./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/poly2.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-tiling/poly2.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 d98e92b0e397ee2afc9955ae7b4baaedb8be19fb7d6475412e7373cae81d62ab --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 16:59:11,818 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 16:59:11,892 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 16:59:11,898 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 16:59:11,899 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 16:59:11,920 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 16:59:11,921 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 16:59:11,921 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 16:59:11,922 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 16:59:11,922 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 16:59:11,923 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 16:59:11,923 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 16:59:11,924 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 16:59:11,924 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 16:59:11,924 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 16:59:11,924 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 16:59:11,924 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 16:59:11,924 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 16:59:11,924 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 16:59:11,925 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 16:59:11,925 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 16:59:11,925 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 16:59:11,925 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 16:59:11,925 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 16:59:11,925 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 16:59:11,926 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 16:59:11,926 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 16:59:11,926 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 16:59:11,926 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 16:59:11,926 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 16:59:11,926 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 16:59:11,926 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 16:59:11,926 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 16:59:11,927 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 16:59:11,927 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 16:59:11,927 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 16:59:11,927 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 16:59:11,928 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 16:59:11,928 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 16:59:11,928 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 16:59:11,928 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 16:59:11,928 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 16:59:11,928 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 16:59:11,928 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 -> d98e92b0e397ee2afc9955ae7b4baaedb8be19fb7d6475412e7373cae81d62ab [2025-02-07 16:59:12,215 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 16:59:12,225 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 16:59:12,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 16:59:12,229 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 16:59:12,229 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 16:59:12,230 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/poly2.c [2025-02-07 16:59:13,589 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/8e2142834/8a2ad3b844ab4872a0f48400ccb0c279/FLAGad0f4c613 [2025-02-07 16:59:13,837 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 16:59:13,837 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-tiling/poly2.c [2025-02-07 16:59:13,843 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/8e2142834/8a2ad3b844ab4872a0f48400ccb0c279/FLAGad0f4c613 [2025-02-07 16:59:13,856 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/8e2142834/8a2ad3b844ab4872a0f48400ccb0c279 [2025-02-07 16:59:13,859 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 16:59:13,860 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 16:59:13,861 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 16:59:13,861 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 16:59:13,865 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 16:59:13,866 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 04:59:13" (1/1) ... [2025-02-07 16:59:13,867 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6162a40a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:59:13, skipping insertion in model container [2025-02-07 16:59:13,867 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 04:59:13" (1/1) ... [2025-02-07 16:59:13,878 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 16:59:14,025 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-tiling/poly2.c[396,409] [2025-02-07 16:59:14,045 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 16:59:14,058 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 16:59:14,068 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-tiling/poly2.c[396,409] [2025-02-07 16:59:14,077 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 16:59:14,092 INFO L204 MainTranslator]: Completed translation [2025-02-07 16:59:14,092 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:59:14 WrapperNode [2025-02-07 16:59:14,094 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 16:59:14,095 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 16:59:14,096 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 16:59:14,096 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 16:59:14,101 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:59:14" (1/1) ... [2025-02-07 16:59:14,109 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:59:14" (1/1) ... [2025-02-07 16:59:14,124 INFO L138 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2025-02-07 16:59:14,125 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 16:59:14,125 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 16:59:14,126 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 16:59:14,126 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 16:59:14,133 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:59:14" (1/1) ... [2025-02-07 16:59:14,134 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:59:14" (1/1) ... [2025-02-07 16:59:14,135 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:59:14" (1/1) ... [2025-02-07 16:59:14,153 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 4, 8]. 57 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 0, 8]. The 2 writes are split as follows [0, 2, 0]. [2025-02-07 16:59:14,155 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:59:14" (1/1) ... [2025-02-07 16:59:14,155 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:59:14" (1/1) ... [2025-02-07 16:59:14,160 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:59:14" (1/1) ... [2025-02-07 16:59:14,165 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:59:14" (1/1) ... [2025-02-07 16:59:14,165 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:59:14" (1/1) ... [2025-02-07 16:59:14,166 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:59:14" (1/1) ... [2025-02-07 16:59:14,167 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 16:59:14,168 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 16:59:14,168 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 16:59:14,168 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 16:59:14,173 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:59:14" (1/1) ... [2025-02-07 16:59:14,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 16:59:14,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:59:14,205 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 16:59:14,208 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 16:59:14,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 16:59:14,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 16:59:14,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-07 16:59:14,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-07 16:59:14,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-07 16:59:14,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-07 16:59:14,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-07 16:59:14,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-07 16:59:14,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 16:59:14,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 16:59:14,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-07 16:59:14,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-07 16:59:14,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-07 16:59:14,283 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 16:59:14,286 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 16:59:14,419 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-02-07 16:59:14,420 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 16:59:14,427 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 16:59:14,428 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 16:59:14,428 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 04:59:14 BoogieIcfgContainer [2025-02-07 16:59:14,428 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 16:59:14,431 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 16:59:14,432 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 16:59:14,436 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 16:59:14,437 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 04:59:13" (1/3) ... [2025-02-07 16:59:14,438 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25a87b9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 04:59:14, skipping insertion in model container [2025-02-07 16:59:14,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:59:14" (2/3) ... [2025-02-07 16:59:14,439 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25a87b9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 04:59:14, skipping insertion in model container [2025-02-07 16:59:14,439 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 04:59:14" (3/3) ... [2025-02-07 16:59:14,440 INFO L128 eAbstractionObserver]: Analyzing ICFG poly2.c [2025-02-07 16:59:14,458 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 16:59:14,461 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG poly2.c that has 1 procedures, 12 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-02-07 16:59:14,516 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 16:59:14,528 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;@2f6d8225, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 16:59:14,529 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 16:59:14,532 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 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 16:59:14,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-02-07 16:59:14,538 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:14,538 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:14,539 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:14,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:14,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1635990217, now seen corresponding path program 1 times [2025-02-07 16:59:14,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:14,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260647200] [2025-02-07 16:59:14,553 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:59:14,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:14,611 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-07 16:59:14,630 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-07 16:59:14,631 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:59:14,631 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:14,788 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 16:59:14,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:14,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260647200] [2025-02-07 16:59:14,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260647200] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 16:59:14,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 16:59:14,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-07 16:59:14,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981723580] [2025-02-07 16:59:14,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 16:59:14,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-07 16:59:14,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:14,809 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-07 16:59:14,809 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 16:59:14,812 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 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 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 16:59:14,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:14,869 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2025-02-07 16:59:14,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-07 16:59:14,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2025-02-07 16:59:14,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:14,877 INFO L225 Difference]: With dead ends: 22 [2025-02-07 16:59:14,877 INFO L226 Difference]: Without dead ends: 10 [2025-02-07 16:59:14,879 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 16:59:14,887 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:14,888 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 16:59:14,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2025-02-07 16:59:14,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2025-02-07 16:59:14,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 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 16:59:14,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2025-02-07 16:59:14,919 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2025-02-07 16:59:14,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:14,919 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2025-02-07 16:59:14,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 16:59:14,920 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2025-02-07 16:59:14,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-02-07 16:59:14,921 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:14,921 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:14,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 16:59:14,921 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:14,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:14,923 INFO L85 PathProgramCache]: Analyzing trace with hash -793402884, now seen corresponding path program 1 times [2025-02-07 16:59:14,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:14,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675649508] [2025-02-07 16:59:14,923 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:59:14,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:14,940 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-07 16:59:14,959 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-07 16:59:14,959 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:59:14,959 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:15,055 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 16:59:15,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:15,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675649508] [2025-02-07 16:59:15,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675649508] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 16:59:15,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 16:59:15,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-07 16:59:15,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785986758] [2025-02-07 16:59:15,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 16:59:15,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-07 16:59:15,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:15,061 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-07 16:59:15,061 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-07 16:59:15,062 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 16:59:15,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:15,098 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2025-02-07 16:59:15,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-07 16:59:15,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2025-02-07 16:59:15,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:15,100 INFO L225 Difference]: With dead ends: 21 [2025-02-07 16:59:15,100 INFO L226 Difference]: Without dead ends: 16 [2025-02-07 16:59:15,101 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 16:59:15,102 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:15,102 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 8 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 16:59:15,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2025-02-07 16:59:15,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2025-02-07 16:59:15,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 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 16:59:15,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2025-02-07 16:59:15,106 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2025-02-07 16:59:15,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:15,106 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2025-02-07 16:59:15,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 16:59:15,106 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2025-02-07 16:59:15,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-07 16:59:15,107 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:15,107 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:15,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-07 16:59:15,107 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:15,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:15,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1175269641, now seen corresponding path program 1 times [2025-02-07 16:59:15,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:15,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492656348] [2025-02-07 16:59:15,108 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:59:15,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:15,121 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-07 16:59:15,145 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-07 16:59:15,148 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:59:15,150 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 16:59:15,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:15,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492656348] [2025-02-07 16:59:15,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492656348] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:59:15,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365071243] [2025-02-07 16:59:15,251 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:59:15,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:15,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:59:15,256 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 16:59:15,258 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 16:59:15,311 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-07 16:59:15,339 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-07 16:59:15,339 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:59:15,339 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:15,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-07 16:59:15,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:59:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 16:59:15,411 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:59:15,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 16:59:15,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365071243] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:59:15,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:59:15,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-02-07 16:59:15,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388899159] [2025-02-07 16:59:15,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:59:15,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-07 16:59:15,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:15,437 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-07 16:59:15,437 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2025-02-07 16:59:15,438 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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 16:59:15,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:15,462 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2025-02-07 16:59:15,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 16:59:15,462 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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 9 [2025-02-07 16:59:15,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:15,463 INFO L225 Difference]: With dead ends: 19 [2025-02-07 16:59:15,463 INFO L226 Difference]: Without dead ends: 12 [2025-02-07 16:59:15,463 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 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 16:59:15,464 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:15,464 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 16:59:15,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2025-02-07 16:59:15,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2025-02-07 16:59:15,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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 16:59:15,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2025-02-07 16:59:15,467 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2025-02-07 16:59:15,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:15,467 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2025-02-07 16:59:15,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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 16:59:15,467 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2025-02-07 16:59:15,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-02-07 16:59:15,468 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:15,468 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:15,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-07 16:59:15,672 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 16:59:15,672 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:15,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:15,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1304258692, now seen corresponding path program 2 times [2025-02-07 16:59:15,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:15,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902234679] [2025-02-07 16:59:15,673 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 16:59:15,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:15,683 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 10 statements into 2 equivalence classes. [2025-02-07 16:59:15,712 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 10 of 10 statements. [2025-02-07 16:59:15,713 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 16:59:15,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:15,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 16:59:15,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:15,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902234679] [2025-02-07 16:59:15,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902234679] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:59:15,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219226151] [2025-02-07 16:59:15,837 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 16:59:15,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:15,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:59:15,840 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 16:59:15,843 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 16:59:15,880 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 10 statements into 2 equivalence classes. [2025-02-07 16:59:15,897 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 10 of 10 statements. [2025-02-07 16:59:15,897 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 16:59:15,897 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:15,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-07 16:59:15,899 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:59:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 16:59:15,936 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:59:15,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 16:59:15,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219226151] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:59:15,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:59:15,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-02-07 16:59:15,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064478368] [2025-02-07 16:59:15,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:59:15,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-07 16:59:15,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:15,971 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-07 16:59:15,971 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-02-07 16:59:15,971 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 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 16:59:16,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:16,035 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2025-02-07 16:59:16,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 16:59:16,035 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 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 10 [2025-02-07 16:59:16,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:16,035 INFO L225 Difference]: With dead ends: 28 [2025-02-07 16:59:16,035 INFO L226 Difference]: Without dead ends: 23 [2025-02-07 16:59:16,036 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2025-02-07 16:59:16,036 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:16,036 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 14 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 16:59:16,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-02-07 16:59:16,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 13. [2025-02-07 16:59:16,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 16:59:16,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2025-02-07 16:59:16,045 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2025-02-07 16:59:16,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:16,045 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2025-02-07 16:59:16,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 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 16:59:16,045 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2025-02-07 16:59:16,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-02-07 16:59:16,046 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:16,046 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:16,053 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 16:59:16,246 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 16:59:16,247 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:16,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:16,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1776358519, now seen corresponding path program 3 times [2025-02-07 16:59:16,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:16,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793113562] [2025-02-07 16:59:16,247 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 16:59:16,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:16,257 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 11 statements into 2 equivalence classes. [2025-02-07 16:59:16,287 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-02-07 16:59:16,287 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-07 16:59:16,287 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 16:59:16,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [882446558] [2025-02-07 16:59:16,290 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 16:59:16,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:16,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:59:16,292 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 16:59:16,295 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 16:59:16,333 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 11 statements into 2 equivalence classes. [2025-02-07 16:59:16,361 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-02-07 16:59:16,361 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-07 16:59:16,361 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:16,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-07 16:59:16,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:59:16,404 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 11 treesize of output 7 [2025-02-07 16:59:16,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-02-07 16:59:16,495 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:16,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 28 treesize of output 23 [2025-02-07 16:59:16,535 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:16,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 30 treesize of output 23 [2025-02-07 16:59:16,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:16,611 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:59:17,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2025-02-07 16:59:17,043 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:17,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 95 [2025-02-07 16:59:17,122 INFO L349 Elim1Store]: treesize reduction 20, result has 54.5 percent of original size [2025-02-07 16:59:17,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 99 treesize of output 72 [2025-02-07 16:59:17,173 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:17,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 69 treesize of output 58 [2025-02-07 16:59:17,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:17,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:17,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793113562] [2025-02-07 16:59:17,230 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 16:59:17,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882446558] [2025-02-07 16:59:17,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882446558] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:59:17,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 16:59:17,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2025-02-07 16:59:17,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837794040] [2025-02-07 16:59:17,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 16:59:17,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-07 16:59:17,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:17,231 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-07 16:59:17,232 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2025-02-07 16:59:17,232 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 18 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 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 16:59:17,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:17,961 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2025-02-07 16:59:17,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-07 16:59:17,962 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 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 16:59:17,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:17,963 INFO L225 Difference]: With dead ends: 63 [2025-02-07 16:59:17,963 INFO L226 Difference]: Without dead ends: 61 [2025-02-07 16:59:17,963 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2025-02-07 16:59:17,964 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 89 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:17,964 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 63 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 16:59:17,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-02-07 16:59:17,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 27. [2025-02-07 16:59:17,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 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 16:59:17,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2025-02-07 16:59:17,977 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2025-02-07 16:59:17,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:17,977 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-02-07 16:59:17,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 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 16:59:17,977 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2025-02-07 16:59:17,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-02-07 16:59:17,978 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:17,979 INFO L218 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:17,986 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 16:59:18,183 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 16:59:18,183 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:18,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:18,184 INFO L85 PathProgramCache]: Analyzing trace with hash 617718249, now seen corresponding path program 4 times [2025-02-07 16:59:18,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:18,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192680356] [2025-02-07 16:59:18,184 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 16:59:18,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:18,192 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 13 statements into 2 equivalence classes. [2025-02-07 16:59:18,202 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-02-07 16:59:18,202 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 16:59:18,202 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:18,353 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:18,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:18,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192680356] [2025-02-07 16:59:18,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192680356] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:59:18,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077060001] [2025-02-07 16:59:18,354 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 16:59:18,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:18,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:59:18,356 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 16:59:18,361 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 16:59:18,423 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 13 statements into 2 equivalence classes. [2025-02-07 16:59:18,443 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-02-07 16:59:18,443 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 16:59:18,443 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:18,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-07 16:59:18,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:59:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:18,518 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:59:18,606 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:18,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077060001] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:59:18,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:59:18,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2025-02-07 16:59:18,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796586731] [2025-02-07 16:59:18,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:59:18,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-07 16:59:18,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:18,608 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-07 16:59:18,608 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2025-02-07 16:59:18,608 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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 16:59:18,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:18,937 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2025-02-07 16:59:18,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-07 16:59:18,938 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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 13 [2025-02-07 16:59:18,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:18,939 INFO L225 Difference]: With dead ends: 72 [2025-02-07 16:59:18,939 INFO L226 Difference]: Without dead ends: 65 [2025-02-07 16:59:18,940 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2025-02-07 16:59:18,941 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 99 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:18,941 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 100 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 16:59:18,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2025-02-07 16:59:18,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 30. [2025-02-07 16:59:18,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:18,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2025-02-07 16:59:18,953 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2025-02-07 16:59:18,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:18,953 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2025-02-07 16:59:18,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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 16:59:18,954 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2025-02-07 16:59:18,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-02-07 16:59:18,954 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:18,954 INFO L218 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:18,962 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 16:59:19,159 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 16:59:19,159 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:19,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:19,160 INFO L85 PathProgramCache]: Analyzing trace with hash -256003396, now seen corresponding path program 5 times [2025-02-07 16:59:19,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:19,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149790824] [2025-02-07 16:59:19,160 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 16:59:19,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:19,168 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 14 statements into 4 equivalence classes. [2025-02-07 16:59:19,202 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 14 of 14 statements. [2025-02-07 16:59:19,202 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-07 16:59:19,203 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:19,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:19,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149790824] [2025-02-07 16:59:19,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149790824] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:59:19,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897428284] [2025-02-07 16:59:19,341 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 16:59:19,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:19,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:59:19,344 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 16:59:19,346 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 16:59:19,384 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 14 statements into 4 equivalence classes. [2025-02-07 16:59:20,550 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 14 of 14 statements. [2025-02-07 16:59:20,550 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-07 16:59:20,550 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:20,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-07 16:59:20,554 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:59:20,662 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:20,662 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:59:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:20,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897428284] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:59:20,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:59:20,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2025-02-07 16:59:20,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874426762] [2025-02-07 16:59:20,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:59:20,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-07 16:59:20,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:20,741 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-07 16:59:20,741 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2025-02-07 16:59:20,741 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 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 16:59:21,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:21,027 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2025-02-07 16:59:21,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-07 16:59:21,028 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 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 14 [2025-02-07 16:59:21,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:21,029 INFO L225 Difference]: With dead ends: 108 [2025-02-07 16:59:21,030 INFO L226 Difference]: Without dead ends: 84 [2025-02-07 16:59:21,031 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=694, Unknown=0, NotChecked=0, Total=930 [2025-02-07 16:59:21,032 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 152 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:21,033 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 53 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 16:59:21,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-02-07 16:59:21,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 41. [2025-02-07 16:59:21,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.225) internal successors, (49), 40 states have internal predecessors, (49), 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 16:59:21,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2025-02-07 16:59:21,048 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 14 [2025-02-07 16:59:21,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:21,049 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2025-02-07 16:59:21,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 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 16:59:21,050 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2025-02-07 16:59:21,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-02-07 16:59:21,051 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:21,051 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:21,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-07 16:59:21,251 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 16:59:21,252 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:21,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:21,252 INFO L85 PathProgramCache]: Analyzing trace with hash 952319049, now seen corresponding path program 6 times [2025-02-07 16:59:21,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:21,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211184574] [2025-02-07 16:59:21,252 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 16:59:21,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:21,260 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 3 equivalence classes. [2025-02-07 16:59:21,311 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 15 of 15 statements. [2025-02-07 16:59:21,311 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-07 16:59:21,311 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 16:59:21,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480047774] [2025-02-07 16:59:21,313 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 16:59:21,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:21,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:59:21,316 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 16:59:21,318 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 16:59:21,359 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 3 equivalence classes. [2025-02-07 16:59:21,435 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 15 of 15 statements. [2025-02-07 16:59:21,435 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-07 16:59:21,435 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:21,437 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-02-07 16:59:21,439 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:59:21,448 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 11 treesize of output 7 [2025-02-07 16:59:21,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-02-07 16:59:21,484 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:21,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 30 treesize of output 32 [2025-02-07 16:59:21,511 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:21,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2025-02-07 16:59:21,575 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:21,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 47 [2025-02-07 16:59:21,618 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:21,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 47 [2025-02-07 16:59:21,657 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:21,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 47 [2025-02-07 16:59:21,699 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:21,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 47 [2025-02-07 16:59:21,802 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:21,802 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:59:23,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2025-02-07 16:59:23,436 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:23,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 95 [2025-02-07 16:59:23,531 INFO L349 Elim1Store]: treesize reduction 20, result has 54.5 percent of original size [2025-02-07 16:59:23,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 551 treesize of output 522 [2025-02-07 16:59:23,692 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:23,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 467 treesize of output 452 [2025-02-07 16:59:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:23,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:23,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211184574] [2025-02-07 16:59:23,928 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 16:59:23,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480047774] [2025-02-07 16:59:23,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480047774] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:59:23,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 16:59:23,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2025-02-07 16:59:23,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273305004] [2025-02-07 16:59:23,929 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 16:59:23,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-07 16:59:23,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:23,930 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-07 16:59:23,930 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2025-02-07 16:59:23,931 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 25 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 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 16:59:28,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:28,456 INFO L93 Difference]: Finished difference Result 117 states and 135 transitions. [2025-02-07 16:59:28,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-02-07 16:59:28,457 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 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 15 [2025-02-07 16:59:28,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:28,458 INFO L225 Difference]: With dead ends: 117 [2025-02-07 16:59:28,458 INFO L226 Difference]: Without dead ends: 115 [2025-02-07 16:59:28,459 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=284, Invalid=1356, Unknown=0, NotChecked=0, Total=1640 [2025-02-07 16:59:28,459 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 116 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:28,459 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 115 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-02-07 16:59:28,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2025-02-07 16:59:28,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 57. [2025-02-07 16:59:28,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.25) internal successors, (70), 56 states have internal predecessors, (70), 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 16:59:28,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2025-02-07 16:59:28,479 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 15 [2025-02-07 16:59:28,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:28,479 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2025-02-07 16:59:28,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 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 16:59:28,480 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2025-02-07 16:59:28,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-02-07 16:59:28,481 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:28,481 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:28,489 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 16:59:28,681 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 16:59:28,681 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:28,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:28,682 INFO L85 PathProgramCache]: Analyzing trace with hash 503828288, now seen corresponding path program 1 times [2025-02-07 16:59:28,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:28,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194839216] [2025-02-07 16:59:28,682 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:59:28,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:28,691 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-07 16:59:28,762 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-07 16:59:28,763 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:59:28,763 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 16:59:28,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1601800963] [2025-02-07 16:59:28,764 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:59:28,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:28,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:59:28,767 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 16:59:28,769 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 16:59:28,812 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-07 16:59:28,855 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-07 16:59:28,855 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:59:28,855 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:28,856 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-02-07 16:59:28,859 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:59:28,875 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 13 treesize of output 9 [2025-02-07 16:59:28,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2025-02-07 16:59:28,923 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:28,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 34 [2025-02-07 16:59:28,947 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:28,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 32 treesize of output 25 [2025-02-07 16:59:28,967 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:28,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 32 treesize of output 25 [2025-02-07 16:59:29,074 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:29,074 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:59:29,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2025-02-07 16:59:29,685 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:29,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 95 [2025-02-07 16:59:29,750 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:29,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 86 treesize of output 80 [2025-02-07 16:59:29,872 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:29,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:29,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194839216] [2025-02-07 16:59:29,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 16:59:29,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601800963] [2025-02-07 16:59:29,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601800963] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:59:29,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 16:59:29,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2025-02-07 16:59:29,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48773305] [2025-02-07 16:59:29,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 16:59:29,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-07 16:59:29,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:29,874 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-07 16:59:29,875 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2025-02-07 16:59:29,875 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 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 16:59:31,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:31,388 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2025-02-07 16:59:31,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-07 16:59:31,389 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 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 16 [2025-02-07 16:59:31,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:31,389 INFO L225 Difference]: With dead ends: 87 [2025-02-07 16:59:31,389 INFO L226 Difference]: Without dead ends: 73 [2025-02-07 16:59:31,390 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=236, Invalid=1246, Unknown=0, NotChecked=0, Total=1482 [2025-02-07 16:59:31,390 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 70 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:31,391 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 112 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-07 16:59:31,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2025-02-07 16:59:31,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2025-02-07 16:59:31,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.25) internal successors, (65), 52 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 16:59:31,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2025-02-07 16:59:31,404 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 16 [2025-02-07 16:59:31,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:31,404 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2025-02-07 16:59:31,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 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 16:59:31,404 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2025-02-07 16:59:31,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-02-07 16:59:31,405 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:31,405 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:31,414 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 16:59:31,605 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 16:59:31,606 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:31,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:31,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1558512156, now seen corresponding path program 7 times [2025-02-07 16:59:31,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:31,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915560599] [2025-02-07 16:59:31,606 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 16:59:31,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:31,614 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-07 16:59:31,624 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-07 16:59:31,625 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:59:31,625 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:31,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:31,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915560599] [2025-02-07 16:59:31,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915560599] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:59:31,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068535789] [2025-02-07 16:59:31,830 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 16:59:31,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:31,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:59:31,832 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 16:59:31,835 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 16:59:31,878 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-07 16:59:31,897 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-07 16:59:31,897 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:59:31,897 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:31,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 16:59:31,899 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:59:31,986 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:31,987 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:59:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:32,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068535789] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:59:32,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:59:32,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2025-02-07 16:59:32,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624910694] [2025-02-07 16:59:32,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:59:32,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-07 16:59:32,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:32,059 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-07 16:59:32,059 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2025-02-07 16:59:32,059 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:32,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:32,242 INFO L93 Difference]: Finished difference Result 130 states and 142 transitions. [2025-02-07 16:59:32,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-07 16:59:32,243 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2025-02-07 16:59:32,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:32,243 INFO L225 Difference]: With dead ends: 130 [2025-02-07 16:59:32,243 INFO L226 Difference]: Without dead ends: 122 [2025-02-07 16:59:32,244 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 10 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2025-02-07 16:59:32,245 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 195 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:32,245 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 98 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 16:59:32,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2025-02-07 16:59:32,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 63. [2025-02-07 16:59:32,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 62 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:32,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2025-02-07 16:59:32,259 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 18 [2025-02-07 16:59:32,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:32,259 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2025-02-07 16:59:32,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:32,260 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2025-02-07 16:59:32,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-07 16:59:32,260 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:32,260 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:32,267 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 16:59:32,460 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 16:59:32,461 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:32,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:32,461 INFO L85 PathProgramCache]: Analyzing trace with hash 122480557, now seen corresponding path program 2 times [2025-02-07 16:59:32,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:32,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610365580] [2025-02-07 16:59:32,461 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 16:59:32,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:32,470 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-07 16:59:32,510 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 16:59:32,510 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 16:59:32,510 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-07 16:59:32,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:32,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610365580] [2025-02-07 16:59:32,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610365580] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:59:32,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853300308] [2025-02-07 16:59:32,684 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 16:59:32,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:32,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:59:32,686 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 16:59:32,688 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 16:59:32,743 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-07 16:59:32,765 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 16:59:32,765 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 16:59:32,765 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:32,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 16:59:32,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:59:32,852 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-07 16:59:32,853 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:59:32,941 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-07 16:59:32,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853300308] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:59:32,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:59:32,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2025-02-07 16:59:32,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944005479] [2025-02-07 16:59:32,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:59:32,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-07 16:59:32,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:32,942 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-07 16:59:32,943 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2025-02-07 16:59:32,943 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 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 16:59:33,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:33,243 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2025-02-07 16:59:33,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-07 16:59:33,244 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 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 16:59:33,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:33,244 INFO L225 Difference]: With dead ends: 111 [2025-02-07 16:59:33,244 INFO L226 Difference]: Without dead ends: 96 [2025-02-07 16:59:33,245 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 10 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2025-02-07 16:59:33,245 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 82 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:33,245 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 152 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 16:59:33,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2025-02-07 16:59:33,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 61. [2025-02-07 16:59:33,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 60 states have internal predecessors, (73), 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 16:59:33,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2025-02-07 16:59:33,260 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 19 [2025-02-07 16:59:33,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:33,260 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2025-02-07 16:59:33,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 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 16:59:33,260 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2025-02-07 16:59:33,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-07 16:59:33,261 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:33,261 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:33,267 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 16:59:33,462 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 16:59:33,462 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:33,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:33,462 INFO L85 PathProgramCache]: Analyzing trace with hash -597676791, now seen corresponding path program 8 times [2025-02-07 16:59:33,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:33,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391930793] [2025-02-07 16:59:33,463 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 16:59:33,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:33,470 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-07 16:59:33,572 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 16:59:33,573 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 16:59:33,573 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 16:59:33,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1356753298] [2025-02-07 16:59:33,576 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 16:59:33,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:33,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:59:33,578 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 16:59:33,580 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 16:59:33,628 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-07 16:59:33,737 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 16:59:33,737 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 16:59:33,737 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:33,740 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-02-07 16:59:33,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:59:33,751 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 11 treesize of output 7 [2025-02-07 16:59:33,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-02-07 16:59:33,781 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:33,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 30 treesize of output 32 [2025-02-07 16:59:33,805 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:33,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2025-02-07 16:59:33,839 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:33,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2025-02-07 16:59:33,880 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:33,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2025-02-07 16:59:33,956 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:33,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 64 treesize of output 71 [2025-02-07 16:59:33,998 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:33,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 71 [2025-02-07 16:59:34,046 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:34,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 71 [2025-02-07 16:59:34,096 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:34,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 71 [2025-02-07 16:59:34,153 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:34,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 71 [2025-02-07 16:59:34,198 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:34,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 71 [2025-02-07 16:59:34,307 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 16:59:34,307 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:59:48,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2025-02-07 16:59:48,166 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:48,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 95 [2025-02-07 16:59:48,375 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:48,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13578073 treesize of output 13561616 [2025-02-07 16:59:49,828 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 16:59:49,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:49,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391930793] [2025-02-07 16:59:49,829 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 16:59:49,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356753298] [2025-02-07 16:59:49,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356753298] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:59:49,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 16:59:49,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2025-02-07 16:59:49,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371600914] [2025-02-07 16:59:49,829 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 16:59:49,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-02-07 16:59:49,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:49,835 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-02-07 16:59:49,836 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2025-02-07 16:59:49,836 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 33 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 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 17:00:44,790 WARN L286 SmtUtils]: Spent 5.84s on a formula simplification. DAG size of input: 105 DAG size of output: 95 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-02-07 17:00:49,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:00:49,984 INFO L93 Difference]: Finished difference Result 185 states and 217 transitions. [2025-02-07 17:00:49,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-02-07 17:00:49,985 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 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 17:00:49,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:00:49,986 INFO L225 Difference]: With dead ends: 185 [2025-02-07 17:00:49,986 INFO L226 Difference]: Without dead ends: 183 [2025-02-07 17:00:49,987 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 65.7s TimeCoverageRelationStatistics Valid=502, Invalid=2578, Unknown=0, NotChecked=0, Total=3080 [2025-02-07 17:00:49,987 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 237 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2025-02-07 17:00:49,987 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 146 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2025-02-07 17:00:49,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2025-02-07 17:00:50,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 83. [2025-02-07 17:00:50,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.3048780487804879) internal successors, (107), 82 states have internal predecessors, (107), 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 17:00:50,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 107 transitions. [2025-02-07 17:00:50,021 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 107 transitions. Word has length 19 [2025-02-07 17:00:50,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:00:50,021 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 107 transitions. [2025-02-07 17:00:50,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 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 17:00:50,021 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 107 transitions. [2025-02-07 17:00:50,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-02-07 17:00:50,023 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:00:50,023 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:00:50,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-07 17:00:50,227 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 17:00:50,227 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:00:50,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:00:50,227 INFO L85 PathProgramCache]: Analyzing trace with hash -2130547072, now seen corresponding path program 3 times [2025-02-07 17:00:50,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:00:50,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007627061] [2025-02-07 17:00:50,228 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:00:50,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:00:50,240 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 4 equivalence classes. [2025-02-07 17:00:50,310 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 20 of 20 statements. [2025-02-07 17:00:50,311 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 17:00:50,312 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 17:00:50,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1239057927] [2025-02-07 17:00:50,316 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:00:50,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:00:50,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:00:50,320 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 17:00:50,323 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 17:00:50,375 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 4 equivalence classes. [2025-02-07 17:00:50,912 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 20 of 20 statements. [2025-02-07 17:00:50,913 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 17:00:50,913 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:00:50,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-02-07 17:00:50,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:00:50,931 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 11 treesize of output 7 [2025-02-07 17:00:50,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-02-07 17:00:50,965 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:00:50,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 30 treesize of output 32 [2025-02-07 17:00:50,991 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:00:50,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2025-02-07 17:00:51,026 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:00:51,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2025-02-07 17:00:51,076 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:00:51,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 59 [2025-02-07 17:00:51,109 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:00:51,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 59 [2025-02-07 17:00:51,157 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:00:51,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 59 [2025-02-07 17:00:51,203 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:00:51,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 59 [2025-02-07 17:00:51,247 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:00:51,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 59 [2025-02-07 17:00:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:51,437 INFO L312 TraceCheckSpWp]: Computing backward predicates...