors, (76), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 15:26:39,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2025-02-05 15:26:39,607 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 20 [2025-02-05 15:26:39,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:26:39,607 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2025-02-05 15:26:39,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-05 15:26:39,608 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2025-02-05 15:26:39,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-02-05 15:26:39,608 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:26:39,609 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:26:39,615 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 15:26:39,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:26:39,810 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:26:39,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:26:39,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1202012324, now seen corresponding path program 1 times [2025-02-05 15:26:39,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:26:39,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950960039] [2025-02-05 15:26:39,810 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:26:39,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:26:39,815 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-05 15:26:39,831 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-05 15:26:39,831 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:26:39,831 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:26:39,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [870666294] [2025-02-05 15:26:39,832 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:26:39,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:26:39,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:26:39,840 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 15:26:39,841 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 15:26:39,864 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-05 15:26:39,876 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-05 15:26:39,876 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:26:39,876 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:26:39,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-05 15:26:39,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:26:40,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 15:26:40,146 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:26:40,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 15:26:40,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:26:40,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950960039] [2025-02-05 15:26:40,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:26:40,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870666294] [2025-02-05 15:26:40,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870666294] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:26:40,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:26:40,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2025-02-05 15:26:40,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149907613] [2025-02-05 15:26:40,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:26:40,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-05 15:26:40,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:26:40,605 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-05 15:26:40,605 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2025-02-05 15:26:40,605 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 15:26:41,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:26:41,086 INFO L93 Difference]: Finished difference Result 114 states and 129 transitions. [2025-02-05 15:26:41,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-05 15:26:41,087 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2025-02-05 15:26:41,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:26:41,088 INFO L225 Difference]: With dead ends: 114 [2025-02-05 15:26:41,088 INFO L226 Difference]: Without dead ends: 103 [2025-02-05 15:26:41,088 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2025-02-05 15:26:41,088 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 15:26:41,089 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 114 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 15:26:41,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2025-02-05 15:26:41,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 83. [2025-02-05 15:26:41,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.196969696969697) internal successors, (79), 68 states have internal predecessors, (79), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 15:26:41,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2025-02-05 15:26:41,110 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 20 [2025-02-05 15:26:41,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:26:41,111 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2025-02-05 15:26:41,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 15:26:41,111 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2025-02-05 15:26:41,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-02-05 15:26:41,111 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:26:41,111 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:26:41,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-05 15:26:41,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-02-05 15:26:41,312 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:26:41,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:26:41,313 INFO L85 PathProgramCache]: Analyzing trace with hash -514558041, now seen corresponding path program 1 times [2025-02-05 15:26:41,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:26:41,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669886412] [2025-02-05 15:26:41,313 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:26:41,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:26:41,318 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-05 15:26:41,328 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-05 15:26:41,328 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:26:41,328 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:26:41,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [930645851] [2025-02-05 15:26:41,329 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:26:41,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:26:41,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:26:41,331 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 15:26:41,334 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 15:26:41,354 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-05 15:26:41,365 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-05 15:26:41,365 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:26:41,365 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:26:41,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 15:26:41,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:26:41,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 15:26:41,416 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:26:41,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 15:26:41,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:26:41,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669886412] [2025-02-05 15:26:41,471 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:26:41,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930645851] [2025-02-05 15:26:41,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930645851] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:26:41,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:26:41,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2025-02-05 15:26:41,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667233479] [2025-02-05 15:26:41,472 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:26:41,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-05 15:26:41,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:26:41,473 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-05 15:26:41,473 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-02-05 15:26:41,476 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2025-02-05 15:26:41,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:26:41,532 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2025-02-05 15:26:41,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-05 15:26:41,533 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2025-02-05 15:26:41,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:26:41,533 INFO L225 Difference]: With dead ends: 92 [2025-02-05 15:26:41,533 INFO L226 Difference]: Without dead ends: 82 [2025-02-05 15:26:41,534 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2025-02-05 15:26:41,534 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:26:41,534 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 84 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:26:41,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-02-05 15:26:41,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2025-02-05 15:26:41,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 64 states have (on average 1.140625) internal successors, (73), 66 states have internal predecessors, (73), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 15:26:41,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2025-02-05 15:26:41,553 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 26 [2025-02-05 15:26:41,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:26:41,554 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2025-02-05 15:26:41,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2025-02-05 15:26:41,554 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2025-02-05 15:26:41,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-02-05 15:26:41,554 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:26:41,554 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:26:41,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-05 15:26:41,759 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 15:26:41,759 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:26:41,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:26:41,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1097281384, now seen corresponding path program 1 times [2025-02-05 15:26:41,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:26:41,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931306886] [2025-02-05 15:26:41,760 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:26:41,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:26:41,767 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-05 15:26:41,799 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-05 15:26:41,799 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:26:41,799 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:26:41,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [701697921] [2025-02-05 15:26:41,801 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:26:41,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:26:41,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:26:41,806 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 15:26:41,808 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 15:26:41,830 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-05 15:26:41,843 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-05 15:26:41,844 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:26:41,844 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:26:41,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-02-05 15:26:41,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:26:42,197 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 15:26:42,197 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:26:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-05 15:26:44,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:26:44,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931306886] [2025-02-05 15:26:44,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:26:44,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701697921] [2025-02-05 15:26:44,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701697921] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:26:44,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:26:44,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2025-02-05 15:26:44,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805509470] [2025-02-05 15:26:44,126 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:26:44,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-05 15:26:44,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:26:44,127 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-05 15:26:44,127 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2025-02-05 15:26:44,127 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 19 states have internal predecessors, (50), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-02-05 15:26:47,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:26:47,995 INFO L93 Difference]: Finished difference Result 123 states and 140 transitions. [2025-02-05 15:26:47,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-05 15:26:47,997 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 19 states have internal predecessors, (50), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 40 [2025-02-05 15:26:47,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:26:47,999 INFO L225 Difference]: With dead ends: 123 [2025-02-05 15:26:47,999 INFO L226 Difference]: Without dead ends: 121 [2025-02-05 15:26:48,000 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2025-02-05 15:26:48,000 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-02-05 15:26:48,001 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 220 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-02-05 15:26:48,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2025-02-05 15:26:48,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2025-02-05 15:26:48,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 94 states have (on average 1.148936170212766) internal successors, (108), 99 states have internal predecessors, (108), 14 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (13), 9 states have call predecessors, (13), 13 states have call successors, (13) [2025-02-05 15:26:48,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 135 transitions. [2025-02-05 15:26:48,027 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 135 transitions. Word has length 40 [2025-02-05 15:26:48,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:26:48,027 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 135 transitions. [2025-02-05 15:26:48,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 19 states have internal predecessors, (50), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-02-05 15:26:48,028 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 135 transitions. [2025-02-05 15:26:48,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-02-05 15:26:48,029 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:26:48,029 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:26:48,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-05 15:26:48,230 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 15:26:48,230 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:26:48,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:26:48,230 INFO L85 PathProgramCache]: Analyzing trace with hash 100209031, now seen corresponding path program 2 times [2025-02-05 15:26:48,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:26:48,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729535635] [2025-02-05 15:26:48,231 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:26:48,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:26:48,239 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes. [2025-02-05 15:26:48,270 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-02-05 15:26:48,271 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:26:48,271 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:26:48,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [971276237] [2025-02-05 15:26:48,273 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:26:48,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:26:48,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:26:48,277 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 15:26:48,283 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 15:26:48,305 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes. [2025-02-05 15:26:48,320 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-02-05 15:26:48,321 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:26:48,321 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:26:48,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-02-05 15:26:48,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:26:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 15:26:48,979 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:27:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 15:27:00,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:27:00,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729535635] [2025-02-05 15:27:00,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:27:00,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971276237] [2025-02-05 15:27:00,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971276237] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:27:00,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:27:00,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2025-02-05 15:27:00,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366433445] [2025-02-05 15:27:00,270 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:27:00,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-05 15:27:00,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:27:00,271 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-05 15:27:00,271 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2025-02-05 15:27:00,271 INFO L87 Difference]: Start difference. First operand 118 states and 135 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 15:27:06,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-05 15:27:17,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:27:17,982 INFO L93 Difference]: Finished difference Result 168 states and 202 transitions. [2025-02-05 15:27:17,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-05 15:27:17,982 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 40 [2025-02-05 15:27:17,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:27:17,984 INFO L225 Difference]: With dead ends: 168 [2025-02-05 15:27:17,984 INFO L226 Difference]: Without dead ends: 166 [2025-02-05 15:27:17,985 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2025-02-05 15:27:17,985 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:27:17,985 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 215 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2025-02-05 15:27:17,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2025-02-05 15:27:17,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 158. [2025-02-05 15:27:17,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 127 states have (on average 1.204724409448819) internal successors, (153), 132 states have internal predecessors, (153), 20 states have call successors, (20), 10 states have call predecessors, (20), 10 states have return successors, (19), 15 states have call predecessors, (19), 19 states have call successors, (19) [2025-02-05 15:27:18,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 192 transitions. [2025-02-05 15:27:18,000 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 192 transitions. Word has length 40 [2025-02-05 15:27:18,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:27:18,000 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 192 transitions. [2025-02-05 15:27:18,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 15:27:18,001 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 192 transitions. [2025-02-05 15:27:18,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-02-05 15:27:18,002 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:27:18,002 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:27:18,008 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 15:27:18,202 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 15:27:18,203 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:27:18,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:27:18,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1000933906, now seen corresponding path program 2 times [2025-02-05 15:27:18,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:27:18,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084264766] [2025-02-05 15:27:18,208 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:27:18,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:27:18,211 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-02-05 15:27:18,224 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-02-05 15:27:18,228 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:27:18,228 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:27:18,438 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-05 15:27:18,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:27:18,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084264766] [2025-02-05 15:27:18,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084264766] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:27:18,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698523198] [2025-02-05 15:27:18,438 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:27:18,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:27:18,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:27:18,442 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 15:27:18,442 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 15:27:18,466 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-02-05 15:27:18,485 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-02-05 15:27:18,485 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:27:18,485 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:27:18,486 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-05 15:27:18,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:27:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 15:27:18,564 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:27:18,654 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-05 15:27:18,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698523198] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:27:18,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:27:18,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 8] total 17 [2025-02-05 15:27:18,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448325534] [2025-02-05 15:27:18,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:27:18,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-05 15:27:18,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:27:18,657 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-05 15:27:18,657 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2025-02-05 15:27:18,658 INFO L87 Difference]: Start difference. First operand 158 states and 192 transitions. Second operand has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 17 states have internal predecessors, (78), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2025-02-05 15:27:18,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:27:18,791 INFO L93 Difference]: Finished difference Result 395 states and 465 transitions. [2025-02-05 15:27:18,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-05 15:27:18,791 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 17 states have internal predecessors, (78), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 50 [2025-02-05 15:27:18,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:27:18,793 INFO L225 Difference]: With dead ends: 395 [2025-02-05 15:27:18,793 INFO L226 Difference]: Without dead ends: 388 [2025-02-05 15:27:18,794 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2025-02-05 15:27:18,794 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 74 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:27:18,794 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 146 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:27:18,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2025-02-05 15:27:18,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 344. [2025-02-05 15:27:18,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 275 states have (on average 1.1418181818181818) internal successors, (314), 282 states have internal predecessors, (314), 36 states have call successors, (36), 32 states have call predecessors, (36), 32 states have return successors, (35), 29 states have call predecessors, (35), 35 states have call successors, (35) [2025-02-05 15:27:18,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 385 transitions. [2025-02-05 15:27:18,842 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 385 transitions. Word has length 50 [2025-02-05 15:27:18,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:27:18,845 INFO L471 AbstractCegarLoop]: Abstraction has 344 states and 385 transitions. [2025-02-05 15:27:18,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 17 states have internal predecessors, (78), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2025-02-05 15:27:18,846 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 385 transitions. [2025-02-05 15:27:18,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-02-05 15:27:18,846 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:27:18,846 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2025-02-05 15:27:18,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-05 15:27:19,047 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 15:27:19,047 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:27:19,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:27:19,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1171091893, now seen corresponding path program 2 times [2025-02-05 15:27:19,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:27:19,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604661706] [2025-02-05 15:27:19,048 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:27:19,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:27:19,055 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-02-05 15:27:19,081 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-02-05 15:27:19,084 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:27:19,085 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:27:19,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2133088686] [2025-02-05 15:27:19,086 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:27:19,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:27:19,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:27:19,088 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 15:27:19,093 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 15:27:19,116 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-02-05 15:27:19,130 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-02-05 15:27:19,130 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:27:19,130 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:27:19,131 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-02-05 15:27:19,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:27:19,961 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 50 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 15:27:19,962 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:27:21,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:27:21,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604661706] [2025-02-05 15:27:21,253 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:27:21,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133088686] [2025-02-05 15:27:21,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133088686] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:27:21,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:27:21,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2025-02-05 15:27:21,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53867197] [2025-02-05 15:27:21,254 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 15:27:21,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-05 15:27:21,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:27:21,254 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-05 15:27:21,255 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2025-02-05 15:27:21,255 INFO L87 Difference]: Start difference. First operand 344 states and 385 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-05 15:27:21,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:27:21,614 INFO L93 Difference]: Finished difference Result 346 states and 386 transitions. [2025-02-05 15:27:21,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-05 15:27:21,614 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 50 [2025-02-05 15:27:21,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:27:21,620 INFO L225 Difference]: With dead ends: 346 [2025-02-05 15:27:21,620 INFO L226 Difference]: Without dead ends: 344 [2025-02-05 15:27:21,620 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2025-02-05 15:27:21,621 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 15:27:21,621 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 209 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 15:27:21,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2025-02-05 15:27:21,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2025-02-05 15:27:21,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 275 states have (on average 1.1381818181818182) internal successors, (313), 282 states have internal predecessors, (313), 36 states have call successors, (36), 32 states have call predecessors, (36), 32 states have return successors, (35), 29 states have call predecessors, (35), 35 states have call successors, (35) [2025-02-05 15:27:21,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 384 transitions. [2025-02-05 15:27:21,647 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 384 transitions. Word has length 50 [2025-02-05 15:27:21,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:27:21,647 INFO L471 AbstractCegarLoop]: Abstraction has 344 states and 384 transitions. [2025-02-05 15:27:21,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-05 15:27:21,648 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 384 transitions. [2025-02-05 15:27:21,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-02-05 15:27:21,648 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:27:21,648 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2025-02-05 15:27:21,654 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 15:27:21,849 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 15:27:21,849 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:27:21,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:27:21,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1618523792, now seen corresponding path program 3 times [2025-02-05 15:27:21,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:27:21,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062862962] [2025-02-05 15:27:21,850 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:27:21,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:27:21,854 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 60 statements into 6 equivalence classes. [2025-02-05 15:27:21,892 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 60 of 60 statements. [2025-02-05 15:27:21,892 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-05 15:27:21,892 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:27:21,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639590697] [2025-02-05 15:27:21,893 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:27:21,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:27:21,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:27:21,896 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 15:27:21,897 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 15:27:21,917 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 60 statements into 6 equivalence classes. [2025-02-05 15:27:21,959 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 60 of 60 statements. [2025-02-05 15:27:21,959 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-05 15:27:21,959 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:27:21,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-02-05 15:27:21,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:27:22,894 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-05 15:27:22,894 INFO L312 TraceCheckSpWp]: Computing backward predicates...