./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum3.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 d3267df59902b667587c98ecbe021c99cc3d2a5e5866fbd08ee1fb3133370aa4 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 17:06:24,610 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 17:06:24,665 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 17:06:24,670 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 17:06:24,671 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 17:06:24,693 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 17:06:24,694 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 17:06:24,694 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 17:06:24,695 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 17:06:24,695 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 17:06:24,695 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 17:06:24,695 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 17:06:24,695 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 17:06:24,695 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 17:06:24,695 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 17:06:24,695 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 17:06:24,695 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 17:06:24,696 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 17:06:24,696 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 17:06:24,697 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 17:06:24,697 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 17:06:24,697 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 17:06:24,697 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 17:06:24,697 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 17:06:24,697 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 17:06:24,697 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 17:06:24,697 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 17:06:24,697 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 17:06:24,697 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 17:06:24,697 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 17:06:24,697 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 17:06:24,697 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 17:06:24,697 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 17:06:24,697 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 17:06:24,697 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 17:06:24,697 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 17:06:24,697 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 17:06:24,697 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 17:06:24,697 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 17:06:24,697 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 17:06:24,698 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 17:06:24,698 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 17:06:24,698 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 17:06:24,698 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 -> d3267df59902b667587c98ecbe021c99cc3d2a5e5866fbd08ee1fb3133370aa4 [2025-02-07 17:06:24,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 17:06:24,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 17:06:24,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 17:06:24,934 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 17:06:24,934 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 17:06:24,936 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum3.c [2025-02-07 17:06:26,082 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9e999f60a/428ed613f86d42ab8d6020f006980a53/FLAG198beae93 [2025-02-07 17:06:26,360 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 17:06:26,361 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum3.c [2025-02-07 17:06:26,370 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9e999f60a/428ed613f86d42ab8d6020f006980a53/FLAG198beae93 [2025-02-07 17:06:26,651 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9e999f60a/428ed613f86d42ab8d6020f006980a53 [2025-02-07 17:06:26,653 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 17:06:26,653 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 17:06:26,654 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 17:06:26,654 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 17:06:26,657 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 17:06:26,658 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 05:06:26" (1/1) ... [2025-02-07 17:06:26,658 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6da76ceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:26, skipping insertion in model container [2025-02-07 17:06:26,658 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 05:06:26" (1/1) ... [2025-02-07 17:06:26,667 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 17:06:26,744 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/array-crafted/zero_sum3.c[400,413] [2025-02-07 17:06:26,754 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 17:06:26,760 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 17:06:26,766 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/array-crafted/zero_sum3.c[400,413] [2025-02-07 17:06:26,770 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 17:06:26,778 INFO L204 MainTranslator]: Completed translation [2025-02-07 17:06:26,779 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:26 WrapperNode [2025-02-07 17:06:26,779 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 17:06:26,780 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 17:06:26,781 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 17:06:26,781 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 17:06:26,785 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:26" (1/1) ... [2025-02-07 17:06:26,789 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:26" (1/1) ... [2025-02-07 17:06:26,799 INFO L138 Inliner]: procedures = 15, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 87 [2025-02-07 17:06:26,800 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 17:06:26,801 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 17:06:26,801 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 17:06:26,801 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 17:06:26,806 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:26" (1/1) ... [2025-02-07 17:06:26,806 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:26" (1/1) ... [2025-02-07 17:06:26,807 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:26" (1/1) ... [2025-02-07 17:06:26,814 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-02-07 17:06:26,814 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:26" (1/1) ... [2025-02-07 17:06:26,815 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:26" (1/1) ... [2025-02-07 17:06:26,817 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:26" (1/1) ... [2025-02-07 17:06:26,818 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:26" (1/1) ... [2025-02-07 17:06:26,818 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:26" (1/1) ... [2025-02-07 17:06:26,819 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:26" (1/1) ... [2025-02-07 17:06:26,820 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 17:06:26,820 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 17:06:26,820 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 17:06:26,820 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 17:06:26,821 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:26" (1/1) ... [2025-02-07 17:06:26,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 17:06:26,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:26,841 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-07 17:06:26,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-07 17:06:26,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 17:06:26,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 17:06:26,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-07 17:06:26,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-07 17:06:26,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-07 17:06:26,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-07 17:06:26,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 17:06:26,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 17:06:26,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-07 17:06:26,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-07 17:06:26,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-07 17:06:26,908 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 17:06:26,910 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 17:06:27,037 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-02-07 17:06:27,037 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 17:06:27,046 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 17:06:27,046 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 17:06:27,046 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 05:06:27 BoogieIcfgContainer [2025-02-07 17:06:27,047 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 17:06:27,050 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 17:06:27,050 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 17:06:27,053 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 17:06:27,053 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 05:06:26" (1/3) ... [2025-02-07 17:06:27,054 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d6bf291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 05:06:27, skipping insertion in model container [2025-02-07 17:06:27,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:26" (2/3) ... [2025-02-07 17:06:27,054 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d6bf291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 05:06:27, skipping insertion in model container [2025-02-07 17:06:27,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 05:06:27" (3/3) ... [2025-02-07 17:06:27,055 INFO L128 eAbstractionObserver]: Analyzing ICFG zero_sum3.c [2025-02-07 17:06:27,066 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 17:06:27,068 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG zero_sum3.c that has 1 procedures, 16 locations, 1 initial locations, 7 loop locations, and 1 error locations. [2025-02-07 17:06:27,107 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 17:06:27,118 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;@3fdf0143, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 17:06:27,119 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 17:06:27,122 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:27,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-02-07 17:06:27,126 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:27,127 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:27,127 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:27,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:27,131 INFO L85 PathProgramCache]: Analyzing trace with hash -845513108, now seen corresponding path program 1 times [2025-02-07 17:06:27,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:27,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390882309] [2025-02-07 17:06:27,137 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:06:27,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:27,191 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-07 17:06:27,202 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-07 17:06:27,202 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:27,202 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:27,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:27,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:27,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390882309] [2025-02-07 17:06:27,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390882309] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 17:06:27,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 17:06:27,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-07 17:06:27,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878336948] [2025-02-07 17:06:27,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 17:06:27,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-07 17:06:27,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:27,332 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-07 17:06:27,332 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 17:06:27,333 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:27,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:27,376 INFO L93 Difference]: Finished difference Result 30 states and 45 transitions. [2025-02-07 17:06:27,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-07 17:06:27,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-02-07 17:06:27,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:27,381 INFO L225 Difference]: With dead ends: 30 [2025-02-07 17:06:27,381 INFO L226 Difference]: Without dead ends: 13 [2025-02-07 17:06:27,383 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 17:06:27,386 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:27,388 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:06:27,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2025-02-07 17:06:27,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2025-02-07 17:06:27,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:27,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 19 transitions. [2025-02-07 17:06:27,408 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 19 transitions. Word has length 11 [2025-02-07 17:06:27,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:27,409 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 19 transitions. [2025-02-07 17:06:27,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:27,409 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 19 transitions. [2025-02-07 17:06:27,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-02-07 17:06:27,410 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:27,410 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:27,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 17:06:27,411 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:27,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:27,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1067269911, now seen corresponding path program 1 times [2025-02-07 17:06:27,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:27,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732917782] [2025-02-07 17:06:27,412 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:06:27,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:27,427 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-07 17:06:27,439 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-07 17:06:27,441 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:27,441 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:27,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 17:06:27,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:27,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732917782] [2025-02-07 17:06:27,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732917782] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 17:06:27,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 17:06:27,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-07 17:06:27,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198342570] [2025-02-07 17:06:27,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 17:06:27,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-07 17:06:27,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:27,521 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-07 17:06:27,521 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-07 17:06:27,521 INFO L87 Difference]: Start difference. First operand 13 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:27,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:27,570 INFO L93 Difference]: Finished difference Result 27 states and 43 transitions. [2025-02-07 17:06:27,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-07 17:06:27,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2025-02-07 17:06:27,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:27,572 INFO L225 Difference]: With dead ends: 27 [2025-02-07 17:06:27,572 INFO L226 Difference]: Without dead ends: 19 [2025-02-07 17:06:27,572 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-07 17:06:27,573 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 20 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:27,573 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 6 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:06:27,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2025-02-07 17:06:27,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2025-02-07 17:06:27,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:27,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2025-02-07 17:06:27,580 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 12 [2025-02-07 17:06:27,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:27,580 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2025-02-07 17:06:27,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:27,580 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2025-02-07 17:06:27,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-02-07 17:06:27,580 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:27,580 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:27,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-07 17:06:27,580 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:27,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:27,581 INFO L85 PathProgramCache]: Analyzing trace with hash -2131088553, now seen corresponding path program 1 times [2025-02-07 17:06:27,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:27,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878221737] [2025-02-07 17:06:27,581 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:06:27,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:27,592 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-07 17:06:27,611 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-07 17:06:27,613 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:27,613 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:27,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 17:06:27,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:27,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878221737] [2025-02-07 17:06:27,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878221737] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:27,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524057042] [2025-02-07 17:06:27,720 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:06:27,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:27,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:27,723 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:27,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-07 17:06:27,771 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-07 17:06:27,785 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-07 17:06:27,786 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:27,786 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:27,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-07 17:06:27,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:27,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 17:06:27,823 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:27,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 17:06:27,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524057042] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:27,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:27,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-02-07 17:06:27,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341800767] [2025-02-07 17:06:27,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:27,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-07 17:06:27,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:27,843 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-07 17:06:27,843 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2025-02-07 17:06:27,843 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:27,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:27,876 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2025-02-07 17:06:27,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-07 17:06:27,877 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2025-02-07 17:06:27,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:27,877 INFO L225 Difference]: With dead ends: 35 [2025-02-07 17:06:27,877 INFO L226 Difference]: Without dead ends: 20 [2025-02-07 17:06:27,878 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2025-02-07 17:06:27,878 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:27,878 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:06:27,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-02-07 17:06:27,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-02-07 17:06:27,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:27,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2025-02-07 17:06:27,882 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 18 [2025-02-07 17:06:27,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:27,882 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2025-02-07 17:06:27,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:27,882 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2025-02-07 17:06:27,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-07 17:06:27,882 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:27,882 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:27,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-07 17:06:28,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:28,087 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:28,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:28,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1841849420, now seen corresponding path program 2 times [2025-02-07 17:06:28,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:28,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861977953] [2025-02-07 17:06:28,088 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:06:28,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:28,095 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-07 17:06:28,101 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 17:06:28,102 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:06:28,102 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:28,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-07 17:06:28,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:28,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861977953] [2025-02-07 17:06:28,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861977953] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:28,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476166125] [2025-02-07 17:06:28,154 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:06:28,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:28,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:28,156 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:28,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-07 17:06:28,188 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-07 17:06:28,202 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 17:06:28,202 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:06:28,202 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:28,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-07 17:06:28,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:28,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-07 17:06:28,229 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:28,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-07 17:06:28,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476166125] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:28,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:28,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-02-07 17:06:28,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870090513] [2025-02-07 17:06:28,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:28,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-07 17:06:28,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:28,248 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-07 17:06:28,249 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-02-07 17:06:28,249 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:28,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:28,295 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2025-02-07 17:06:28,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 17:06:28,295 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2025-02-07 17:06:28,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:28,296 INFO L225 Difference]: With dead ends: 39 [2025-02-07 17:06:28,296 INFO L226 Difference]: Without dead ends: 26 [2025-02-07 17:06:28,296 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-02-07 17:06:28,297 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 20 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:28,297 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 8 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:06:28,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-02-07 17:06:28,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2025-02-07 17:06:28,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:28,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2025-02-07 17:06:28,300 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 19 [2025-02-07 17:06:28,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:28,300 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2025-02-07 17:06:28,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:28,300 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2025-02-07 17:06:28,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-02-07 17:06:28,301 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:28,301 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:28,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-07 17:06:28,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:28,502 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:28,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:28,503 INFO L85 PathProgramCache]: Analyzing trace with hash -820064244, now seen corresponding path program 3 times [2025-02-07 17:06:28,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:28,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938547285] [2025-02-07 17:06:28,503 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:06:28,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:28,510 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 2 equivalence classes. [2025-02-07 17:06:28,529 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-07 17:06:28,530 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-07 17:06:28,530 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:29,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:29,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938547285] [2025-02-07 17:06:29,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938547285] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:29,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147867730] [2025-02-07 17:06:29,570 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:06:29,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:29,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:29,572 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:29,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-07 17:06:29,627 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 2 equivalence classes. [2025-02-07 17:06:29,645 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-07 17:06:29,646 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-07 17:06:29,646 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:29,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-02-07 17:06:29,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:29,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:06:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:29,831 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 17:06:29,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147867730] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:29,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:29,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 20 [2025-02-07 17:06:29,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671316731] [2025-02-07 17:06:29,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:29,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-07 17:06:29,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:29,977 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-07 17:06:29,977 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2025-02-07 17:06:29,977 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:30,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:30,158 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2025-02-07 17:06:30,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-07 17:06:30,159 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2025-02-07 17:06:30,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:30,159 INFO L225 Difference]: With dead ends: 45 [2025-02-07 17:06:30,159 INFO L226 Difference]: Without dead ends: 42 [2025-02-07 17:06:30,160 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2025-02-07 17:06:30,160 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:30,160 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 69 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:06:30,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-02-07 17:06:30,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2025-02-07 17:06:30,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:30,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2025-02-07 17:06:30,169 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 25 [2025-02-07 17:06:30,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:30,169 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2025-02-07 17:06:30,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:30,169 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2025-02-07 17:06:30,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-02-07 17:06:30,170 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:30,170 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:30,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-07 17:06:30,370 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 [2025-02-07 17:06:30,370 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:30,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:30,371 INFO L85 PathProgramCache]: Analyzing trace with hash 347843959, now seen corresponding path program 4 times [2025-02-07 17:06:30,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:30,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145788223] [2025-02-07 17:06:30,371 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:06:30,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:30,379 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-02-07 17:06:30,382 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 22 of 26 statements. [2025-02-07 17:06:30,383 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:06:30,383 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:30,436 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 17:06:30,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:30,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145788223] [2025-02-07 17:06:30,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145788223] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:30,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928419310] [2025-02-07 17:06:30,437 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:06:30,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:30,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:30,442 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:30,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-07 17:06:30,474 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-02-07 17:06:30,484 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 22 of 26 statements. [2025-02-07 17:06:30,484 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:06:30,484 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:30,485 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 17:06:30,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:30,534 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 17:06:30,534 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 17:06:30,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928419310] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:30,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:30,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2025-02-07 17:06:30,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168213108] [2025-02-07 17:06:30,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:30,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-07 17:06:30,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:30,588 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-07 17:06:30,588 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-02-07 17:06:30,588 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:30,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:30,699 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2025-02-07 17:06:30,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-07 17:06:30,700 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2025-02-07 17:06:30,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:30,700 INFO L225 Difference]: With dead ends: 78 [2025-02-07 17:06:30,700 INFO L226 Difference]: Without dead ends: 47 [2025-02-07 17:06:30,700 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2025-02-07 17:06:30,701 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:30,701 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 20 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:30,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2025-02-07 17:06:30,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2025-02-07 17:06:30,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 42 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:30,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2025-02-07 17:06:30,710 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 26 [2025-02-07 17:06:30,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:30,710 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2025-02-07 17:06:30,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:30,710 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2025-02-07 17:06:30,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-02-07 17:06:30,710 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:30,710 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:30,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-07 17:06:30,911 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 [2025-02-07 17:06:30,911 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:30,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:30,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1748838057, now seen corresponding path program 5 times [2025-02-07 17:06:30,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:30,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310746365] [2025-02-07 17:06:30,915 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:06:30,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:30,925 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 3 equivalence classes. [2025-02-07 17:06:30,939 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-02-07 17:06:30,943 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-07 17:06:30,943 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 17:06:31,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:31,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310746365] [2025-02-07 17:06:31,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310746365] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:31,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039359398] [2025-02-07 17:06:31,015 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:06:31,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:31,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:31,017 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:31,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-07 17:06:31,048 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 3 equivalence classes. [2025-02-07 17:06:31,067 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-02-07 17:06:31,067 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-07 17:06:31,067 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:31,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 17:06:31,069 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:31,108 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 17:06:31,108 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 17:06:31,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039359398] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:31,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:31,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2025-02-07 17:06:31,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835099571] [2025-02-07 17:06:31,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:31,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-07 17:06:31,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:31,150 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-07 17:06:31,150 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-02-07 17:06:31,150 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:31,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:31,244 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2025-02-07 17:06:31,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-07 17:06:31,244 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2025-02-07 17:06:31,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:31,245 INFO L225 Difference]: With dead ends: 47 [2025-02-07 17:06:31,245 INFO L226 Difference]: Without dead ends: 32 [2025-02-07 17:06:31,245 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2025-02-07 17:06:31,245 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 11 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:31,246 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 16 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:31,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-02-07 17:06:31,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2025-02-07 17:06:31,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:31,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2025-02-07 17:06:31,249 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 26 [2025-02-07 17:06:31,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:31,250 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2025-02-07 17:06:31,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:31,250 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2025-02-07 17:06:31,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-02-07 17:06:31,250 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:31,250 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:31,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-07 17:06:31,451 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 [2025-02-07 17:06:31,451 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:31,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:31,451 INFO L85 PathProgramCache]: Analyzing trace with hash 271165580, now seen corresponding path program 6 times [2025-02-07 17:06:31,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:31,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398441448] [2025-02-07 17:06:31,451 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:06:31,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:31,458 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 31 statements into 3 equivalence classes. [2025-02-07 17:06:31,470 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 31 of 31 statements. [2025-02-07 17:06:31,471 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-07 17:06:31,471 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:31,532 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-07 17:06:31,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:31,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398441448] [2025-02-07 17:06:31,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398441448] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:31,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008234631] [2025-02-07 17:06:31,533 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:06:31,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:31,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:31,535 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:31,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-07 17:06:31,572 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 31 statements into 3 equivalence classes. [2025-02-07 17:06:31,604 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 31 of 31 statements. [2025-02-07 17:06:31,604 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-07 17:06:31,604 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:31,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 17:06:31,606 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:31,644 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-07 17:06:31,644 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:31,673 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-07 17:06:31,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008234631] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:31,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:31,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2025-02-07 17:06:31,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998956313] [2025-02-07 17:06:31,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:31,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-07 17:06:31,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:31,675 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-07 17:06:31,675 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2025-02-07 17:06:31,675 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:31,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:31,703 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2025-02-07 17:06:31,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-07 17:06:31,704 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2025-02-07 17:06:31,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:31,704 INFO L225 Difference]: With dead ends: 60 [2025-02-07 17:06:31,704 INFO L226 Difference]: Without dead ends: 33 [2025-02-07 17:06:31,704 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2025-02-07 17:06:31,705 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:31,705 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:06:31,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-02-07 17:06:31,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2025-02-07 17:06:31,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:31,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2025-02-07 17:06:31,709 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 31 [2025-02-07 17:06:31,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:31,709 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2025-02-07 17:06:31,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:31,709 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2025-02-07 17:06:31,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-02-07 17:06:31,709 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:31,709 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:31,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-07 17:06:31,910 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 [2025-02-07 17:06:31,910 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:31,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:31,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1887935049, now seen corresponding path program 7 times [2025-02-07 17:06:31,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:31,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064323900] [2025-02-07 17:06:31,911 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:06:31,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:31,916 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-07 17:06:31,946 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-07 17:06:31,946 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:31,946 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:33,633 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:33,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:33,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064323900] [2025-02-07 17:06:33,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064323900] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:33,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735229502] [2025-02-07 17:06:33,634 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:06:33,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:33,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:33,639 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:33,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-07 17:06:33,675 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-07 17:06:33,694 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-07 17:06:33,694 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:33,694 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:33,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 90 conjuncts are in the unsatisfiable core [2025-02-07 17:06:33,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:33,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:06:33,891 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:33,891 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:34,133 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 17:06:34,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735229502] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:34,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:34,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 15, 11] total 38 [2025-02-07 17:06:34,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912784123] [2025-02-07 17:06:34,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:34,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-02-07 17:06:34,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:34,135 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-02-07 17:06:34,135 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2025-02-07 17:06:34,135 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:34,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:34,963 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2025-02-07 17:06:34,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-02-07 17:06:34,963 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2025-02-07 17:06:34,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:34,965 INFO L225 Difference]: With dead ends: 84 [2025-02-07 17:06:34,965 INFO L226 Difference]: Without dead ends: 81 [2025-02-07 17:06:34,966 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=265, Invalid=2387, Unknown=0, NotChecked=0, Total=2652 [2025-02-07 17:06:34,966 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 7 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:34,966 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 51 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-07 17:06:34,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2025-02-07 17:06:34,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 60. [2025-02-07 17:06:34,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 59 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:34,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2025-02-07 17:06:34,974 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 32 [2025-02-07 17:06:34,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:34,974 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2025-02-07 17:06:34,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:34,975 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2025-02-07 17:06:34,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-02-07 17:06:34,975 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:34,975 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:34,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-07 17:06:35,180 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 [2025-02-07 17:06:35,180 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:35,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:35,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1603587372, now seen corresponding path program 8 times [2025-02-07 17:06:35,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:35,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229808025] [2025-02-07 17:06:35,180 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:06:35,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:35,190 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 33 statements into 2 equivalence classes. [2025-02-07 17:06:35,201 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-02-07 17:06:35,201 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:06:35,201 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:35,289 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-07 17:06:35,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:35,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229808025] [2025-02-07 17:06:35,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229808025] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:35,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929097988] [2025-02-07 17:06:35,289 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:06:35,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:35,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:35,295 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:35,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-07 17:06:35,329 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 33 statements into 2 equivalence classes. [2025-02-07 17:06:35,347 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-02-07 17:06:35,347 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:06:35,347 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:35,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-07 17:06:35,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:35,416 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-07 17:06:35,417 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:35,474 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-07 17:06:35,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929097988] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:35,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:35,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-02-07 17:06:35,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982625145] [2025-02-07 17:06:35,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:35,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-07 17:06:35,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:35,476 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-07 17:06:35,476 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2025-02-07 17:06:35,476 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:35,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:35,574 INFO L93 Difference]: Finished difference Result 127 states and 157 transitions. [2025-02-07 17:06:35,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-07 17:06:35,575 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2025-02-07 17:06:35,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:35,577 INFO L225 Difference]: With dead ends: 127 [2025-02-07 17:06:35,577 INFO L226 Difference]: Without dead ends: 61 [2025-02-07 17:06:35,578 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2025-02-07 17:06:35,578 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:35,579 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:35,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-02-07 17:06:35,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2025-02-07 17:06:35,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.25) internal successors, (75), 60 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2025-02-07 17:06:35,596 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 33 [2025-02-07 17:06:35,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:35,596 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2025-02-07 17:06:35,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:35,596 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2025-02-07 17:06:35,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-02-07 17:06:35,596 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:35,596 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:35,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-07 17:06:35,797 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 [2025-02-07 17:06:35,797 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:35,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:35,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1177086871, now seen corresponding path program 9 times [2025-02-07 17:06:35,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:35,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752523463] [2025-02-07 17:06:35,798 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:06:35,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:35,803 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 34 statements into 3 equivalence classes. [2025-02-07 17:06:35,817 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 34 of 34 statements. [2025-02-07 17:06:35,817 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-07 17:06:35,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-02-07 17:06:35,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:35,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752523463] [2025-02-07 17:06:35,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752523463] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:35,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910957191] [2025-02-07 17:06:35,896 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:06:35,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:35,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:35,898 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:35,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-07 17:06:35,933 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 34 statements into 3 equivalence classes. [2025-02-07 17:06:35,952 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 34 of 34 statements. [2025-02-07 17:06:35,952 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-07 17:06:35,952 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:35,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-07 17:06:35,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-02-07 17:06:36,010 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-02-07 17:06:36,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910957191] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:36,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:36,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-02-07 17:06:36,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622109940] [2025-02-07 17:06:36,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:36,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-07 17:06:36,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:36,086 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-07 17:06:36,087 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2025-02-07 17:06:36,087 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:36,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:36,177 INFO L93 Difference]: Finished difference Result 86 states and 109 transitions. [2025-02-07 17:06:36,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 17:06:36,178 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2025-02-07 17:06:36,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:36,178 INFO L225 Difference]: With dead ends: 86 [2025-02-07 17:06:36,178 INFO L226 Difference]: Without dead ends: 45 [2025-02-07 17:06:36,179 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2025-02-07 17:06:36,179 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:36,179 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 20 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:36,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-02-07 17:06:36,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2025-02-07 17:06:36,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:36,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2025-02-07 17:06:36,184 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 34 [2025-02-07 17:06:36,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:36,184 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2025-02-07 17:06:36,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:36,184 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2025-02-07 17:06:36,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-07 17:06:36,184 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:36,184 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:36,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-07 17:06:36,385 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 [2025-02-07 17:06:36,385 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:36,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:36,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1679570516, now seen corresponding path program 10 times [2025-02-07 17:06:36,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:36,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634670135] [2025-02-07 17:06:36,386 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:06:36,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:36,390 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 39 statements into 2 equivalence classes. [2025-02-07 17:06:36,403 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 17:06:36,403 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:06:36,403 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:38,099 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 17:06:38,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:38,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634670135] [2025-02-07 17:06:38,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634670135] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:38,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162225781] [2025-02-07 17:06:38,099 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:06:38,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:38,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:38,101 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:38,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-07 17:06:38,139 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 39 statements into 2 equivalence classes. [2025-02-07 17:06:38,164 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 17:06:38,164 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:06:38,164 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:38,165 WARN L254 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 118 conjuncts are in the unsatisfiable core [2025-02-07 17:06:38,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:38,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:06:38,760 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:38,760 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:38,991 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 17:06:38,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162225781] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:38,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:38,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 18, 13] total 50 [2025-02-07 17:06:38,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918845302] [2025-02-07 17:06:38,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:38,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2025-02-07 17:06:38,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:38,993 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2025-02-07 17:06:38,994 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2283, Unknown=0, NotChecked=0, Total=2450 [2025-02-07 17:06:38,994 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 50 states, 50 states have (on average 1.96) internal successors, (98), 50 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:40,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:40,989 INFO L93 Difference]: Finished difference Result 117 states and 144 transitions. [2025-02-07 17:06:40,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-02-07 17:06:40,989 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.96) internal successors, (98), 50 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2025-02-07 17:06:40,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:40,990 INFO L225 Difference]: With dead ends: 117 [2025-02-07 17:06:40,990 INFO L226 Difference]: Without dead ends: 114 [2025-02-07 17:06:40,992 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1615 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=539, Invalid=6103, Unknown=0, NotChecked=0, Total=6642 [2025-02-07 17:06:40,993 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1737 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 2056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 1737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:40,993 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 60 Invalid, 2056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 1737 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-02-07 17:06:40,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2025-02-07 17:06:41,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 64. [2025-02-07 17:06:41,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 63 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:41,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2025-02-07 17:06:41,005 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 39 [2025-02-07 17:06:41,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:41,005 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2025-02-07 17:06:41,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.96) internal successors, (98), 50 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:41,006 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2025-02-07 17:06:41,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-02-07 17:06:41,006 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:41,006 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:41,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-07 17:06:41,210 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-07 17:06:41,210 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:41,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:41,210 INFO L85 PathProgramCache]: Analyzing trace with hash -527046697, now seen corresponding path program 11 times [2025-02-07 17:06:41,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:41,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653962064] [2025-02-07 17:06:41,210 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:06:41,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:41,216 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 40 statements into 4 equivalence classes. [2025-02-07 17:06:41,227 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 40 of 40 statements. [2025-02-07 17:06:41,227 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-07 17:06:41,227 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:41,316 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-02-07 17:06:41,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:41,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653962064] [2025-02-07 17:06:41,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653962064] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:41,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598663151] [2025-02-07 17:06:41,317 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:06:41,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:41,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:41,322 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:41,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-07 17:06:41,359 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 40 statements into 4 equivalence classes. [2025-02-07 17:06:41,398 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 40 of 40 statements. [2025-02-07 17:06:41,399 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-07 17:06:41,399 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:41,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 17:06:41,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:41,474 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-02-07 17:06:41,475 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-02-07 17:06:41,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598663151] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:41,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:41,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2025-02-07 17:06:41,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965285803] [2025-02-07 17:06:41,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:41,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-07 17:06:41,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:41,534 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-07 17:06:41,534 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2025-02-07 17:06:41,535 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:41,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:41,700 INFO L93 Difference]: Finished difference Result 127 states and 154 transitions. [2025-02-07 17:06:41,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-07 17:06:41,701 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2025-02-07 17:06:41,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:41,702 INFO L225 Difference]: With dead ends: 127 [2025-02-07 17:06:41,702 INFO L226 Difference]: Without dead ends: 59 [2025-02-07 17:06:41,703 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 70 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2025-02-07 17:06:41,704 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:41,704 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 28 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:41,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-02-07 17:06:41,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2025-02-07 17:06:41,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:41,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2025-02-07 17:06:41,716 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 40 [2025-02-07 17:06:41,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:41,716 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2025-02-07 17:06:41,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:41,716 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2025-02-07 17:06:41,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-02-07 17:06:41,717 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:41,717 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:41,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-07 17:06:41,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-02-07 17:06:41,918 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:41,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:41,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1077415369, now seen corresponding path program 12 times [2025-02-07 17:06:41,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:41,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425169016] [2025-02-07 17:06:41,918 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:06:41,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:41,925 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 42 statements into 4 equivalence classes. [2025-02-07 17:06:41,939 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 42 of 42 statements. [2025-02-07 17:06:41,939 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-02-07 17:06:41,939 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-02-07 17:06:42,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:42,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425169016] [2025-02-07 17:06:42,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425169016] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:42,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815177747] [2025-02-07 17:06:42,037 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:06:42,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:42,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:42,039 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:42,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-07 17:06:42,076 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 42 statements into 4 equivalence classes. [2025-02-07 17:06:42,097 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 42 of 42 statements. [2025-02-07 17:06:42,097 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-02-07 17:06:42,097 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:42,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 17:06:42,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-02-07 17:06:42,200 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:42,302 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-02-07 17:06:42,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815177747] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:42,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:42,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2025-02-07 17:06:42,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798923600] [2025-02-07 17:06:42,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:42,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-02-07 17:06:42,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:42,303 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-02-07 17:06:42,303 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2025-02-07 17:06:42,303 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:42,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:42,550 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2025-02-07 17:06:42,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-07 17:06:42,550 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2025-02-07 17:06:42,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:42,550 INFO L225 Difference]: With dead ends: 95 [2025-02-07 17:06:42,551 INFO L226 Difference]: Without dead ends: 47 [2025-02-07 17:06:42,551 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2025-02-07 17:06:42,551 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:42,552 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:06:42,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2025-02-07 17:06:42,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2025-02-07 17:06:42,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:42,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2025-02-07 17:06:42,560 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 42 [2025-02-07 17:06:42,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:42,560 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2025-02-07 17:06:42,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:42,560 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2025-02-07 17:06:42,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-02-07 17:06:42,560 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:42,561 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:42,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-07 17:06:42,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:42,761 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:42,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:42,762 INFO L85 PathProgramCache]: Analyzing trace with hash -937887721, now seen corresponding path program 13 times [2025-02-07 17:06:42,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:42,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336788126] [2025-02-07 17:06:42,762 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:06:42,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:42,767 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-02-07 17:06:42,802 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-02-07 17:06:42,803 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:42,803 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:45,355 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 3 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:45,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:45,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336788126] [2025-02-07 17:06:45,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336788126] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:45,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381427620] [2025-02-07 17:06:45,355 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:06:45,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:45,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:45,357 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:45,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-07 17:06:45,402 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-02-07 17:06:45,433 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-02-07 17:06:45,434 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:45,434 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:45,441 WARN L254 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 142 conjuncts are in the unsatisfiable core [2025-02-07 17:06:45,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:45,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:06:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:45,874 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:46,338 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 17:06:46,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381427620] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:46,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:46,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 21, 15] total 61 [2025-02-07 17:06:46,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001726638] [2025-02-07 17:06:46,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:46,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2025-02-07 17:06:46,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:46,339 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2025-02-07 17:06:46,340 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=3443, Unknown=0, NotChecked=0, Total=3660 [2025-02-07 17:06:46,340 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 61 states, 61 states have (on average 1.9672131147540983) internal successors, (120), 61 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:48,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:48,395 INFO L93 Difference]: Finished difference Result 121 states and 142 transitions. [2025-02-07 17:06:48,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-02-07 17:06:48,396 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9672131147540983) internal successors, (120), 61 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2025-02-07 17:06:48,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:48,397 INFO L225 Difference]: With dead ends: 121 [2025-02-07 17:06:48,397 INFO L226 Difference]: Without dead ends: 118 [2025-02-07 17:06:48,398 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1684 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=618, Invalid=7038, Unknown=0, NotChecked=0, Total=7656 [2025-02-07 17:06:48,399 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1915 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 2170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 1915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:48,399 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 80 Invalid, 2170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 1915 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-02-07 17:06:48,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2025-02-07 17:06:48,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 67. [2025-02-07 17:06:48,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 66 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:48,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2025-02-07 17:06:48,414 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 46 [2025-02-07 17:06:48,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:48,414 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2025-02-07 17:06:48,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9672131147540983) internal successors, (120), 61 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:48,414 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2025-02-07 17:06:48,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-02-07 17:06:48,415 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:48,415 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:48,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-07 17:06:48,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:48,619 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:48,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:48,619 INFO L85 PathProgramCache]: Analyzing trace with hash 990283468, now seen corresponding path program 14 times [2025-02-07 17:06:48,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:48,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941564708] [2025-02-07 17:06:48,619 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:06:48,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:48,625 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 47 statements into 2 equivalence classes. [2025-02-07 17:06:48,629 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-02-07 17:06:48,630 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:06:48,630 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:48,750 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-02-07 17:06:48,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:48,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941564708] [2025-02-07 17:06:48,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941564708] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:48,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384890835] [2025-02-07 17:06:48,750 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:06:48,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:48,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:48,753 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:48,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-07 17:06:48,795 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 47 statements into 2 equivalence classes. [2025-02-07 17:06:48,818 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-02-07 17:06:48,819 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:06:48,819 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:48,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 17:06:48,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-02-07 17:06:48,935 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-02-07 17:06:49,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384890835] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:49,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:49,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2025-02-07 17:06:49,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353242083] [2025-02-07 17:06:49,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:49,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-07 17:06:49,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:49,030 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-07 17:06:49,030 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2025-02-07 17:06:49,030 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:49,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:49,223 INFO L93 Difference]: Finished difference Result 158 states and 183 transitions. [2025-02-07 17:06:49,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-07 17:06:49,223 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2025-02-07 17:06:49,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:49,224 INFO L225 Difference]: With dead ends: 158 [2025-02-07 17:06:49,224 INFO L226 Difference]: Without dead ends: 68 [2025-02-07 17:06:49,224 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 75 SyntacticMatches, 11 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2025-02-07 17:06:49,224 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:49,224 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:06:49,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-02-07 17:06:49,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2025-02-07 17:06:49,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.164179104477612) internal successors, (78), 67 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:49,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2025-02-07 17:06:49,241 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 47 [2025-02-07 17:06:49,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:49,241 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2025-02-07 17:06:49,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:49,242 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2025-02-07 17:06:49,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-02-07 17:06:49,242 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:49,243 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:49,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-07 17:06:49,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-07 17:06:49,443 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:49,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:49,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1405324791, now seen corresponding path program 15 times [2025-02-07 17:06:49,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:49,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380691795] [2025-02-07 17:06:49,444 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:06:49,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:49,451 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 48 statements into 4 equivalence classes. [2025-02-07 17:06:49,465 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 48 of 48 statements. [2025-02-07 17:06:49,466 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 17:06:49,466 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:49,583 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2025-02-07 17:06:49,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:49,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380691795] [2025-02-07 17:06:49,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380691795] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:49,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088200416] [2025-02-07 17:06:49,583 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:06:49,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:49,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:49,586 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:49,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-07 17:06:49,630 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 48 statements into 4 equivalence classes. [2025-02-07 17:06:49,661 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 48 of 48 statements. [2025-02-07 17:06:49,661 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 17:06:49,661 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:49,662 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 17:06:49,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:49,739 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2025-02-07 17:06:49,740 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2025-02-07 17:06:49,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088200416] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:49,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:49,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2025-02-07 17:06:49,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144162236] [2025-02-07 17:06:49,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:49,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-07 17:06:49,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:49,819 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-07 17:06:49,819 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2025-02-07 17:06:49,819 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:49,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:49,935 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2025-02-07 17:06:49,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-07 17:06:49,935 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2025-02-07 17:06:49,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:49,936 INFO L225 Difference]: With dead ends: 107 [2025-02-07 17:06:49,936 INFO L226 Difference]: Without dead ends: 54 [2025-02-07 17:06:49,936 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 76 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2025-02-07 17:06:49,937 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:49,937 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 12 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:49,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-02-07 17:06:49,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2025-02-07 17:06:49,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:49,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2025-02-07 17:06:49,949 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 48 [2025-02-07 17:06:49,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:49,949 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2025-02-07 17:06:49,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:49,949 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2025-02-07 17:06:49,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-02-07 17:06:49,949 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:49,949 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:49,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-07 17:06:50,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-07 17:06:50,150 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:50,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:50,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1688431436, now seen corresponding path program 16 times [2025-02-07 17:06:50,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:50,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730767718] [2025-02-07 17:06:50,151 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:06:50,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:50,157 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 53 statements into 2 equivalence classes. [2025-02-07 17:06:50,172 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 53 of 53 statements. [2025-02-07 17:06:50,172 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:06:50,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 12 proven. 114 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 17:06:52,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:52,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730767718] [2025-02-07 17:06:52,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730767718] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:52,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041406986] [2025-02-07 17:06:52,859 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:06:52,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:52,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:52,865 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:52,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-07 17:06:52,907 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 53 statements into 2 equivalence classes. [2025-02-07 17:06:52,935 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 53 of 53 statements. [2025-02-07 17:06:52,935 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:06:52,935 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:52,938 WARN L254 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 167 conjuncts are in the unsatisfiable core [2025-02-07 17:06:52,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:53,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:06:53,970 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:53,970 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:54,467 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 17:06:54,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041406986] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:54,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:54,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 24, 17] total 70 [2025-02-07 17:06:54,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403833643] [2025-02-07 17:06:54,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:54,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2025-02-07 17:06:54,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:54,468 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2025-02-07 17:06:54,469 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=4559, Unknown=0, NotChecked=0, Total=4830 [2025-02-07 17:06:54,469 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 70 states, 70 states have (on average 1.9142857142857144) internal successors, (134), 70 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:58,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:58,093 INFO L93 Difference]: Finished difference Result 155 states and 182 transitions. [2025-02-07 17:06:58,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2025-02-07 17:06:58,094 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.9142857142857144) internal successors, (134), 70 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2025-02-07 17:06:58,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:58,095 INFO L225 Difference]: With dead ends: 155 [2025-02-07 17:06:58,095 INFO L226 Difference]: Without dead ends: 152 [2025-02-07 17:06:58,097 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3590 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=997, Invalid=12113, Unknown=0, NotChecked=0, Total=13110 [2025-02-07 17:06:58,097 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 3154 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 3572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 3154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:58,101 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 88 Invalid, 3572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 3154 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2025-02-07 17:06:58,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2025-02-07 17:06:58,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 86. [2025-02-07 17:06:58,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1647058823529413) internal successors, (99), 85 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:58,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2025-02-07 17:06:58,129 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 53 [2025-02-07 17:06:58,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:58,130 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2025-02-07 17:06:58,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.9142857142857144) internal successors, (134), 70 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:58,136 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2025-02-07 17:06:58,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-02-07 17:06:58,136 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:58,136 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:58,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-02-07 17:06:58,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-07 17:06:58,338 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:58,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:58,338 INFO L85 PathProgramCache]: Analyzing trace with hash 801798711, now seen corresponding path program 17 times [2025-02-07 17:06:58,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:58,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698821941] [2025-02-07 17:06:58,338 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:06:58,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:58,348 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 54 statements into 5 equivalence classes. [2025-02-07 17:06:58,367 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 54 of 54 statements. [2025-02-07 17:06:58,367 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-07 17:06:58,367 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:58,566 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-02-07 17:06:58,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:58,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698821941] [2025-02-07 17:06:58,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698821941] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:58,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021670127] [2025-02-07 17:06:58,570 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:06:58,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:58,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:58,573 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:58,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-07 17:06:58,620 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 54 statements into 5 equivalence classes. [2025-02-07 17:06:58,746 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 54 of 54 statements. [2025-02-07 17:06:58,746 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-07 17:06:58,747 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:58,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-07 17:06:58,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-02-07 17:06:58,861 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-02-07 17:06:58,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021670127] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:58,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:58,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 24 [2025-02-07 17:06:58,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342137267] [2025-02-07 17:06:58,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:58,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-07 17:06:58,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:58,949 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-07 17:06:58,949 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2025-02-07 17:06:58,949 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:59,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:59,191 INFO L93 Difference]: Finished difference Result 169 states and 196 transitions. [2025-02-07 17:06:59,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-07 17:06:59,192 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2025-02-07 17:06:59,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:59,193 INFO L225 Difference]: With dead ends: 169 [2025-02-07 17:06:59,193 INFO L226 Difference]: Without dead ends: 77 [2025-02-07 17:06:59,193 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 94 SyntacticMatches, 14 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=248, Invalid=682, Unknown=0, NotChecked=0, Total=930 [2025-02-07 17:06:59,193 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 23 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:59,194 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 37 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:06:59,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2025-02-07 17:06:59,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2025-02-07 17:06:59,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.125) internal successors, (81), 72 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:59,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2025-02-07 17:06:59,217 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 54 [2025-02-07 17:06:59,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:59,217 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2025-02-07 17:06:59,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:59,217 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2025-02-07 17:06:59,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-02-07 17:06:59,217 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:59,217 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:59,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-02-07 17:06:59,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:59,418 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:59,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:59,419 INFO L85 PathProgramCache]: Analyzing trace with hash -972741481, now seen corresponding path program 18 times [2025-02-07 17:06:59,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:59,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024962227] [2025-02-07 17:06:59,419 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:06:59,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:59,425 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 56 statements into 5 equivalence classes. [2025-02-07 17:06:59,436 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 56 of 56 statements. [2025-02-07 17:06:59,437 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-07 17:06:59,437 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:59,585 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2025-02-07 17:06:59,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:59,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024962227] [2025-02-07 17:06:59,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024962227] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:59,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737804021] [2025-02-07 17:06:59,586 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:06:59,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:59,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:59,591 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:59,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-07 17:06:59,644 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 56 statements into 5 equivalence classes. [2025-02-07 17:06:59,677 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 56 of 56 statements. [2025-02-07 17:06:59,677 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-07 17:06:59,677 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:59,679 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-07 17:06:59,681 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:59,876 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2025-02-07 17:06:59,876 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:00,056 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2025-02-07 17:07:00,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737804021] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:00,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:00,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 38 [2025-02-07 17:07:00,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040230450] [2025-02-07 17:07:00,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:00,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-02-07 17:07:00,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:00,058 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-02-07 17:07:00,058 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1198, Unknown=0, NotChecked=0, Total=1406 [2025-02-07 17:07:00,058 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand has 38 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 38 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:00,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:00,447 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2025-02-07 17:07:00,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-02-07 17:07:00,447 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 38 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2025-02-07 17:07:00,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:00,448 INFO L225 Difference]: With dead ends: 125 [2025-02-07 17:07:00,448 INFO L226 Difference]: Without dead ends: 61 [2025-02-07 17:07:00,449 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 82 SyntacticMatches, 8 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=399, Invalid=2253, Unknown=0, NotChecked=0, Total=2652 [2025-02-07 17:07:00,449 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:00,449 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:07:00,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-02-07 17:07:00,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2025-02-07 17:07:00,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:00,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2025-02-07 17:07:00,467 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 56 [2025-02-07 17:07:00,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:00,467 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2025-02-07 17:07:00,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 38 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:00,467 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2025-02-07 17:07:00,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-02-07 17:07:00,468 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:00,468 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:00,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-02-07 17:07:00,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:00,669 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:00,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:00,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1528700297, now seen corresponding path program 19 times [2025-02-07 17:07:00,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:00,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649447236] [2025-02-07 17:07:00,669 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:07:00,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:00,675 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-02-07 17:07:00,741 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-02-07 17:07:00,741 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:07:00,741 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:04,784 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 6 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:07:04,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:04,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649447236] [2025-02-07 17:07:04,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649447236] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:04,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615518638] [2025-02-07 17:07:04,785 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:07:04,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:04,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:04,787 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:04,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-07 17:07:04,836 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-02-07 17:07:04,871 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-02-07 17:07:04,872 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:07:04,872 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:04,878 WARN L254 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 194 conjuncts are in the unsatisfiable core [2025-02-07 17:07:04,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:04,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:07:05,178 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:07:05,178 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-07 17:07:06,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615518638] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:06,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:06,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 27, 19] total 70 [2025-02-07 17:07:06,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570191789] [2025-02-07 17:07:06,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:06,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2025-02-07 17:07:06,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:06,031 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2025-02-07 17:07:06,032 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=4518, Unknown=0, NotChecked=0, Total=4830 [2025-02-07 17:07:06,032 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 70 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:08,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:08,487 INFO L93 Difference]: Finished difference Result 181 states and 205 transitions. [2025-02-07 17:07:08,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2025-02-07 17:07:08,488 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2025-02-07 17:07:08,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:08,489 INFO L225 Difference]: With dead ends: 181 [2025-02-07 17:07:08,489 INFO L226 Difference]: Without dead ends: 178 [2025-02-07 17:07:08,491 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2330 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=805, Invalid=9295, Unknown=0, NotChecked=0, Total=10100 [2025-02-07 17:07:08,492 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 2816 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 3069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 2816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:08,492 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 92 Invalid, 3069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 2816 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-02-07 17:07:08,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2025-02-07 17:07:08,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 104. [2025-02-07 17:07:08,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 103 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:08,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2025-02-07 17:07:08,528 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 60 [2025-02-07 17:07:08,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:08,528 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2025-02-07 17:07:08,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:08,528 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2025-02-07 17:07:08,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-02-07 17:07:08,529 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:08,529 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:08,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-02-07 17:07:08,729 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:08,730 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:08,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:08,730 INFO L85 PathProgramCache]: Analyzing trace with hash -145037204, now seen corresponding path program 20 times [2025-02-07 17:07:08,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:08,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036957333] [2025-02-07 17:07:08,730 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:07:08,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:08,737 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 61 statements into 2 equivalence classes. [2025-02-07 17:07:08,743 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 61 of 61 statements. [2025-02-07 17:07:08,743 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:07:08,743 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2025-02-07 17:07:08,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:08,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036957333] [2025-02-07 17:07:08,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036957333] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:08,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424962985] [2025-02-07 17:07:08,924 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:07:08,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:08,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:08,926 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:08,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-07 17:07:08,975 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 61 statements into 2 equivalence classes. [2025-02-07 17:07:09,003 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 61 of 61 statements. [2025-02-07 17:07:09,003 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:07:09,003 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:09,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-07 17:07:09,005 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2025-02-07 17:07:09,158 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2025-02-07 17:07:09,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424962985] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:09,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:09,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2025-02-07 17:07:09,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467826043] [2025-02-07 17:07:09,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:09,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-07 17:07:09,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:09,286 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-07 17:07:09,286 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2025-02-07 17:07:09,286 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 29 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:09,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:09,484 INFO L93 Difference]: Finished difference Result 224 states and 253 transitions. [2025-02-07 17:07:09,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-07 17:07:09,487 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2025-02-07 17:07:09,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:09,488 INFO L225 Difference]: With dead ends: 224 [2025-02-07 17:07:09,488 INFO L226 Difference]: Without dead ends: 105 [2025-02-07 17:07:09,488 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 97 SyntacticMatches, 15 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2025-02-07 17:07:09,489 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:09,489 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:07:09,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2025-02-07 17:07:09,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2025-02-07 17:07:09,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1346153846153846) internal successors, (118), 104 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:09,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 118 transitions. [2025-02-07 17:07:09,529 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 118 transitions. Word has length 61 [2025-02-07 17:07:09,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:09,532 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 118 transitions. [2025-02-07 17:07:09,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:09,533 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 118 transitions. [2025-02-07 17:07:09,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-02-07 17:07:09,533 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:09,533 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:09,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-02-07 17:07:09,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:09,734 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:09,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:09,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1726314409, now seen corresponding path program 21 times [2025-02-07 17:07:09,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:09,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109974537] [2025-02-07 17:07:09,734 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:07:09,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:09,741 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 62 statements into 5 equivalence classes. [2025-02-07 17:07:09,767 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 62 of 62 statements. [2025-02-07 17:07:09,771 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-07 17:07:09,771 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2025-02-07 17:07:09,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:09,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109974537] [2025-02-07 17:07:09,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109974537] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:09,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966364724] [2025-02-07 17:07:09,996 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:07:09,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:09,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:09,998 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:09,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-02-07 17:07:10,053 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 62 statements into 5 equivalence classes. [2025-02-07 17:07:10,096 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 62 of 62 statements. [2025-02-07 17:07:10,096 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-07 17:07:10,096 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:10,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-07 17:07:10,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:10,217 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2025-02-07 17:07:10,217 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2025-02-07 17:07:10,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966364724] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:10,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:10,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2025-02-07 17:07:10,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427864267] [2025-02-07 17:07:10,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:10,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-07 17:07:10,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:10,335 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-07 17:07:10,335 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2025-02-07 17:07:10,335 INFO L87 Difference]: Start difference. First operand 105 states and 118 transitions. Second operand has 29 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:10,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:10,481 INFO L93 Difference]: Finished difference Result 145 states and 166 transitions. [2025-02-07 17:07:10,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-07 17:07:10,482 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2025-02-07 17:07:10,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:10,482 INFO L225 Difference]: With dead ends: 145 [2025-02-07 17:07:10,482 INFO L226 Difference]: Without dead ends: 68 [2025-02-07 17:07:10,483 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 98 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2025-02-07 17:07:10,483 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 45 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:10,483 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 20 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:07:10,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-02-07 17:07:10,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2025-02-07 17:07:10,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 67 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:10,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2025-02-07 17:07:10,507 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 62 [2025-02-07 17:07:10,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:10,507 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2025-02-07 17:07:10,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:10,507 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2025-02-07 17:07:10,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2025-02-07 17:07:10,508 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:10,508 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:10,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-02-07 17:07:10,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-02-07 17:07:10,709 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:10,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:10,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1285010668, now seen corresponding path program 22 times [2025-02-07 17:07:10,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:10,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165973717] [2025-02-07 17:07:10,709 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:07:10,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:10,716 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 67 statements into 2 equivalence classes. [2025-02-07 17:07:10,737 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 67 of 67 statements. [2025-02-07 17:07:10,737 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:07:10,737 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:14,895 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 15 proven. 201 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 17:07:14,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:14,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165973717] [2025-02-07 17:07:14,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165973717] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:14,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104369869] [2025-02-07 17:07:14,896 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:07:14,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:14,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:14,899 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:14,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-02-07 17:07:14,952 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 67 statements into 2 equivalence classes. [2025-02-07 17:07:14,990 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 67 of 67 statements. [2025-02-07 17:07:14,991 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:07:14,991 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:14,994 WARN L254 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 219 conjuncts are in the unsatisfiable core [2025-02-07 17:07:14,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:15,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:07:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:07:16,617 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:17,430 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 17:07:17,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104369869] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:17,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:17,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 30, 21] total 84 [2025-02-07 17:07:17,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623108958] [2025-02-07 17:07:17,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:17,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2025-02-07 17:07:17,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:17,431 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2025-02-07 17:07:17,433 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=6652, Unknown=0, NotChecked=0, Total=6972 [2025-02-07 17:07:17,433 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 84 states, 84 states have (on average 2.0238095238095237) internal successors, (170), 84 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:22,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:22,425 INFO L93 Difference]: Finished difference Result 192 states and 214 transitions. [2025-02-07 17:07:22,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2025-02-07 17:07:22,425 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0238095238095237) internal successors, (170), 84 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2025-02-07 17:07:22,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:22,426 INFO L225 Difference]: With dead ends: 192 [2025-02-07 17:07:22,430 INFO L226 Difference]: Without dead ends: 189 [2025-02-07 17:07:22,432 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5473 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1663, Invalid=19507, Unknown=0, NotChecked=0, Total=21170 [2025-02-07 17:07:22,432 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3324 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 3747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 3324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:22,432 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 101 Invalid, 3747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 3324 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2025-02-07 17:07:22,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2025-02-07 17:07:22,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 106. [2025-02-07 17:07:22,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.1142857142857143) internal successors, (117), 105 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:22,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2025-02-07 17:07:22,495 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 67 [2025-02-07 17:07:22,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:22,495 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2025-02-07 17:07:22,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0238095238095237) internal successors, (170), 84 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:22,495 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2025-02-07 17:07:22,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2025-02-07 17:07:22,496 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:22,496 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:22,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-02-07 17:07:22,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-02-07 17:07:22,700 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:22,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:22,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1180656791, now seen corresponding path program 23 times [2025-02-07 17:07:22,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:22,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438692480] [2025-02-07 17:07:22,701 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:07:22,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:22,709 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 68 statements into 6 equivalence classes. [2025-02-07 17:07:22,723 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 68 of 68 statements. [2025-02-07 17:07:22,723 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-07 17:07:22,723 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:22,888 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2025-02-07 17:07:22,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:22,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438692480] [2025-02-07 17:07:22,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438692480] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:22,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79668811] [2025-02-07 17:07:22,888 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:07:22,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:22,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:22,890 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:22,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-02-07 17:07:22,958 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 68 statements into 6 equivalence classes. [2025-02-07 17:07:23,175 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 68 of 68 statements. [2025-02-07 17:07:23,176 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-07 17:07:23,176 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:23,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-07 17:07:23,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:23,344 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2025-02-07 17:07:23,344 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:23,485 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2025-02-07 17:07:23,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79668811] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:23,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:23,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 30 [2025-02-07 17:07:23,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869130702] [2025-02-07 17:07:23,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:23,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-07 17:07:23,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:23,486 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-07 17:07:23,486 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2025-02-07 17:07:23,486 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:23,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:23,803 INFO L93 Difference]: Finished difference Result 218 states and 244 transitions. [2025-02-07 17:07:23,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-07 17:07:23,803 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2025-02-07 17:07:23,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:23,805 INFO L225 Difference]: With dead ends: 218 [2025-02-07 17:07:23,805 INFO L226 Difference]: Without dead ends: 113 [2025-02-07 17:07:23,806 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 109 SyntacticMatches, 18 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=381, Invalid=1101, Unknown=0, NotChecked=0, Total=1482 [2025-02-07 17:07:23,806 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:23,806 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:07:23,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2025-02-07 17:07:23,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2025-02-07 17:07:23,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1018518518518519) internal successors, (119), 108 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:23,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2025-02-07 17:07:23,850 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 68 [2025-02-07 17:07:23,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:23,850 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2025-02-07 17:07:23,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:23,850 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2025-02-07 17:07:23,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2025-02-07 17:07:23,851 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:23,851 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:23,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-02-07 17:07:24,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-02-07 17:07:24,052 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:24,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:24,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1052465271, now seen corresponding path program 24 times [2025-02-07 17:07:24,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:24,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806962712] [2025-02-07 17:07:24,052 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:07:24,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:24,059 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 68 statements into 6 equivalence classes. [2025-02-07 17:07:24,075 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 68 of 68 statements. [2025-02-07 17:07:24,075 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-02-07 17:07:24,075 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:24,244 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2025-02-07 17:07:24,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:24,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806962712] [2025-02-07 17:07:24,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806962712] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:24,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132520617] [2025-02-07 17:07:24,244 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:07:24,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:24,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:24,246 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:24,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-02-07 17:07:24,307 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 68 statements into 6 equivalence classes. [2025-02-07 17:07:24,464 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 68 of 68 statements. [2025-02-07 17:07:24,464 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-02-07 17:07:24,464 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:24,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-07 17:07:24,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:24,577 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2025-02-07 17:07:24,577 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2025-02-07 17:07:24,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132520617] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:24,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:24,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2025-02-07 17:07:24,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112093780] [2025-02-07 17:07:24,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:24,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-07 17:07:24,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:24,703 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-07 17:07:24,703 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2025-02-07 17:07:24,707 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:24,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:24,942 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2025-02-07 17:07:24,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-07 17:07:24,943 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2025-02-07 17:07:24,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:24,943 INFO L225 Difference]: With dead ends: 113 [2025-02-07 17:07:24,943 INFO L226 Difference]: Without dead ends: 74 [2025-02-07 17:07:24,944 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 107 SyntacticMatches, 18 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=398, Invalid=1242, Unknown=0, NotChecked=0, Total=1640 [2025-02-07 17:07:24,944 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 32 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:24,944 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 28 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:07:24,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2025-02-07 17:07:24,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2025-02-07 17:07:24,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.095890410958904) internal successors, (80), 73 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:24,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2025-02-07 17:07:24,987 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 68 [2025-02-07 17:07:24,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:24,987 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2025-02-07 17:07:24,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:24,987 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2025-02-07 17:07:24,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2025-02-07 17:07:24,987 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:24,987 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:24,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2025-02-07 17:07:25,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-02-07 17:07:25,188 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:25,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:25,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1899426452, now seen corresponding path program 25 times [2025-02-07 17:07:25,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:25,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893535972] [2025-02-07 17:07:25,189 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:07:25,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:25,197 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 73 statements into 1 equivalence classes. [2025-02-07 17:07:25,204 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 73 of 73 statements. [2025-02-07 17:07:25,204 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:07:25,204 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:25,393 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2025-02-07 17:07:25,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:25,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893535972] [2025-02-07 17:07:25,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893535972] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:25,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978741922] [2025-02-07 17:07:25,394 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:07:25,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:25,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:25,396 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:25,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-02-07 17:07:25,457 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 73 statements into 1 equivalence classes. [2025-02-07 17:07:25,490 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 73 of 73 statements. [2025-02-07 17:07:25,490 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:07:25,490 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:25,492 INFO L256 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-07 17:07:25,493 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:25,623 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2025-02-07 17:07:25,623 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:25,726 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2025-02-07 17:07:25,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978741922] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:25,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:25,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 31 [2025-02-07 17:07:25,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239366610] [2025-02-07 17:07:25,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:25,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-02-07 17:07:25,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:25,728 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-02-07 17:07:25,728 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2025-02-07 17:07:25,728 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:25,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:25,807 INFO L93 Difference]: Finished difference Result 138 states and 150 transitions. [2025-02-07 17:07:25,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-07 17:07:25,807 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2025-02-07 17:07:25,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:25,808 INFO L225 Difference]: With dead ends: 138 [2025-02-07 17:07:25,808 INFO L226 Difference]: Without dead ends: 75 [2025-02-07 17:07:25,808 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 119 SyntacticMatches, 16 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2025-02-07 17:07:25,808 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:25,809 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:07:25,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2025-02-07 17:07:25,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2025-02-07 17:07:25,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0945945945945945) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:25,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2025-02-07 17:07:25,838 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 73 [2025-02-07 17:07:25,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:25,839 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2025-02-07 17:07:25,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:25,839 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2025-02-07 17:07:25,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2025-02-07 17:07:25,839 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:25,839 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:25,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2025-02-07 17:07:26,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-02-07 17:07:26,043 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:26,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:26,043 INFO L85 PathProgramCache]: Analyzing trace with hash -581360425, now seen corresponding path program 26 times [2025-02-07 17:07:26,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:26,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644687839] [2025-02-07 17:07:26,043 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:07:26,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:26,050 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 74 statements into 2 equivalence classes. [2025-02-07 17:07:26,090 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 74 of 74 statements. [2025-02-07 17:07:26,090 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:07:26,090 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:32,036 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:07:32,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:32,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644687839] [2025-02-07 17:07:32,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644687839] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:32,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678621106] [2025-02-07 17:07:32,037 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:07:32,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:32,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:32,039 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:32,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-02-07 17:07:32,111 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 74 statements into 2 equivalence classes. [2025-02-07 17:07:32,159 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 74 of 74 statements. [2025-02-07 17:07:32,160 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:07:32,160 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:32,164 WARN L254 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 243 conjuncts are in the unsatisfiable core [2025-02-07 17:07:32,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:32,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:07:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:07:32,668 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:34,175 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-07 17:07:34,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678621106] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:34,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:34,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 33, 23] total 88 [2025-02-07 17:07:34,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897536516] [2025-02-07 17:07:34,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:34,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2025-02-07 17:07:34,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:34,177 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2025-02-07 17:07:34,178 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=476, Invalid=7180, Unknown=0, NotChecked=0, Total=7656 [2025-02-07 17:07:34,178 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 88 states, 88 states have (on average 2.022727272727273) internal successors, (178), 88 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:39,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:39,816 INFO L93 Difference]: Finished difference Result 261 states and 305 transitions. [2025-02-07 17:07:39,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2025-02-07 17:07:39,817 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.022727272727273) internal successors, (178), 88 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2025-02-07 17:07:39,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:39,821 INFO L225 Difference]: With dead ends: 261 [2025-02-07 17:07:39,821 INFO L226 Difference]: Without dead ends: 258 [2025-02-07 17:07:39,822 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5014 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1949, Invalid=18357, Unknown=0, NotChecked=0, Total=20306 [2025-02-07 17:07:39,822 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 3720 mSolverCounterSat, 904 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 4624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 904 IncrementalHoareTripleChecker+Valid, 3720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:39,823 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 103 Invalid, 4624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [904 Valid, 3720 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2025-02-07 17:07:39,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2025-02-07 17:07:39,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 203. [2025-02-07 17:07:39,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.1732673267326732) internal successors, (237), 202 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:39,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 237 transitions. [2025-02-07 17:07:39,910 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 237 transitions. Word has length 74 [2025-02-07 17:07:39,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:39,910 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 237 transitions. [2025-02-07 17:07:39,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.022727272727273) internal successors, (178), 88 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:39,910 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 237 transitions. [2025-02-07 17:07:39,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2025-02-07 17:07:39,911 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:39,911 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:39,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2025-02-07 17:07:40,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-02-07 17:07:40,112 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:40,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:40,112 INFO L85 PathProgramCache]: Analyzing trace with hash -842272244, now seen corresponding path program 27 times [2025-02-07 17:07:40,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:40,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668692604] [2025-02-07 17:07:40,112 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:07:40,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:40,119 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 75 statements into 6 equivalence classes. [2025-02-07 17:07:40,164 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 75 of 75 statements. [2025-02-07 17:07:40,164 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-07 17:07:40,164 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:40,374 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 46 proven. 54 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2025-02-07 17:07:40,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:40,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668692604] [2025-02-07 17:07:40,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668692604] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:40,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996404932] [2025-02-07 17:07:40,374 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:07:40,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:40,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:40,377 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:40,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-02-07 17:07:40,439 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 75 statements into 6 equivalence classes. [2025-02-07 17:07:40,501 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 75 of 75 statements. [2025-02-07 17:07:40,501 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-07 17:07:40,501 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:40,503 INFO L256 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-07 17:07:40,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2025-02-07 17:07:40,701 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:40,870 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2025-02-07 17:07:40,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996404932] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:40,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:40,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2025-02-07 17:07:40,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523571090] [2025-02-07 17:07:40,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:40,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-02-07 17:07:40,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:40,872 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-02-07 17:07:40,872 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2025-02-07 17:07:40,872 INFO L87 Difference]: Start difference. First operand 203 states and 237 transitions. Second operand has 35 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 35 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:41,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:41,340 INFO L93 Difference]: Finished difference Result 368 states and 423 transitions. [2025-02-07 17:07:41,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-07 17:07:41,341 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 35 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2025-02-07 17:07:41,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:41,345 INFO L225 Difference]: With dead ends: 368 [2025-02-07 17:07:41,345 INFO L226 Difference]: Without dead ends: 172 [2025-02-07 17:07:41,346 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 119 SyntacticMatches, 19 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=471, Invalid=1421, Unknown=0, NotChecked=0, Total=1892 [2025-02-07 17:07:41,346 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:41,346 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 30 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 17:07:41,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2025-02-07 17:07:41,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 148. [2025-02-07 17:07:41,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.129251700680272) internal successors, (166), 147 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:41,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 166 transitions. [2025-02-07 17:07:41,437 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 166 transitions. Word has length 75 [2025-02-07 17:07:41,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:41,437 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 166 transitions. [2025-02-07 17:07:41,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 35 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:41,437 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 166 transitions. [2025-02-07 17:07:41,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2025-02-07 17:07:41,438 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:41,438 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:41,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-02-07 17:07:41,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-02-07 17:07:41,638 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:41,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:41,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1716301655, now seen corresponding path program 28 times [2025-02-07 17:07:41,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:41,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828641019] [2025-02-07 17:07:41,640 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:07:41,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:41,647 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 76 statements into 2 equivalence classes. [2025-02-07 17:07:41,653 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 65 of 76 statements. [2025-02-07 17:07:41,653 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:07:41,653 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2025-02-07 17:07:41,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:41,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828641019] [2025-02-07 17:07:41,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828641019] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:41,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977221273] [2025-02-07 17:07:41,875 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:07:41,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:41,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:41,877 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:41,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-02-07 17:07:41,950 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 76 statements into 2 equivalence classes. [2025-02-07 17:07:41,987 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 65 of 76 statements. [2025-02-07 17:07:41,987 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:07:41,987 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:41,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-07 17:07:41,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:42,165 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2025-02-07 17:07:42,165 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:42,325 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2025-02-07 17:07:42,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977221273] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:42,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:42,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 33 [2025-02-07 17:07:42,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805046904] [2025-02-07 17:07:42,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:42,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-02-07 17:07:42,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:42,325 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-02-07 17:07:42,326 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2025-02-07 17:07:42,326 INFO L87 Difference]: Start difference. First operand 148 states and 166 transitions. Second operand has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:42,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:42,676 INFO L93 Difference]: Finished difference Result 152 states and 170 transitions. [2025-02-07 17:07:42,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-07 17:07:42,677 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2025-02-07 17:07:42,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:42,678 INFO L225 Difference]: With dead ends: 152 [2025-02-07 17:07:42,678 INFO L226 Difference]: Without dead ends: 109 [2025-02-07 17:07:42,679 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 121 SyntacticMatches, 21 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=472, Invalid=1420, Unknown=0, NotChecked=0, Total=1892 [2025-02-07 17:07:42,679 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:42,679 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:07:42,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2025-02-07 17:07:42,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 81. [2025-02-07 17:07:42,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.0875) internal successors, (87), 80 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:42,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2025-02-07 17:07:42,718 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 76 [2025-02-07 17:07:42,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:42,718 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2025-02-07 17:07:42,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:42,718 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2025-02-07 17:07:42,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2025-02-07 17:07:42,719 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:42,719 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:42,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-02-07 17:07:42,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:42,923 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:42,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:42,923 INFO L85 PathProgramCache]: Analyzing trace with hash 870636631, now seen corresponding path program 29 times [2025-02-07 17:07:42,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:42,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330173687] [2025-02-07 17:07:42,924 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:07:42,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:42,932 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 80 statements into 6 equivalence classes. [2025-02-07 17:07:42,959 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 80 of 80 statements. [2025-02-07 17:07:42,960 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-07 17:07:42,960 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:43,194 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2025-02-07 17:07:43,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:43,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330173687] [2025-02-07 17:07:43,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330173687] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:43,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8842234] [2025-02-07 17:07:43,195 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:07:43,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:43,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:43,200 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:43,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-02-07 17:07:43,268 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 80 statements into 6 equivalence classes. [2025-02-07 17:07:43,862 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 80 of 80 statements. [2025-02-07 17:07:43,862 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-07 17:07:43,862 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:43,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-07 17:07:43,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2025-02-07 17:07:44,046 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:44,179 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2025-02-07 17:07:44,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8842234] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:44,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:44,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 33 [2025-02-07 17:07:44,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182934970] [2025-02-07 17:07:44,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:44,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-02-07 17:07:44,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:44,181 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-02-07 17:07:44,181 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2025-02-07 17:07:44,181 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:44,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:44,286 INFO L93 Difference]: Finished difference Result 151 states and 163 transitions. [2025-02-07 17:07:44,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-07 17:07:44,286 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2025-02-07 17:07:44,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:44,287 INFO L225 Difference]: With dead ends: 151 [2025-02-07 17:07:44,287 INFO L226 Difference]: Without dead ends: 82 [2025-02-07 17:07:44,287 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 130 SyntacticMatches, 20 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2025-02-07 17:07:44,288 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:44,288 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:07:44,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-02-07 17:07:44,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2025-02-07 17:07:44,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0864197530864197) internal successors, (88), 81 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:44,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2025-02-07 17:07:44,326 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 80 [2025-02-07 17:07:44,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:44,326 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2025-02-07 17:07:44,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:44,326 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2025-02-07 17:07:44,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2025-02-07 17:07:44,326 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:44,326 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:44,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-02-07 17:07:44,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:44,527 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:44,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:44,528 INFO L85 PathProgramCache]: Analyzing trace with hash 159032972, now seen corresponding path program 30 times [2025-02-07 17:07:44,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:44,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664537534] [2025-02-07 17:07:44,528 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:07:44,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:44,537 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 81 statements into 6 equivalence classes. [2025-02-07 17:07:44,630 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 81 of 81 statements. [2025-02-07 17:07:44,630 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-02-07 17:07:44,630 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:51,882 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:07:51,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:51,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664537534] [2025-02-07 17:07:51,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664537534] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:51,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053196489] [2025-02-07 17:07:51,882 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:07:51,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:51,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:51,884 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:51,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-02-07 17:07:51,957 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 81 statements into 6 equivalence classes. [2025-02-07 17:07:52,133 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 81 of 81 statements. [2025-02-07 17:07:52,133 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-02-07 17:07:52,133 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:52,138 WARN L254 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 281 conjuncts are in the unsatisfiable core [2025-02-07 17:07:52,142 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:52,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:07:54,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:54,565 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:07:54,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2025-02-07 17:07:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:07:54,685 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:56,802 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-07 17:07:56,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053196489] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:56,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:56,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 37, 27] total 120 [2025-02-07 17:07:56,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580892918] [2025-02-07 17:07:56,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:56,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2025-02-07 17:07:56,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:56,803 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2025-02-07 17:07:56,804 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=12950, Unknown=0, NotChecked=0, Total=14280 [2025-02-07 17:07:56,804 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand has 120 states, 120 states have (on average 1.8583333333333334) internal successors, (223), 120 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)