./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_const_m3.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_sum_const_m3.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 bd654f01b412711828f8177df5f8f7c2933e3d7436939e6c61fdcced19c9515c --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 17:07:34,770 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 17:07:34,830 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 17:07:34,835 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 17:07:34,838 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 17:07:34,867 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 17:07:34,868 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 17:07:34,868 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 17:07:34,869 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 17:07:34,869 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 17:07:34,870 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 17:07:34,870 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 17:07:34,870 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 17:07:34,870 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 17:07:34,870 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 17:07:34,871 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 17:07:34,871 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 17:07:34,871 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 17:07:34,871 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 17:07:34,871 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 17:07:34,871 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 17:07:34,872 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 17:07:34,872 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 17:07:34,872 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 17:07:34,872 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 17:07:34,872 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 17:07:34,872 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 17:07:34,872 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 17:07:34,872 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 17:07:34,872 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 17:07:34,873 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 17:07:34,873 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 17:07:34,873 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 17:07:34,873 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 17:07:34,874 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 17:07:34,874 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 17:07:34,874 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 17:07:34,874 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 17:07:34,874 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 17:07:34,874 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 17:07:34,874 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 17:07:34,874 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 17:07:34,874 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 17:07:34,875 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 -> bd654f01b412711828f8177df5f8f7c2933e3d7436939e6c61fdcced19c9515c [2025-02-07 17:07:35,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 17:07:35,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 17:07:35,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 17:07:35,125 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 17:07:35,125 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 17:07:35,126 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const_m3.c [2025-02-07 17:07:36,314 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/1d6f67e0d/5d738fde5912482e9b1b7eeac7c19f67/FLAG2ce8da529 [2025-02-07 17:07:36,583 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 17:07:36,584 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const_m3.c [2025-02-07 17:07:36,591 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/1d6f67e0d/5d738fde5912482e9b1b7eeac7c19f67/FLAG2ce8da529 [2025-02-07 17:07:36,904 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/1d6f67e0d/5d738fde5912482e9b1b7eeac7c19f67 [2025-02-07 17:07:36,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 17:07:36,907 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 17:07:36,908 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 17:07:36,908 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 17:07:36,911 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 17:07:36,912 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 05:07:36" (1/1) ... [2025-02-07 17:07:36,912 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a04f2d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:07:36, skipping insertion in model container [2025-02-07 17:07:36,912 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 05:07:36" (1/1) ... [2025-02-07 17:07:36,926 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 17:07:37,050 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_sum_const_m3.c[408,421] [2025-02-07 17:07:37,072 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 17:07:37,084 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 17:07:37,092 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_sum_const_m3.c[408,421] [2025-02-07 17:07:37,104 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 17:07:37,115 INFO L204 MainTranslator]: Completed translation [2025-02-07 17:07:37,117 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:07:37 WrapperNode [2025-02-07 17:07:37,117 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 17:07:37,118 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 17:07:37,118 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 17:07:37,118 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 17:07:37,124 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:07:37" (1/1) ... [2025-02-07 17:07:37,129 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:07:37" (1/1) ... [2025-02-07 17:07:37,146 INFO L138 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2025-02-07 17:07:37,146 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 17:07:37,147 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 17:07:37,147 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 17:07:37,147 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 17:07:37,154 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:07:37" (1/1) ... [2025-02-07 17:07:37,155 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:07:37" (1/1) ... [2025-02-07 17:07:37,157 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:07:37" (1/1) ... [2025-02-07 17:07:37,179 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 17:07:37,179 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:07:37" (1/1) ... [2025-02-07 17:07:37,180 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:07:37" (1/1) ... [2025-02-07 17:07:37,185 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:07:37" (1/1) ... [2025-02-07 17:07:37,190 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:07:37" (1/1) ... [2025-02-07 17:07:37,190 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:07:37" (1/1) ... [2025-02-07 17:07:37,191 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:07:37" (1/1) ... [2025-02-07 17:07:37,192 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 17:07:37,193 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 17:07:37,196 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 17:07:37,197 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 17:07:37,198 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:07:37" (1/1) ... [2025-02-07 17:07:37,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 17:07:37,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:37,229 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 17:07:37,232 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 17:07:37,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 17:07:37,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 17:07:37,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-07 17:07:37,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-07 17:07:37,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-07 17:07:37,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-07 17:07:37,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 17:07:37,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 17:07:37,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-07 17:07:37,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-07 17:07:37,316 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 17:07:37,318 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 17:07:37,509 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-02-07 17:07:37,509 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 17:07:37,516 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 17:07:37,516 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 17:07:37,516 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 05:07:37 BoogieIcfgContainer [2025-02-07 17:07:37,516 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 17:07:37,519 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 17:07:37,519 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 17:07:37,523 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 17:07:37,523 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 05:07:36" (1/3) ... [2025-02-07 17:07:37,523 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70480c77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 05:07:37, skipping insertion in model container [2025-02-07 17:07:37,523 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:07:37" (2/3) ... [2025-02-07 17:07:37,524 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70480c77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 05:07:37, skipping insertion in model container [2025-02-07 17:07:37,524 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 05:07:37" (3/3) ... [2025-02-07 17:07:37,525 INFO L128 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m3.c [2025-02-07 17:07:37,538 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 17:07:37,540 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG zero_sum_const_m3.c that has 1 procedures, 16 locations, 1 initial locations, 7 loop locations, and 1 error locations. [2025-02-07 17:07:37,587 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 17:07:37,598 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;@3ad1378b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 17:07:37,598 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 17:07:37,603 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 17:07:37,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-02-07 17:07:37,607 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:37,607 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:37,608 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:37,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:37,613 INFO L85 PathProgramCache]: Analyzing trace with hash -845513108, now seen corresponding path program 1 times [2025-02-07 17:07:37,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:37,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647695920] [2025-02-07 17:07:37,620 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:07:37,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:37,676 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-07 17:07:37,696 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-07 17:07:37,696 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:07:37,696 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:37,849 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 17:07:37,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:37,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647695920] [2025-02-07 17:07:37,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647695920] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 17:07:37,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 17:07:37,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-07 17:07:37,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677030802] [2025-02-07 17:07:37,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 17:07:37,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-07 17:07:37,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:37,872 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-07 17:07:37,872 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 17:07:37,875 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 17:07:37,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:37,938 INFO L93 Difference]: Finished difference Result 30 states and 45 transitions. [2025-02-07 17:07:37,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-07 17:07:37,941 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 17:07:37,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:37,948 INFO L225 Difference]: With dead ends: 30 [2025-02-07 17:07:37,949 INFO L226 Difference]: Without dead ends: 13 [2025-02-07 17:07:37,952 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 17:07:37,956 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:37,956 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:07:37,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2025-02-07 17:07:37,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2025-02-07 17:07:37,977 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 17:07:37,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 19 transitions. [2025-02-07 17:07:37,983 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 19 transitions. Word has length 11 [2025-02-07 17:07:37,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:37,983 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 19 transitions. [2025-02-07 17:07:37,983 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 17:07:37,983 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 19 transitions. [2025-02-07 17:07:37,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-02-07 17:07:37,984 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:37,984 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:37,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 17:07:37,985 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:37,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:37,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1067269911, now seen corresponding path program 1 times [2025-02-07 17:07:37,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:37,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718284069] [2025-02-07 17:07:37,986 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:07:37,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:38,001 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-07 17:07:38,012 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-07 17:07:38,015 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:07:38,015 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:38,107 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 17:07:38,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:38,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718284069] [2025-02-07 17:07:38,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718284069] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 17:07:38,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 17:07:38,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-07 17:07:38,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093677716] [2025-02-07 17:07:38,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 17:07:38,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-07 17:07:38,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:38,111 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-07 17:07:38,111 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-07 17:07:38,111 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 17:07:38,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:38,175 INFO L93 Difference]: Finished difference Result 27 states and 43 transitions. [2025-02-07 17:07:38,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-07 17:07:38,176 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 17:07:38,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:38,176 INFO L225 Difference]: With dead ends: 27 [2025-02-07 17:07:38,176 INFO L226 Difference]: Without dead ends: 19 [2025-02-07 17:07:38,177 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 17:07:38,177 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 20 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 11 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, 11 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:38,178 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 6 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:07:38,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2025-02-07 17:07:38,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2025-02-07 17:07:38,181 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 17:07:38,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2025-02-07 17:07:38,182 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 12 [2025-02-07 17:07:38,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:38,182 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2025-02-07 17:07:38,182 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 17:07:38,182 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2025-02-07 17:07:38,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-02-07 17:07:38,183 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:38,183 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 17:07:38,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-07 17:07:38,183 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:38,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:38,184 INFO L85 PathProgramCache]: Analyzing trace with hash -2131088553, now seen corresponding path program 1 times [2025-02-07 17:07:38,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:38,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812269655] [2025-02-07 17:07:38,184 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:07:38,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:38,200 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-07 17:07:38,218 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-07 17:07:38,218 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:07:38,218 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:38,338 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 17:07:38,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:38,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812269655] [2025-02-07 17:07:38,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812269655] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:38,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617250024] [2025-02-07 17:07:38,339 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:07:38,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:38,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:38,343 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 17:07:38,344 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 17:07:38,382 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-07 17:07:38,415 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-07 17:07:38,415 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:07:38,415 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:38,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-07 17:07:38,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:38,470 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 17:07:38,471 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:38,504 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 17:07:38,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617250024] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:38,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:38,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-02-07 17:07:38,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088318176] [2025-02-07 17:07:38,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:38,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-07 17:07:38,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:38,509 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-07 17:07:38,509 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2025-02-07 17:07:38,509 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 17:07:38,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:38,562 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2025-02-07 17:07:38,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-07 17:07:38,563 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 17:07:38,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:38,563 INFO L225 Difference]: With dead ends: 35 [2025-02-07 17:07:38,563 INFO L226 Difference]: Without dead ends: 20 [2025-02-07 17:07:38,564 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 17:07:38,564 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 17:07:38,565 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 17:07:38,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-02-07 17:07:38,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-02-07 17:07:38,572 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 17:07:38,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2025-02-07 17:07:38,573 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 18 [2025-02-07 17:07:38,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:38,573 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2025-02-07 17:07:38,573 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 17:07:38,573 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2025-02-07 17:07:38,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-07 17:07:38,574 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:38,574 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 17:07:38,579 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 17:07:38,774 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 17:07:38,775 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:38,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:38,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1841849420, now seen corresponding path program 2 times [2025-02-07 17:07:38,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:38,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866733113] [2025-02-07 17:07:38,775 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:07:38,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:38,786 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-07 17:07:38,799 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 17:07:38,800 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:07:38,800 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:38,915 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 17:07:38,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:38,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866733113] [2025-02-07 17:07:38,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866733113] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:38,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396529734] [2025-02-07 17:07:38,915 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:07:38,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:38,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:38,922 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 17:07:38,924 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 17:07:38,969 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-07 17:07:38,995 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 17:07:38,995 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:07:38,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:38,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-07 17:07:38,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:39,041 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 17:07:39,041 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:39,076 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 17:07:39,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396529734] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:39,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:39,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-02-07 17:07:39,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138463934] [2025-02-07 17:07:39,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:39,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-07 17:07:39,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:39,079 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-07 17:07:39,079 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-02-07 17:07:39,080 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 17:07:39,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:39,159 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2025-02-07 17:07:39,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 17:07:39,160 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 17:07:39,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:39,160 INFO L225 Difference]: With dead ends: 39 [2025-02-07 17:07:39,160 INFO L226 Difference]: Without dead ends: 26 [2025-02-07 17:07:39,161 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-02-07 17:07:39,161 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 20 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:39,161 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 8 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:07:39,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-02-07 17:07:39,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2025-02-07 17:07:39,166 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 17:07:39,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2025-02-07 17:07:39,167 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 19 [2025-02-07 17:07:39,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:39,167 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2025-02-07 17:07:39,167 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 17:07:39,167 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2025-02-07 17:07:39,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-02-07 17:07:39,167 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:39,167 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 17:07:39,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-07 17:07:39,368 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 17:07:39,368 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:39,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:39,368 INFO L85 PathProgramCache]: Analyzing trace with hash -820064244, now seen corresponding path program 3 times [2025-02-07 17:07:39,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:39,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099044508] [2025-02-07 17:07:39,369 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:07:39,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:39,383 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 2 equivalence classes. [2025-02-07 17:07:39,409 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-07 17:07:39,409 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-07 17:07:39,409 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:41,178 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 17:07:41,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:41,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099044508] [2025-02-07 17:07:41,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099044508] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:41,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651726869] [2025-02-07 17:07:41,179 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:07:41,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:41,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:41,182 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 17:07:41,184 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 17:07:41,221 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 2 equivalence classes. [2025-02-07 17:07:41,252 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-07 17:07:41,252 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-07 17:07:41,252 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:41,256 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-02-07 17:07:41,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:41,296 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 17:07:41,915 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 17:07:41,915 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:42,747 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 17:07:42,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651726869] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:42,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:42,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 49 [2025-02-07 17:07:42,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008791958] [2025-02-07 17:07:42,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:42,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-02-07 17:07:42,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:42,749 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-02-07 17:07:42,751 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2194, Unknown=0, NotChecked=0, Total=2352 [2025-02-07 17:07:42,751 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 49 states, 49 states have (on average 1.346938775510204) internal successors, (66), 49 states have internal predecessors, (66), 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 17:07:43,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:43,476 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2025-02-07 17:07:43,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-07 17:07:43,477 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.346938775510204) internal successors, (66), 49 states have internal predecessors, (66), 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 17:07:43,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:43,479 INFO L225 Difference]: With dead ends: 45 [2025-02-07 17:07:43,479 INFO L226 Difference]: Without dead ends: 42 [2025-02-07 17:07:43,480 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=188, Invalid=2782, Unknown=0, NotChecked=0, Total=2970 [2025-02-07 17:07:43,483 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:43,485 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 121 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-07 17:07:43,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-02-07 17:07:43,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2025-02-07 17:07:43,494 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 17:07:43,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2025-02-07 17:07:43,495 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 25 [2025-02-07 17:07:43,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:43,495 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2025-02-07 17:07:43,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.346938775510204) internal successors, (66), 49 states have internal predecessors, (66), 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 17:07:43,496 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2025-02-07 17:07:43,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-02-07 17:07:43,496 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:43,496 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 17:07:43,504 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 17:07:43,697 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 17:07:43,697 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:43,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:43,698 INFO L85 PathProgramCache]: Analyzing trace with hash 347843959, now seen corresponding path program 4 times [2025-02-07 17:07:43,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:43,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448295860] [2025-02-07 17:07:43,698 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:07:43,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:43,707 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-02-07 17:07:43,724 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 24 of 26 statements. [2025-02-07 17:07:43,724 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:07:43,725 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:43,803 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 17:07:43,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:43,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448295860] [2025-02-07 17:07:43,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448295860] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:43,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530207738] [2025-02-07 17:07:43,804 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:07:43,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:43,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:43,807 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 17:07:43,809 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 17:07:43,846 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-02-07 17:07:43,860 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 24 of 26 statements. [2025-02-07 17:07:43,860 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:07:43,860 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:43,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 17:07:43,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:43,932 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 17:07:43,932 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:43,991 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 17:07:43,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530207738] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:43,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:43,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2025-02-07 17:07:43,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769556247] [2025-02-07 17:07:43,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:43,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-07 17:07:43,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:43,992 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-07 17:07:43,993 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-02-07 17:07:43,994 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 17:07:44,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:44,164 INFO L93 Difference]: Finished difference Result 85 states and 111 transitions. [2025-02-07 17:07:44,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-07 17:07:44,164 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 17:07:44,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:44,165 INFO L225 Difference]: With dead ends: 85 [2025-02-07 17:07:44,165 INFO L226 Difference]: Without dead ends: 48 [2025-02-07 17:07:44,166 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 17:07:44,166 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:44,166 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 10 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:07:44,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-02-07 17:07:44,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2025-02-07 17:07:44,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.255813953488372) internal successors, (54), 43 states have internal predecessors, (54), 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 17:07:44,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2025-02-07 17:07:44,173 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 26 [2025-02-07 17:07:44,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:44,174 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2025-02-07 17:07:44,174 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 17:07:44,174 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2025-02-07 17:07:44,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-02-07 17:07:44,174 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:44,175 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:44,182 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 17:07:44,375 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 17:07:44,375 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:44,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:44,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1269346996, now seen corresponding path program 5 times [2025-02-07 17:07:44,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:44,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869653057] [2025-02-07 17:07:44,376 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:07:44,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:44,385 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 3 equivalence classes. [2025-02-07 17:07:44,394 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-02-07 17:07:44,394 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-07 17:07:44,394 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:44,478 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-07 17:07:44,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:44,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869653057] [2025-02-07 17:07:44,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869653057] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:44,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253440157] [2025-02-07 17:07:44,480 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:07:44,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:44,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:44,485 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 17:07:44,487 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 17:07:44,529 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 3 equivalence classes. [2025-02-07 17:07:44,558 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-02-07 17:07:44,558 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-07 17:07:44,558 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:44,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 17:07:44,561 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:44,617 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-07 17:07:44,618 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-07 17:07:44,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253440157] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:44,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:44,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2025-02-07 17:07:44,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047920005] [2025-02-07 17:07:44,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:44,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-07 17:07:44,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:44,683 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-07 17:07:44,683 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-02-07 17:07:44,684 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 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 17:07:44,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:44,837 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2025-02-07 17:07:44,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-07 17:07:44,838 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 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 27 [2025-02-07 17:07:44,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:44,838 INFO L225 Difference]: With dead ends: 48 [2025-02-07 17:07:44,838 INFO L226 Difference]: Without dead ends: 33 [2025-02-07 17:07:44,838 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2025-02-07 17:07:44,839 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:44,839 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 14 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:07:44,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-02-07 17:07:44,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2025-02-07 17:07:44,844 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 17:07:44,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2025-02-07 17:07:44,845 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 27 [2025-02-07 17:07:44,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:44,845 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2025-02-07 17:07:44,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 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 17:07:44,845 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2025-02-07 17:07:44,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-02-07 17:07:44,846 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:44,846 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 17:07:44,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-07 17:07:45,046 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 17:07:45,047 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:45,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:45,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1887935049, now seen corresponding path program 6 times [2025-02-07 17:07:45,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:45,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727827540] [2025-02-07 17:07:45,047 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:07:45,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:45,058 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 32 statements into 3 equivalence classes. [2025-02-07 17:07:45,124 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 32 of 32 statements. [2025-02-07 17:07:45,124 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-07 17:07:45,125 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:47,940 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 17:07:47,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:47,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727827540] [2025-02-07 17:07:47,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727827540] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:47,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972277869] [2025-02-07 17:07:47,940 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:07:47,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:47,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:47,944 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 17:07:47,945 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 17:07:47,983 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 32 statements into 3 equivalence classes. [2025-02-07 17:07:48,009 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 32 of 32 statements. [2025-02-07 17:07:48,009 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-07 17:07:48,009 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:48,011 WARN L254 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 90 conjuncts are in the unsatisfiable core [2025-02-07 17:07:48,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:48,094 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 17:07:49,023 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 17:07:49,023 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:50,193 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 17:07:50,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972277869] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:50,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:50,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26, 25] total 73 [2025-02-07 17:07:50,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904966594] [2025-02-07 17:07:50,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:50,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2025-02-07 17:07:50,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:50,195 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2025-02-07 17:07:50,197 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=5001, Unknown=0, NotChecked=0, Total=5256 [2025-02-07 17:07:50,198 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 73 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 73 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 17:07:51,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:51,876 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2025-02-07 17:07:51,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-02-07 17:07:51,879 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 73 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) Word has length 32 [2025-02-07 17:07:51,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:51,880 INFO L225 Difference]: With dead ends: 75 [2025-02-07 17:07:51,880 INFO L226 Difference]: Without dead ends: 54 [2025-02-07 17:07:51,881 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=358, Invalid=7124, Unknown=0, NotChecked=0, Total=7482 [2025-02-07 17:07:51,882 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:51,882 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 99 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-02-07 17:07:51,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-02-07 17:07:51,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2025-02-07 17:07:51,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.18) internal successors, (59), 50 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 17:07:51,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2025-02-07 17:07:51,897 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 32 [2025-02-07 17:07:51,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:51,898 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2025-02-07 17:07:51,899 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 73 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 17:07:51,899 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2025-02-07 17:07:51,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-02-07 17:07:51,899 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:51,899 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 17:07:51,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-07 17:07:52,100 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 17:07:52,100 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:52,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:52,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1603587372, now seen corresponding path program 7 times [2025-02-07 17:07:52,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:52,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048271106] [2025-02-07 17:07:52,101 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:07:52,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:52,109 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-07 17:07:52,119 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-07 17:07:52,122 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:07:52,122 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:52,245 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 17:07:52,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:52,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048271106] [2025-02-07 17:07:52,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048271106] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:52,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193612045] [2025-02-07 17:07:52,246 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:07:52,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:52,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:52,249 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 17:07:52,251 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 17:07:52,288 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-07 17:07:52,310 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-07 17:07:52,310 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:07:52,311 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:52,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-07 17:07:52,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:52,402 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 17:07:52,402 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:52,478 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 17:07:52,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193612045] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:52,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:52,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-02-07 17:07:52,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984248377] [2025-02-07 17:07:52,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:52,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-07 17:07:52,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:52,480 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-07 17:07:52,480 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2025-02-07 17:07:52,480 INFO L87 Difference]: Start difference. First operand 51 states and 59 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 17:07:52,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:52,672 INFO L93 Difference]: Finished difference Result 107 states and 130 transitions. [2025-02-07 17:07:52,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-07 17:07:52,673 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 17:07:52,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:52,674 INFO L225 Difference]: With dead ends: 107 [2025-02-07 17:07:52,674 INFO L226 Difference]: Without dead ends: 59 [2025-02-07 17:07:52,674 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2025-02-07 17:07:52,675 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:52,675 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 20 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:07:52,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-02-07 17:07:52,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2025-02-07 17:07:52,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 54 states have internal predecessors, (65), 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 17:07:52,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2025-02-07 17:07:52,690 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 33 [2025-02-07 17:07:52,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:52,691 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2025-02-07 17:07:52,691 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 17:07:52,691 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2025-02-07 17:07:52,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-02-07 17:07:52,691 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:52,692 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 17:07:52,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-07 17:07:52,892 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 17:07:52,892 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:52,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:52,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1233955785, now seen corresponding path program 8 times [2025-02-07 17:07:52,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:52,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265644803] [2025-02-07 17:07:52,893 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:07:52,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:52,900 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-02-07 17:07:52,906 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-02-07 17:07:52,906 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:07:52,906 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:53,014 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 17:07:53,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:53,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265644803] [2025-02-07 17:07:53,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265644803] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:53,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849422390] [2025-02-07 17:07:53,015 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:07:53,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:53,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:53,018 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 17:07:53,020 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 17:07:53,062 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-02-07 17:07:53,086 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-02-07 17:07:53,086 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:07:53,086 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:53,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-07 17:07:53,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:53,159 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 17:07:53,159 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:53,236 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 17:07:53,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849422390] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:53,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:53,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-02-07 17:07:53,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946193013] [2025-02-07 17:07:53,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:53,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-07 17:07:53,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:53,237 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-07 17:07:53,238 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2025-02-07 17:07:53,238 INFO L87 Difference]: Start difference. First operand 55 states and 65 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 17:07:53,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:53,413 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2025-02-07 17:07:53,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 17:07:53,413 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 17:07:53,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:53,414 INFO L225 Difference]: With dead ends: 59 [2025-02-07 17:07:53,414 INFO L226 Difference]: Without dead ends: 40 [2025-02-07 17:07:53,414 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2025-02-07 17:07:53,415 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:53,415 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 14 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:07:53,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-02-07 17:07:53,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2025-02-07 17:07:53,422 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 17:07:53,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2025-02-07 17:07:53,423 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 34 [2025-02-07 17:07:53,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:53,423 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2025-02-07 17:07:53,423 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 17:07:53,423 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2025-02-07 17:07:53,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-07 17:07:53,425 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:53,426 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 17:07:53,433 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 17:07:53,626 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 17:07:53,627 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:53,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:53,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1679570516, now seen corresponding path program 9 times [2025-02-07 17:07:53,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:53,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310076373] [2025-02-07 17:07:53,628 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:07:53,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:53,634 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 3 equivalence classes. [2025-02-07 17:07:53,660 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 17:07:53,660 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-07 17:07:53,660 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:56,576 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 17:07:56,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:56,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310076373] [2025-02-07 17:07:56,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310076373] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:56,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841951227] [2025-02-07 17:07:56,577 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:07:56,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:56,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:56,579 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 17:07:56,581 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 17:07:56,618 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 3 equivalence classes. [2025-02-07 17:07:56,650 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 17:07:56,650 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-07 17:07:56,650 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:56,653 WARN L254 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 127 conjuncts are in the unsatisfiable core [2025-02-07 17:07:56,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:56,810 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 17:07:58,790 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 17:07:58,790 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:08:01,255 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 17:08:01,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841951227] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:08:01,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:08:01,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 37] total 103 [2025-02-07 17:08:01,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732017236] [2025-02-07 17:08:01,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:08:01,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2025-02-07 17:08:01,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:08:01,257 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2025-02-07 17:08:01,259 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=696, Invalid=9810, Unknown=0, NotChecked=0, Total=10506 [2025-02-07 17:08:01,260 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 103 states, 103 states have (on average 1.0679611650485437) internal successors, (110), 103 states have internal predecessors, (110), 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 17:08:11,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:08:11,070 INFO L93 Difference]: Finished difference Result 167 states and 206 transitions. [2025-02-07 17:08:11,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2025-02-07 17:08:11,071 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.0679611650485437) internal successors, (110), 103 states have internal predecessors, (110), 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 17:08:11,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:08:11,073 INFO L225 Difference]: With dead ends: 167 [2025-02-07 17:08:11,073 INFO L226 Difference]: Without dead ends: 157 [2025-02-07 17:08:11,080 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7797 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=2342, Invalid=30600, Unknown=0, NotChecked=0, Total=32942 [2025-02-07 17:08:11,080 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 4512 mSolverCounterSat, 653 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 5165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 653 IncrementalHoareTripleChecker+Valid, 4512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2025-02-07 17:08:11,080 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 127 Invalid, 5165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [653 Valid, 4512 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2025-02-07 17:08:11,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2025-02-07 17:08:11,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 85. [2025-02-07 17:08:11,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 84 states have internal predecessors, (102), 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 17:08:11,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 102 transitions. [2025-02-07 17:08:11,120 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 102 transitions. Word has length 39 [2025-02-07 17:08:11,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:08:11,122 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 102 transitions. [2025-02-07 17:08:11,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.0679611650485437) internal successors, (110), 103 states have internal predecessors, (110), 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 17:08:11,122 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 102 transitions. [2025-02-07 17:08:11,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-02-07 17:08:11,125 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:08:11,125 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 17:08:11,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-07 17:08:11,326 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 17:08:11,326 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:08:11,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:08:11,327 INFO L85 PathProgramCache]: Analyzing trace with hash -591690825, now seen corresponding path program 10 times [2025-02-07 17:08:11,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:08:11,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571530326] [2025-02-07 17:08:11,327 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:08:11,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:08:11,333 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 40 statements into 2 equivalence classes. [2025-02-07 17:08:11,340 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 38 of 40 statements. [2025-02-07 17:08:11,340 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:08:11,340 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:11,462 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 17:08:11,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:08:11,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571530326] [2025-02-07 17:08:11,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571530326] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:08:11,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249060638] [2025-02-07 17:08:11,463 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:08:11,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:11,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:08:11,465 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 17:08:11,467 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 17:08:11,512 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 40 statements into 2 equivalence classes. [2025-02-07 17:08:11,535 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 38 of 40 statements. [2025-02-07 17:08:11,535 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:08:11,536 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:11,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 17:08:11,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:08:11,639 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 17:08:11,639 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:08:11,726 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 17:08:11,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249060638] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:08:11,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:08:11,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2025-02-07 17:08:11,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117721831] [2025-02-07 17:08:11,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:08:11,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-07 17:08:11,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:08:11,727 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-07 17:08:11,727 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2025-02-07 17:08:11,728 INFO L87 Difference]: Start difference. First operand 85 states and 102 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 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 17:08:11,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:08:11,946 INFO L93 Difference]: Finished difference Result 172 states and 207 transitions. [2025-02-07 17:08:11,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-07 17:08:11,946 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 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 17:08:11,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:08:11,947 INFO L225 Difference]: With dead ends: 172 [2025-02-07 17:08:11,947 INFO L226 Difference]: Without dead ends: 70 [2025-02-07 17:08:11,947 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2025-02-07 17:08:11,948 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:08:11,948 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 16 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:08:11,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2025-02-07 17:08:11,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2025-02-07 17:08:11,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 65 states have internal predecessors, (76), 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 17:08:11,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2025-02-07 17:08:11,967 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 40 [2025-02-07 17:08:11,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:08:11,967 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2025-02-07 17:08:11,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 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 17:08:11,967 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2025-02-07 17:08:11,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-02-07 17:08:11,967 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:08:11,968 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:08:11,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-07 17:08:12,168 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 17:08:12,168 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:08:12,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:08:12,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1191670036, now seen corresponding path program 11 times [2025-02-07 17:08:12,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:08:12,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835264564] [2025-02-07 17:08:12,169 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:08:12,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:08:12,175 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 41 statements into 4 equivalence classes. [2025-02-07 17:08:12,186 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 41 of 41 statements. [2025-02-07 17:08:12,186 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-07 17:08:12,186 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:12,322 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-07 17:08:12,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:08:12,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835264564] [2025-02-07 17:08:12,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835264564] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:08:12,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602388262] [2025-02-07 17:08:12,322 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:08:12,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:12,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:08:12,325 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 17:08:12,327 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 17:08:12,375 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 41 statements into 4 equivalence classes. [2025-02-07 17:08:12,517 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 41 of 41 statements. [2025-02-07 17:08:12,517 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-07 17:08:12,517 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:12,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 17:08:12,520 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:08:12,607 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-07 17:08:12,607 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:08:12,687 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-07 17:08:12,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602388262] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:08:12,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:08:12,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2025-02-07 17:08:12,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142016397] [2025-02-07 17:08:12,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:08:12,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-07 17:08:12,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:08:12,688 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-07 17:08:12,688 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2025-02-07 17:08:12,688 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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 17:08:12,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:08:12,857 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2025-02-07 17:08:12,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-07 17:08:12,857 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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) Word has length 41 [2025-02-07 17:08:12,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:08:12,857 INFO L225 Difference]: With dead ends: 70 [2025-02-07 17:08:12,858 INFO L226 Difference]: Without dead ends: 47 [2025-02-07 17:08:12,858 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 66 SyntacticMatches, 11 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2025-02-07 17:08:12,858 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:08:12,858 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 16 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:08:12,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2025-02-07 17:08:12,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2025-02-07 17:08:12,868 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 17:08:12,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2025-02-07 17:08:12,868 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 41 [2025-02-07 17:08:12,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:08:12,868 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2025-02-07 17:08:12,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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 17:08:12,868 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2025-02-07 17:08:12,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-02-07 17:08:12,869 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:08:12,869 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 17:08:12,878 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 17:08:13,069 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 17:08:13,069 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:08:13,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:08:13,070 INFO L85 PathProgramCache]: Analyzing trace with hash -937887721, now seen corresponding path program 12 times [2025-02-07 17:08:13,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:08:13,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197065748] [2025-02-07 17:08:13,070 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:08:13,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:08:13,077 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 46 statements into 4 equivalence classes. [2025-02-07 17:08:13,136 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 46 of 46 statements. [2025-02-07 17:08:13,136 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-02-07 17:08:13,136 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:16,820 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 17:08:16,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:08:16,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197065748] [2025-02-07 17:08:16,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197065748] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:08:16,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852396747] [2025-02-07 17:08:16,820 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:08:16,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:16,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:08:16,823 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 17:08:16,824 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 17:08:16,863 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 46 statements into 4 equivalence classes. [2025-02-07 17:08:16,892 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 46 of 46 statements. [2025-02-07 17:08:16,892 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-02-07 17:08:16,892 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:16,894 WARN L254 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 143 conjuncts are in the unsatisfiable core [2025-02-07 17:08:16,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:08:16,941 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 19 treesize of output 1 [2025-02-07 17:08:19,050 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:08:19,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2025-02-07 17:08:19,173 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 5 proven. 90 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 17:08:19,173 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:08:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 17:08:22,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852396747] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:08:22,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:08:22,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 40, 40] total 117 [2025-02-07 17:08:22,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796831567] [2025-02-07 17:08:22,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:08:22,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2025-02-07 17:08:22,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:08:22,252 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2025-02-07 17:08:22,254 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=864, Invalid=12708, Unknown=0, NotChecked=0, Total=13572 [2025-02-07 17:08:22,254 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 117 states, 117 states have (on average 1.0769230769230769) internal successors, (126), 117 states have internal predecessors, (126), 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 17:08:36,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:08:36,713 INFO L93 Difference]: Finished difference Result 212 states and 279 transitions. [2025-02-07 17:08:36,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2025-02-07 17:08:36,714 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.0769230769230769) internal successors, (126), 117 states have internal predecessors, (126), 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 17:08:36,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:08:36,715 INFO L225 Difference]: With dead ends: 212 [2025-02-07 17:08:36,715 INFO L226 Difference]: Without dead ends: 209 [2025-02-07 17:08:36,717 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8179 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=3345, Invalid=31811, Unknown=0, NotChecked=0, Total=35156 [2025-02-07 17:08:36,717 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 5692 mSolverCounterSat, 956 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 6650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 956 IncrementalHoareTripleChecker+Valid, 5692 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2025-02-07 17:08:36,717 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 123 Invalid, 6650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [956 Valid, 5692 Invalid, 2 Unknown, 0 Unchecked, 3.8s Time] [2025-02-07 17:08:36,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2025-02-07 17:08:36,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 166. [2025-02-07 17:08:36,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.290909090909091) internal successors, (213), 165 states have internal predecessors, (213), 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 17:08:36,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 213 transitions. [2025-02-07 17:08:36,781 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 213 transitions. Word has length 46 [2025-02-07 17:08:36,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:08:36,781 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 213 transitions. [2025-02-07 17:08:36,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.0769230769230769) internal successors, (126), 117 states have internal predecessors, (126), 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 17:08:36,781 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 213 transitions. [2025-02-07 17:08:36,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-02-07 17:08:36,782 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:08:36,782 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 17:08:36,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-07 17:08:36,982 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 17:08:36,982 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:08:36,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:08:36,983 INFO L85 PathProgramCache]: Analyzing trace with hash -598643177, now seen corresponding path program 13 times [2025-02-07 17:08:36,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:08:36,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342940804] [2025-02-07 17:08:36,983 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:08:36,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:08:36,990 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-02-07 17:08:37,000 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-02-07 17:08:37,000 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:08:37,000 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:37,181 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 17:08:37,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:08:37,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342940804] [2025-02-07 17:08:37,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342940804] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:08:37,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689410735] [2025-02-07 17:08:37,181 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:08:37,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:37,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:08:37,184 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 17:08:37,186 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 17:08:37,236 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-02-07 17:08:37,266 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-02-07 17:08:37,266 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:08:37,266 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:37,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 17:08:37,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:08:37,369 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 17:08:37,370 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:08:37,475 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 17:08:37,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689410735] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:08:37,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:08:37,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2025-02-07 17:08:37,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112155928] [2025-02-07 17:08:37,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:08:37,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-07 17:08:37,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:08:37,477 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-07 17:08:37,477 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2025-02-07 17:08:37,477 INFO L87 Difference]: Start difference. First operand 166 states and 213 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 17:08:37,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:08:37,782 INFO L93 Difference]: Finished difference Result 246 states and 318 transitions. [2025-02-07 17:08:37,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-07 17:08:37,783 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 17:08:37,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:08:37,784 INFO L225 Difference]: With dead ends: 246 [2025-02-07 17:08:37,784 INFO L226 Difference]: Without dead ends: 158 [2025-02-07 17:08:37,784 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 76 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2025-02-07 17:08:37,784 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 33 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:08:37,785 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 12 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:08:37,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2025-02-07 17:08:37,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 141. [2025-02-07 17:08:37,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.2428571428571429) internal successors, (174), 140 states have internal predecessors, (174), 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 17:08:37,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 174 transitions. [2025-02-07 17:08:37,835 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 174 transitions. Word has length 48 [2025-02-07 17:08:37,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:08:37,835 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 174 transitions. [2025-02-07 17:08:37,835 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 17:08:37,835 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 174 transitions. [2025-02-07 17:08:37,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-02-07 17:08:37,836 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:08:37,836 INFO L218 NwaCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:08:37,844 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 17:08:38,036 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 17:08:38,037 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:08:38,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:08:38,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1819311060, now seen corresponding path program 14 times [2025-02-07 17:08:38,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:08:38,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475413604] [2025-02-07 17:08:38,037 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:08:38,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:08:38,042 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 49 statements into 2 equivalence classes. [2025-02-07 17:08:38,049 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-02-07 17:08:38,049 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:08:38,049 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 29 proven. 22 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-02-07 17:08:38,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:08:38,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475413604] [2025-02-07 17:08:38,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475413604] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:08:38,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915772605] [2025-02-07 17:08:38,239 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:08:38,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:38,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:08:38,241 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 17:08:38,242 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 17:08:38,283 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 49 statements into 2 equivalence classes. [2025-02-07 17:08:38,311 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-02-07 17:08:38,312 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:08:38,312 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:38,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 17:08:38,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:08:38,453 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2025-02-07 17:08:38,453 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:08:38,552 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2025-02-07 17:08:38,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915772605] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:08:38,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:08:38,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 25 [2025-02-07 17:08:38,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214779590] [2025-02-07 17:08:38,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:08:38,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-07 17:08:38,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:08:38,553 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-07 17:08:38,553 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2025-02-07 17:08:38,554 INFO L87 Difference]: Start difference. First operand 141 states and 174 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 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 17:08:38,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:08:38,798 INFO L93 Difference]: Finished difference Result 180 states and 218 transitions. [2025-02-07 17:08:38,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-07 17:08:38,798 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 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 49 [2025-02-07 17:08:38,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:08:38,799 INFO L225 Difference]: With dead ends: 180 [2025-02-07 17:08:38,799 INFO L226 Difference]: Without dead ends: 54 [2025-02-07 17:08:38,800 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 79 SyntacticMatches, 11 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=652, Unknown=0, NotChecked=0, Total=870 [2025-02-07 17:08:38,800 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:08:38,800 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:08:38,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-02-07 17:08:38,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2025-02-07 17:08:38,820 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 17:08:38,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2025-02-07 17:08:38,821 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 49 [2025-02-07 17:08:38,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:08:38,821 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2025-02-07 17:08:38,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 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 17:08:38,821 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2025-02-07 17:08:38,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-02-07 17:08:38,821 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:08:38,821 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 17:08:38,827 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 17:08:39,021 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 17:08:39,022 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:08:39,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:08:39,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1688431436, now seen corresponding path program 15 times [2025-02-07 17:08:39,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:08:39,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240997954] [2025-02-07 17:08:39,022 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:08:39,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:08:39,028 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 53 statements into 4 equivalence classes. [2025-02-07 17:08:39,077 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 53 of 53 statements. [2025-02-07 17:08:39,077 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 17:08:39,077 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:44,711 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 17:08:44,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:08:44,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240997954] [2025-02-07 17:08:44,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240997954] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:08:44,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569912916] [2025-02-07 17:08:44,712 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:08:44,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:44,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:08:44,714 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 17:08:44,715 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 17:08:44,762 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 53 statements into 4 equivalence classes. [2025-02-07 17:08:44,801 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 53 of 53 statements. [2025-02-07 17:08:44,802 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 17:08:44,802 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:44,805 WARN L254 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 176 conjuncts are in the unsatisfiable core [2025-02-07 17:08:44,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:08:45,071 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 17:08:48,303 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 17:08:48,303 INFO L312 TraceCheckSpWp]: Computing backward predicates...