./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_m2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum_m2.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 64e2b591ee375a99f019d69fefe326e9fd46db25f76a67e4f3bee333adbec68f --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 17:07:47,770 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 17:07:47,845 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 17:07:47,854 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 17:07:47,856 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 17:07:47,881 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 17:07:47,882 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 17:07:47,882 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 17:07:47,883 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 17:07:47,883 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 17:07:47,883 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 17:07:47,883 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 17:07:47,883 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 17:07:47,883 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 17:07:47,884 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 17:07:47,884 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 17:07:47,884 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 17:07:47,884 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 17:07:47,884 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 17:07:47,884 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 17:07:47,884 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 17:07:47,884 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 17:07:47,885 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 17:07:47,885 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 17:07:47,885 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 17:07:47,885 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 17:07:47,885 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 17:07:47,885 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 17:07:47,885 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 17:07:47,885 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 17:07:47,885 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 17:07:47,886 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 17:07:47,886 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 17:07:47,886 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 17:07:47,886 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 17:07:47,886 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 17:07:47,886 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 17:07:47,886 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 17:07:47,886 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 17:07:47,887 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 17:07:47,887 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 17:07:47,887 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 17:07:47,887 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 17:07:47,887 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 -> 64e2b591ee375a99f019d69fefe326e9fd46db25f76a67e4f3bee333adbec68f [2025-02-07 17:07:48,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 17:07:48,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 17:07:48,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 17:07:48,145 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 17:07:48,145 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 17:07:48,147 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_m2.c [2025-02-07 17:07:49,477 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/15d6305d0/e271ec90b5334b50b00e7e69a7b3e98a/FLAGdd8585406 [2025-02-07 17:07:49,713 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 17:07:49,714 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m2.c [2025-02-07 17:07:49,721 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/15d6305d0/e271ec90b5334b50b00e7e69a7b3e98a/FLAGdd8585406 [2025-02-07 17:07:50,048 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/15d6305d0/e271ec90b5334b50b00e7e69a7b3e98a [2025-02-07 17:07:50,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 17:07:50,051 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 17:07:50,052 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 17:07:50,052 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 17:07:50,055 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 17:07:50,056 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 05:07:50" (1/1) ... [2025-02-07 17:07:50,057 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f3d6776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:07:50, skipping insertion in model container [2025-02-07 17:07:50,057 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 05:07:50" (1/1) ... [2025-02-07 17:07:50,070 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 17:07:50,197 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m2.c[402,415] [2025-02-07 17:07:50,218 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 17:07:50,226 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 17:07:50,236 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m2.c[402,415] [2025-02-07 17:07:50,244 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 17:07:50,262 INFO L204 MainTranslator]: Completed translation [2025-02-07 17:07:50,263 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:07:50 WrapperNode [2025-02-07 17:07:50,263 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 17:07:50,264 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 17:07:50,265 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 17:07:50,265 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 17:07:50,269 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:07:50" (1/1) ... [2025-02-07 17:07:50,272 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:07:50" (1/1) ... [2025-02-07 17:07:50,283 INFO L138 Inliner]: procedures = 15, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2025-02-07 17:07:50,283 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 17:07:50,284 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 17:07:50,284 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 17:07:50,284 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 17:07:50,289 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:07:50" (1/1) ... [2025-02-07 17:07:50,289 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:07:50" (1/1) ... [2025-02-07 17:07:50,290 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:07:50" (1/1) ... [2025-02-07 17:07:50,301 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-02-07 17:07:50,301 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:07:50" (1/1) ... [2025-02-07 17:07:50,301 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:07:50" (1/1) ... [2025-02-07 17:07:50,305 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:07:50" (1/1) ... [2025-02-07 17:07:50,305 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:07:50" (1/1) ... [2025-02-07 17:07:50,306 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:07:50" (1/1) ... [2025-02-07 17:07:50,307 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:07:50" (1/1) ... [2025-02-07 17:07:50,308 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 17:07:50,309 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 17:07:50,309 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 17:07:50,309 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 17:07:50,310 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:07:50" (1/1) ... [2025-02-07 17:07:50,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 17:07:50,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:50,338 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-07 17:07:50,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-07 17:07:50,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 17:07:50,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 17:07:50,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-07 17:07:50,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-07 17:07:50,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-07 17:07:50,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-07 17:07:50,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 17:07:50,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 17:07:50,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-07 17:07:50,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-07 17:07:50,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-07 17:07:50,410 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 17:07:50,411 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 17:07:50,540 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-02-07 17:07:50,540 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 17:07:50,549 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 17:07:50,550 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 17:07:50,550 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 05:07:50 BoogieIcfgContainer [2025-02-07 17:07:50,550 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 17:07:50,553 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 17:07:50,553 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 17:07:50,557 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 17:07:50,557 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 05:07:50" (1/3) ... [2025-02-07 17:07:50,558 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dfe0360 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 05:07:50, skipping insertion in model container [2025-02-07 17:07:50,559 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:07:50" (2/3) ... [2025-02-07 17:07:50,560 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dfe0360 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 05:07:50, skipping insertion in model container [2025-02-07 17:07:50,560 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 05:07:50" (3/3) ... [2025-02-07 17:07:50,561 INFO L128 eAbstractionObserver]: Analyzing ICFG zero_sum_m2.c [2025-02-07 17:07:50,575 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 17:07:50,577 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG zero_sum_m2.c that has 1 procedures, 14 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2025-02-07 17:07:50,628 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 17:07:50,638 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;@4a3d7b9b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 17:07:50,639 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 17:07:50,642 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 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 17:07:50,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-07 17:07:50,646 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:50,647 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:50,647 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:50,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:50,652 INFO L85 PathProgramCache]: Analyzing trace with hash -657582294, now seen corresponding path program 1 times [2025-02-07 17:07:50,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:50,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211622337] [2025-02-07 17:07:50,660 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:07:50,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:50,712 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-07 17:07:50,729 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-07 17:07:50,730 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:07:50,731 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:50,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:07:50,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:50,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211622337] [2025-02-07 17:07:50,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211622337] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 17:07:50,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 17:07:50,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-07 17:07:50,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352419402] [2025-02-07 17:07:50,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 17:07:50,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-07 17:07:50,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:50,882 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-07 17:07:50,882 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 17:07:50,884 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:50,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:50,935 INFO L93 Difference]: Finished difference Result 26 states and 37 transitions. [2025-02-07 17:07:50,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-07 17:07:50,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 17:07:50,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:50,942 INFO L225 Difference]: With dead ends: 26 [2025-02-07 17:07:50,942 INFO L226 Difference]: Without dead ends: 11 [2025-02-07 17:07:50,944 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 17:07:50,946 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:50,947 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:07:50,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2025-02-07 17:07:50,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2025-02-07 17:07:50,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 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 17:07:50,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2025-02-07 17:07:50,970 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 9 [2025-02-07 17:07:50,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:50,970 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2025-02-07 17:07:50,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:50,970 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2025-02-07 17:07:50,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-02-07 17:07:50,971 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:50,971 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:50,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 17:07:50,972 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:50,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:50,972 INFO L85 PathProgramCache]: Analyzing trace with hash 371802649, now seen corresponding path program 1 times [2025-02-07 17:07:50,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:50,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707780797] [2025-02-07 17:07:50,972 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:07:50,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:50,982 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-07 17:07:50,995 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-07 17:07:50,998 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:07:50,998 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:51,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 17:07:51,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:51,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707780797] [2025-02-07 17:07:51,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707780797] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 17:07:51,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 17:07:51,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-07 17:07:51,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388852222] [2025-02-07 17:07:51,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 17:07:51,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-07 17:07:51,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:51,076 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-07 17:07:51,076 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-07 17:07:51,076 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:51,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:51,118 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2025-02-07 17:07:51,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-07 17:07:51,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 17:07:51,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:51,119 INFO L225 Difference]: With dead ends: 21 [2025-02-07 17:07:51,119 INFO L226 Difference]: Without dead ends: 15 [2025-02-07 17:07:51,119 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-07 17:07:51,120 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:51,121 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 6 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:07:51,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2025-02-07 17:07:51,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2025-02-07 17:07:51,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:51,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2025-02-07 17:07:51,127 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 10 [2025-02-07 17:07:51,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:51,127 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2025-02-07 17:07:51,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:51,128 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2025-02-07 17:07:51,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-02-07 17:07:51,128 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:51,128 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:51,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-07 17:07:51,129 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:51,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:51,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1376172391, now seen corresponding path program 1 times [2025-02-07 17:07:51,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:51,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588357778] [2025-02-07 17:07:51,131 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:07:51,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:51,145 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-07 17:07:51,171 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-07 17:07:51,172 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:07:51,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:51,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 17:07:51,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:51,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588357778] [2025-02-07 17:07:51,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588357778] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:51,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444679667] [2025-02-07 17:07:51,276 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:07:51,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:51,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:51,280 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:51,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-07 17:07:51,328 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-07 17:07:51,351 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-07 17:07:51,351 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:07:51,351 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:51,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-07 17:07:51,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 17:07:51,424 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 17:07:51,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444679667] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:51,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:51,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-02-07 17:07:51,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127846504] [2025-02-07 17:07:51,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:51,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-07 17:07:51,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:51,456 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-07 17:07:51,457 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2025-02-07 17:07:51,457 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:51,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:51,501 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2025-02-07 17:07:51,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-07 17:07:51,502 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-02-07 17:07:51,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:51,502 INFO L225 Difference]: With dead ends: 27 [2025-02-07 17:07:51,502 INFO L226 Difference]: Without dead ends: 16 [2025-02-07 17:07:51,503 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2025-02-07 17:07:51,504 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:51,505 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:07:51,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2025-02-07 17:07:51,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2025-02-07 17:07:51,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 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 17:07:51,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2025-02-07 17:07:51,511 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 14 [2025-02-07 17:07:51,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:51,512 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2025-02-07 17:07:51,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:51,512 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2025-02-07 17:07:51,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-02-07 17:07:51,513 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:51,513 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:51,521 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 17:07:51,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:51,718 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:51,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:51,719 INFO L85 PathProgramCache]: Analyzing trace with hash -723609334, now seen corresponding path program 2 times [2025-02-07 17:07:51,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:51,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112022363] [2025-02-07 17:07:51,719 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:07:51,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:51,727 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-02-07 17:07:51,742 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-02-07 17:07:51,742 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:07:51,742 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 17:07:51,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:51,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112022363] [2025-02-07 17:07:51,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112022363] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:51,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438290070] [2025-02-07 17:07:51,847 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:07:51,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:51,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:51,850 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:51,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-07 17:07:51,891 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-02-07 17:07:51,912 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-02-07 17:07:51,912 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:07:51,913 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:51,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-07 17:07:51,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:51,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 17:07:51,961 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 17:07:51,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438290070] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:51,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:51,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-02-07 17:07:51,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385723114] [2025-02-07 17:07:51,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:51,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-07 17:07:51,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:51,999 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-07 17:07:52,001 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-02-07 17:07:52,001 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:52,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:52,054 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2025-02-07 17:07:52,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 17:07:52,054 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-02-07 17:07:52,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:52,054 INFO L225 Difference]: With dead ends: 29 [2025-02-07 17:07:52,054 INFO L226 Difference]: Without dead ends: 20 [2025-02-07 17:07:52,055 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-02-07 17:07:52,055 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:52,055 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 10 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:07:52,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-02-07 17:07:52,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-02-07 17:07:52,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:52,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2025-02-07 17:07:52,062 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 15 [2025-02-07 17:07:52,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:52,063 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2025-02-07 17:07:52,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:52,063 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2025-02-07 17:07:52,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-07 17:07:52,064 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:52,064 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:52,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-07 17:07:52,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:52,265 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:52,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:52,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1271909238, now seen corresponding path program 3 times [2025-02-07 17:07:52,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:52,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538964982] [2025-02-07 17:07:52,265 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:07:52,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:52,280 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-02-07 17:07:52,323 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 17:07:52,326 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-07 17:07:52,327 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:53,458 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:07:53,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:53,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538964982] [2025-02-07 17:07:53,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538964982] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:53,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423886605] [2025-02-07 17:07:53,459 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:07:53,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:53,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:53,463 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:53,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-07 17:07:53,509 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-02-07 17:07:53,530 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 17:07:53,530 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-07 17:07:53,530 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:53,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-02-07 17:07:53,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:53,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:07:53,823 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:07:53,823 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:54,216 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 17:07:54,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423886605] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:54,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:54,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 14] total 31 [2025-02-07 17:07:54,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821377555] [2025-02-07 17:07:54,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:54,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-02-07 17:07:54,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:54,218 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-02-07 17:07:54,219 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2025-02-07 17:07:54,220 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:54,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:54,460 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2025-02-07 17:07:54,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-07 17:07:54,461 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2025-02-07 17:07:54,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:54,462 INFO L225 Difference]: With dead ends: 33 [2025-02-07 17:07:54,462 INFO L226 Difference]: Without dead ends: 30 [2025-02-07 17:07:54,463 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2025-02-07 17:07:54,463 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:54,463 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 68 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:07:54,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-02-07 17:07:54,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2025-02-07 17:07:54,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 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 17:07:54,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2025-02-07 17:07:54,474 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 19 [2025-02-07 17:07:54,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:54,475 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2025-02-07 17:07:54,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:54,475 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2025-02-07 17:07:54,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-02-07 17:07:54,475 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:54,476 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:54,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-07 17:07:54,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:54,677 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:54,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:54,677 INFO L85 PathProgramCache]: Analyzing trace with hash -774448967, now seen corresponding path program 4 times [2025-02-07 17:07:54,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:54,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206458593] [2025-02-07 17:07:54,677 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:07:54,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:54,686 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-02-07 17:07:54,690 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 16 of 20 statements. [2025-02-07 17:07:54,690 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:07:54,690 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:54,769 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-07 17:07:54,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:54,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206458593] [2025-02-07 17:07:54,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206458593] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:54,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396391132] [2025-02-07 17:07:54,770 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:07:54,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:54,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:54,772 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:54,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-07 17:07:54,810 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-02-07 17:07:54,819 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 16 of 20 statements. [2025-02-07 17:07:54,819 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:07:54,820 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:54,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 17:07:54,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-07 17:07:54,886 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:54,939 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-07 17:07:54,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396391132] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:54,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:54,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2025-02-07 17:07:54,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811435348] [2025-02-07 17:07:54,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:54,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-07 17:07:54,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:54,940 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-07 17:07:54,940 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-02-07 17:07:54,941 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:55,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:55,056 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2025-02-07 17:07:55,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-07 17:07:55,057 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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 20 [2025-02-07 17:07:55,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:55,057 INFO L225 Difference]: With dead ends: 52 [2025-02-07 17:07:55,057 INFO L226 Difference]: Without dead ends: 33 [2025-02-07 17:07:55,058 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2025-02-07 17:07:55,058 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:55,058 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 25 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:07:55,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-02-07 17:07:55,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2025-02-07 17:07:55,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 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 17:07:55,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2025-02-07 17:07:55,064 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 20 [2025-02-07 17:07:55,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:55,064 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2025-02-07 17:07:55,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:55,064 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2025-02-07 17:07:55,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-02-07 17:07:55,065 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:55,065 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:55,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-07 17:07:55,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-02-07 17:07:55,266 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:55,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:55,266 INFO L85 PathProgramCache]: Analyzing trace with hash -2026604391, now seen corresponding path program 5 times [2025-02-07 17:07:55,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:55,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352253626] [2025-02-07 17:07:55,266 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:07:55,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:55,277 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 3 equivalence classes. [2025-02-07 17:07:55,289 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-02-07 17:07:55,290 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-07 17:07:55,290 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-07 17:07:55,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:55,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352253626] [2025-02-07 17:07:55,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352253626] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:55,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752113155] [2025-02-07 17:07:55,390 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:07:55,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:55,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:55,392 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:55,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-07 17:07:55,442 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 3 equivalence classes. [2025-02-07 17:07:55,462 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-02-07 17:07:55,462 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-07 17:07:55,462 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:55,463 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 17:07:55,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:55,518 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-07 17:07:55,518 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:55,571 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-07 17:07:55,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752113155] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:55,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:55,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2025-02-07 17:07:55,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887619636] [2025-02-07 17:07:55,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:55,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-07 17:07:55,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:55,573 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-07 17:07:55,573 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-02-07 17:07:55,573 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:55,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:55,679 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2025-02-07 17:07:55,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-07 17:07:55,680 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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 20 [2025-02-07 17:07:55,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:55,681 INFO L225 Difference]: With dead ends: 33 [2025-02-07 17:07:55,681 INFO L226 Difference]: Without dead ends: 24 [2025-02-07 17:07:55,681 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2025-02-07 17:07:55,682 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:55,682 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 21 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:07:55,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-02-07 17:07:55,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2025-02-07 17:07:55,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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 17:07:55,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2025-02-07 17:07:55,689 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 20 [2025-02-07 17:07:55,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:55,690 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2025-02-07 17:07:55,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:55,690 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2025-02-07 17:07:55,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-02-07 17:07:55,691 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:55,691 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:55,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-07 17:07:55,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:55,892 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:55,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:55,892 INFO L85 PathProgramCache]: Analyzing trace with hash 713193610, now seen corresponding path program 6 times [2025-02-07 17:07:55,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:55,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198256609] [2025-02-07 17:07:55,892 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:07:55,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:55,900 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 23 statements into 3 equivalence classes. [2025-02-07 17:07:55,911 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 23 of 23 statements. [2025-02-07 17:07:55,911 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-07 17:07:55,911 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:55,995 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-07 17:07:55,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:55,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198256609] [2025-02-07 17:07:55,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198256609] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:55,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074574509] [2025-02-07 17:07:55,996 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:07:55,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:55,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:55,998 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:56,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-07 17:07:56,037 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 23 statements into 3 equivalence classes. [2025-02-07 17:07:56,056 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 23 of 23 statements. [2025-02-07 17:07:56,056 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-07 17:07:56,056 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:56,057 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 17:07:56,058 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:56,128 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-07 17:07:56,128 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:56,196 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-07 17:07:56,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074574509] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:56,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:56,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2025-02-07 17:07:56,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57911952] [2025-02-07 17:07:56,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:56,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-07 17:07:56,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:56,197 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-07 17:07:56,197 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2025-02-07 17:07:56,197 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:56,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:56,254 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2025-02-07 17:07:56,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-07 17:07:56,255 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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 23 [2025-02-07 17:07:56,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:56,255 INFO L225 Difference]: With dead ends: 44 [2025-02-07 17:07:56,255 INFO L226 Difference]: Without dead ends: 25 [2025-02-07 17:07:56,255 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2025-02-07 17:07:56,259 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:56,259 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:07:56,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-02-07 17:07:56,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2025-02-07 17:07:56,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:56,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2025-02-07 17:07:56,265 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 23 [2025-02-07 17:07:56,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:56,265 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2025-02-07 17:07:56,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:56,266 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2025-02-07 17:07:56,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-02-07 17:07:56,267 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:56,267 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:56,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-07 17:07:56,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-02-07 17:07:56,467 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:56,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:56,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1340364089, now seen corresponding path program 7 times [2025-02-07 17:07:56,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:56,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014736772] [2025-02-07 17:07:56,468 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:07:56,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:56,478 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-07 17:07:56,529 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-07 17:07:56,532 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:07:56,533 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:58,043 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:07:58,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:58,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014736772] [2025-02-07 17:07:58,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014736772] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:58,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999992178] [2025-02-07 17:07:58,044 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:07:58,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:58,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:58,046 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:58,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-07 17:07:58,086 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-07 17:07:58,107 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-07 17:07:58,108 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:07:58,108 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:58,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 66 conjuncts are in the unsatisfiable core [2025-02-07 17:07:58,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:58,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:07:58,562 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:07:58,562 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 17:07:59,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999992178] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:59,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:59,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 18] total 47 [2025-02-07 17:07:59,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379954032] [2025-02-07 17:07:59,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:59,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-02-07 17:07:59,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:59,168 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-02-07 17:07:59,169 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2009, Unknown=0, NotChecked=0, Total=2162 [2025-02-07 17:07:59,169 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 47 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:59,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:59,929 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2025-02-07 17:07:59,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-07 17:07:59,929 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 states have internal predecessors, (58), 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 24 [2025-02-07 17:07:59,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:59,930 INFO L225 Difference]: With dead ends: 41 [2025-02-07 17:07:59,931 INFO L226 Difference]: Without dead ends: 38 [2025-02-07 17:07:59,933 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=220, Invalid=2750, Unknown=0, NotChecked=0, Total=2970 [2025-02-07 17:07:59,933 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:59,934 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 70 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-07 17:07:59,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-02-07 17:07:59,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2025-02-07 17:07:59,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:59,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2025-02-07 17:07:59,944 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 24 [2025-02-07 17:07:59,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:59,945 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2025-02-07 17:07:59,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:59,945 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2025-02-07 17:07:59,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-02-07 17:07:59,946 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:59,946 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:59,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-07 17:08:00,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:00,151 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:08:00,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:08:00,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1398354454, now seen corresponding path program 8 times [2025-02-07 17:08:00,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:08:00,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542536311] [2025-02-07 17:08:00,152 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:08:00,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:08:00,158 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-02-07 17:08:00,164 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-07 17:08:00,164 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:08:00,164 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-07 17:08:00,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:08:00,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542536311] [2025-02-07 17:08:00,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542536311] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:08:00,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81281876] [2025-02-07 17:08:00,271 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:08:00,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:00,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:08:00,273 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:08:00,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-07 17:08:00,313 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-02-07 17:08:00,330 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-07 17:08:00,330 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:08:00,330 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:00,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-07 17:08:00,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:08:00,419 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-07 17:08:00,420 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:08:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-07 17:08:00,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81281876] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:08:00,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:08:00,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-02-07 17:08:00,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714628659] [2025-02-07 17:08:00,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:08:00,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-07 17:08:00,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:08:00,493 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-07 17:08:00,493 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2025-02-07 17:08:00,493 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 17:08:00,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:08:00,590 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2025-02-07 17:08:00,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-07 17:08:00,591 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 25 [2025-02-07 17:08:00,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:08:00,591 INFO L225 Difference]: With dead ends: 68 [2025-02-07 17:08:00,591 INFO L226 Difference]: Without dead ends: 36 [2025-02-07 17:08:00,592 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2025-02-07 17:08:00,592 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:08:00,592 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:08:00,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-02-07 17:08:00,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2025-02-07 17:08:00,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:00,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2025-02-07 17:08:00,598 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 25 [2025-02-07 17:08:00,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:08:00,598 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2025-02-07 17:08:00,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 17:08:00,599 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2025-02-07 17:08:00,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-02-07 17:08:00,599 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:08:00,599 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:08:00,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-07 17:08:00,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:00,800 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:08:00,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:08:00,801 INFO L85 PathProgramCache]: Analyzing trace with hash 17054425, now seen corresponding path program 9 times [2025-02-07 17:08:00,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:08:00,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484608] [2025-02-07 17:08:00,801 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:08:00,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:08:00,808 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 3 equivalence classes. [2025-02-07 17:08:00,817 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-02-07 17:08:00,818 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-07 17:08:00,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:00,922 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-07 17:08:00,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:08:00,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484608] [2025-02-07 17:08:00,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484608] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:08:00,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535756364] [2025-02-07 17:08:00,923 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:08:00,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:00,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:08:00,925 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:08:00,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-07 17:08:00,966 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 3 equivalence classes. [2025-02-07 17:08:00,991 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-02-07 17:08:00,991 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-07 17:08:00,992 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:00,993 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-07 17:08:00,994 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:08:01,073 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-07 17:08:01,073 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:08:01,166 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-07 17:08:01,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535756364] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:08:01,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:08:01,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-02-07 17:08:01,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319016552] [2025-02-07 17:08:01,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:08:01,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-07 17:08:01,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:08:01,167 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-07 17:08:01,167 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2025-02-07 17:08:01,167 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 17:08:01,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:08:01,257 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2025-02-07 17:08:01,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 17:08:01,258 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 26 [2025-02-07 17:08:01,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:08:01,258 INFO L225 Difference]: With dead ends: 51 [2025-02-07 17:08:01,258 INFO L226 Difference]: Without dead ends: 30 [2025-02-07 17:08:01,258 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2025-02-07 17:08:01,259 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:08:01,259 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 20 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:08:01,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-02-07 17:08:01,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2025-02-07 17:08:01,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 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 17:08:01,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2025-02-07 17:08:01,265 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 26 [2025-02-07 17:08:01,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:08:01,265 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2025-02-07 17:08:01,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 17:08:01,265 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2025-02-07 17:08:01,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-02-07 17:08:01,266 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:08:01,266 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:08:01,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-07 17:08:01,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:01,467 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:08:01,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:08:01,467 INFO L85 PathProgramCache]: Analyzing trace with hash -111863318, now seen corresponding path program 10 times [2025-02-07 17:08:01,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:08:01,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788661175] [2025-02-07 17:08:01,467 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:08:01,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:08:01,477 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-02-07 17:08:01,495 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-07 17:08:01,496 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:08:01,496 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:02,864 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 17:08:02,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:08:02,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788661175] [2025-02-07 17:08:02,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788661175] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:08:02,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122840644] [2025-02-07 17:08:02,865 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:08:02,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:02,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:08:02,867 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:08:02,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-07 17:08:02,905 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-02-07 17:08:02,924 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-07 17:08:02,924 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:08:02,924 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:02,925 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 83 conjuncts are in the unsatisfiable core [2025-02-07 17:08:02,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:08:03,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:08:03,804 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:08:03,805 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:08:04,535 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 17:08:04,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122840644] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:08:04,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:08:04,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26, 22] total 60 [2025-02-07 17:08:04,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137520664] [2025-02-07 17:08:04,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:08:04,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2025-02-07 17:08:04,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:08:04,537 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2025-02-07 17:08:04,538 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3348, Unknown=0, NotChecked=0, Total=3540 [2025-02-07 17:08:04,538 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 60 states, 60 states have (on average 1.15) internal successors, (69), 60 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:05,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:08:05,783 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2025-02-07 17:08:05,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-07 17:08:05,783 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.15) internal successors, (69), 60 states have internal predecessors, (69), 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 29 [2025-02-07 17:08:05,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:08:05,784 INFO L225 Difference]: With dead ends: 49 [2025-02-07 17:08:05,784 INFO L226 Difference]: Without dead ends: 46 [2025-02-07 17:08:05,785 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=313, Invalid=4943, Unknown=0, NotChecked=0, Total=5256 [2025-02-07 17:08:05,785 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-02-07 17:08:05,786 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 91 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-02-07 17:08:05,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-02-07 17:08:05,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2025-02-07 17:08:05,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 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 17:08:05,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2025-02-07 17:08:05,793 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 29 [2025-02-07 17:08:05,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:08:05,793 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2025-02-07 17:08:05,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.15) internal successors, (69), 60 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:05,793 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2025-02-07 17:08:05,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-02-07 17:08:05,794 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:08:05,794 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:08:05,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-07 17:08:05,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-07 17:08:05,995 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:08:05,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:08:05,995 INFO L85 PathProgramCache]: Analyzing trace with hash 827236185, now seen corresponding path program 11 times [2025-02-07 17:08:05,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:08:05,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549960554] [2025-02-07 17:08:05,995 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:08:05,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:08:06,001 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 4 equivalence classes. [2025-02-07 17:08:06,014 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 30 of 30 statements. [2025-02-07 17:08:06,014 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-07 17:08:06,015 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:06,140 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-07 17:08:06,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:08:06,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549960554] [2025-02-07 17:08:06,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549960554] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:08:06,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942591811] [2025-02-07 17:08:06,141 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:08:06,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:06,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:08:06,144 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:08:06,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-07 17:08:06,187 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 4 equivalence classes. [2025-02-07 17:08:06,239 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 30 of 30 statements. [2025-02-07 17:08:06,239 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-07 17:08:06,239 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:06,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 17:08:06,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:08:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-07 17:08:06,352 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:08:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-07 17:08:06,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942591811] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:08:06,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:08:06,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2025-02-07 17:08:06,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83365414] [2025-02-07 17:08:06,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:08:06,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-07 17:08:06,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:08:06,431 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-07 17:08:06,431 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2025-02-07 17:08:06,431 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 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 17:08:06,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:08:06,567 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2025-02-07 17:08:06,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-07 17:08:06,568 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 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 30 [2025-02-07 17:08:06,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:08:06,568 INFO L225 Difference]: With dead ends: 76 [2025-02-07 17:08:06,568 INFO L226 Difference]: Without dead ends: 47 [2025-02-07 17:08:06,569 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2025-02-07 17:08:06,569 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:08:06,569 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 22 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:08:06,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2025-02-07 17:08:06,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2025-02-07 17:08:06,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 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 17:08:06,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2025-02-07 17:08:06,579 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 30 [2025-02-07 17:08:06,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:08:06,580 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2025-02-07 17:08:06,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 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 17:08:06,580 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2025-02-07 17:08:06,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-02-07 17:08:06,580 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:08:06,580 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:08:06,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-07 17:08:06,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-02-07 17:08:06,785 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:08:06,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:08:06,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1877913799, now seen corresponding path program 12 times [2025-02-07 17:08:06,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:08:06,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093835531] [2025-02-07 17:08:06,786 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:08:06,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:08:06,792 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 30 statements into 4 equivalence classes. [2025-02-07 17:08:06,801 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 30 of 30 statements. [2025-02-07 17:08:06,801 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-02-07 17:08:06,801 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:06,914 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-07 17:08:06,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:08:06,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093835531] [2025-02-07 17:08:06,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093835531] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:08:06,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500787172] [2025-02-07 17:08:06,914 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:08:06,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:06,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:08:06,917 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:08:06,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-07 17:08:06,961 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 30 statements into 4 equivalence classes. [2025-02-07 17:08:06,987 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 30 of 30 statements. [2025-02-07 17:08:06,987 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-02-07 17:08:06,988 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:06,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 17:08:06,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:08:07,082 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-07 17:08:07,082 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:08:07,140 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-07 17:08:07,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500787172] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:08:07,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:08:07,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2025-02-07 17:08:07,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337487101] [2025-02-07 17:08:07,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:08:07,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-07 17:08:07,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:08:07,142 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-07 17:08:07,142 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2025-02-07 17:08:07,142 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:07,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:08:07,189 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2025-02-07 17:08:07,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 17:08:07,189 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2025-02-07 17:08:07,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:08:07,190 INFO L225 Difference]: With dead ends: 80 [2025-02-07 17:08:07,190 INFO L226 Difference]: Without dead ends: 44 [2025-02-07 17:08:07,190 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2025-02-07 17:08:07,190 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:08:07,191 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:08:07,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-02-07 17:08:07,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2025-02-07 17:08:07,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:07,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2025-02-07 17:08:07,197 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 30 [2025-02-07 17:08:07,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:08:07,197 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2025-02-07 17:08:07,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:07,198 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2025-02-07 17:08:07,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-02-07 17:08:07,198 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:08:07,198 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:08:07,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-07 17:08:07,403 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:07,403 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:08:07,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:08:07,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1359847338, now seen corresponding path program 13 times [2025-02-07 17:08:07,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:08:07,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975322915] [2025-02-07 17:08:07,403 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:08:07,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:08:07,409 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-07 17:08:07,415 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-07 17:08:07,415 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:08:07,415 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:07,559 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-02-07 17:08:07,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:08:07,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975322915] [2025-02-07 17:08:07,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975322915] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:08:07,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443563590] [2025-02-07 17:08:07,560 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:08:07,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:07,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:08:07,563 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:08:07,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-07 17:08:07,609 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-07 17:08:07,631 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-07 17:08:07,631 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:08:07,631 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:07,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 17:08:07,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:08:07,731 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-02-07 17:08:07,731 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:08:07,823 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-02-07 17:08:07,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443563590] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:08:07,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:08:07,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2025-02-07 17:08:07,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725849028] [2025-02-07 17:08:07,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:08:07,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-07 17:08:07,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:08:07,824 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-07 17:08:07,824 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2025-02-07 17:08:07,824 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:07,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:08:07,924 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2025-02-07 17:08:07,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-07 17:08:07,925 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2025-02-07 17:08:07,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:08:07,925 INFO L225 Difference]: With dead ends: 48 [2025-02-07 17:08:07,925 INFO L226 Difference]: Without dead ends: 35 [2025-02-07 17:08:07,926 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2025-02-07 17:08:07,926 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:08:07,926 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 20 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:08:07,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2025-02-07 17:08:07,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2025-02-07 17:08:07,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:07,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2025-02-07 17:08:07,933 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 31 [2025-02-07 17:08:07,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:08:07,933 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2025-02-07 17:08:07,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:07,934 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2025-02-07 17:08:07,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-02-07 17:08:07,934 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:08:07,934 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:08:07,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-07 17:08:08,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:08,135 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:08:08,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:08:08,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1888379943, now seen corresponding path program 14 times [2025-02-07 17:08:08,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:08:08,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452847421] [2025-02-07 17:08:08,136 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:08:08,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:08:08,142 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-02-07 17:08:08,160 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-02-07 17:08:08,160 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:08:08,160 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:10,228 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:08:10,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:08:10,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452847421] [2025-02-07 17:08:10,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452847421] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:08:10,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299819066] [2025-02-07 17:08:10,228 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:08:10,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:10,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:08:10,231 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:08:10,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-07 17:08:10,272 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-02-07 17:08:10,301 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-02-07 17:08:10,301 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:08:10,301 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:10,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 99 conjuncts are in the unsatisfiable core [2025-02-07 17:08:10,306 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:08:10,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:08:10,983 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:08:10,984 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:08:12,184 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 17:08:12,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299819066] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:08:12,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:08:12,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 26] total 71 [2025-02-07 17:08:12,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215626427] [2025-02-07 17:08:12,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:08:12,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2025-02-07 17:08:12,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:08:12,185 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2025-02-07 17:08:12,186 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=4723, Unknown=0, NotChecked=0, Total=4970 [2025-02-07 17:08:12,187 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 71 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:13,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:08:13,636 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2025-02-07 17:08:13,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-02-07 17:08:13,637 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2025-02-07 17:08:13,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:08:13,637 INFO L225 Difference]: With dead ends: 57 [2025-02-07 17:08:13,637 INFO L226 Difference]: Without dead ends: 54 [2025-02-07 17:08:13,639 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1816 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=414, Invalid=7068, Unknown=0, NotChecked=0, Total=7482 [2025-02-07 17:08:13,639 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 1608 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-02-07 17:08:13,639 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 111 Invalid, 1630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1608 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-02-07 17:08:13,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-02-07 17:08:13,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2025-02-07 17:08:13,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:13,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2025-02-07 17:08:13,646 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 34 [2025-02-07 17:08:13,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:08:13,646 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2025-02-07 17:08:13,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:13,646 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2025-02-07 17:08:13,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-02-07 17:08:13,647 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:08:13,647 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:08:13,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-07 17:08:13,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-07 17:08:13,848 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:08:13,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:08:13,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1589795658, now seen corresponding path program 15 times [2025-02-07 17:08:13,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:08:13,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020035421] [2025-02-07 17:08:13,848 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:08:13,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:08:13,860 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 35 statements into 4 equivalence classes. [2025-02-07 17:08:13,880 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 35 of 35 statements. [2025-02-07 17:08:13,880 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 17:08:13,880 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:14,045 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-07 17:08:14,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:08:14,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020035421] [2025-02-07 17:08:14,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020035421] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:08:14,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726390709] [2025-02-07 17:08:14,046 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:08:14,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:14,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:08:14,048 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:08:14,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-07 17:08:14,101 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 35 statements into 4 equivalence classes. [2025-02-07 17:08:14,134 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 35 of 35 statements. [2025-02-07 17:08:14,134 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 17:08:14,134 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:14,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 17:08:14,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:08:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-07 17:08:14,250 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:08:14,340 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-07 17:08:14,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726390709] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:08:14,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:08:14,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2025-02-07 17:08:14,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670738927] [2025-02-07 17:08:14,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:08:14,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-07 17:08:14,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:08:14,341 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-07 17:08:14,341 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2025-02-07 17:08:14,341 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 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 17:08:14,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:08:14,528 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2025-02-07 17:08:14,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-07 17:08:14,528 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 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) Word has length 35 [2025-02-07 17:08:14,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:08:14,529 INFO L225 Difference]: With dead ends: 88 [2025-02-07 17:08:14,529 INFO L226 Difference]: Without dead ends: 54 [2025-02-07 17:08:14,529 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 51 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2025-02-07 17:08:14,530 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:08:14,530 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 26 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:08:14,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-02-07 17:08:14,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2025-02-07 17:08:14,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:14,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2025-02-07 17:08:14,543 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 35 [2025-02-07 17:08:14,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:08:14,543 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2025-02-07 17:08:14,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 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 17:08:14,543 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2025-02-07 17:08:14,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-02-07 17:08:14,547 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:08:14,547 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:08:14,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-07 17:08:14,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-07 17:08:14,747 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:08:14,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:08:14,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1243860054, now seen corresponding path program 16 times [2025-02-07 17:08:14,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:08:14,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116588098] [2025-02-07 17:08:14,748 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:08:14,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:08:14,753 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-02-07 17:08:14,757 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 28 of 35 statements. [2025-02-07 17:08:14,757 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:08:14,757 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:14,889 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-07 17:08:14,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:08:14,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116588098] [2025-02-07 17:08:14,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116588098] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:08:14,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243971420] [2025-02-07 17:08:14,890 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:08:14,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:14,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:08:14,893 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:08:14,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-07 17:08:14,946 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-02-07 17:08:14,962 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 28 of 35 statements. [2025-02-07 17:08:14,963 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:08:14,963 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:14,964 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 17:08:14,965 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:08:15,054 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-07 17:08:15,054 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:08:15,133 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-07 17:08:15,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243971420] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:08:15,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:08:15,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2025-02-07 17:08:15,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211010742] [2025-02-07 17:08:15,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:08:15,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-07 17:08:15,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:08:15,134 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-07 17:08:15,134 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2025-02-07 17:08:15,134 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 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 17:08:15,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:08:15,369 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2025-02-07 17:08:15,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-07 17:08:15,370 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 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 35 [2025-02-07 17:08:15,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:08:15,370 INFO L225 Difference]: With dead ends: 54 [2025-02-07 17:08:15,370 INFO L226 Difference]: Without dead ends: 39 [2025-02-07 17:08:15,371 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 51 SyntacticMatches, 13 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2025-02-07 17:08:15,371 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:08:15,371 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 21 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:08:15,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2025-02-07 17:08:15,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2025-02-07 17:08:15,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:15,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2025-02-07 17:08:15,378 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 35 [2025-02-07 17:08:15,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:08:15,378 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2025-02-07 17:08:15,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 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 17:08:15,378 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2025-02-07 17:08:15,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-02-07 17:08:15,379 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:08:15,379 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:08:15,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-02-07 17:08:15,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-07 17:08:15,579 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:08:15,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:08:15,580 INFO L85 PathProgramCache]: Analyzing trace with hash -2130610215, now seen corresponding path program 17 times [2025-02-07 17:08:15,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:08:15,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390719934] [2025-02-07 17:08:15,580 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:08:15,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:08:15,586 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 38 statements into 4 equivalence classes. [2025-02-07 17:08:15,599 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 38 of 38 statements. [2025-02-07 17:08:15,599 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-07 17:08:15,599 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2025-02-07 17:08:15,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:08:15,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390719934] [2025-02-07 17:08:15,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390719934] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:08:15,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838706362] [2025-02-07 17:08:15,749 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:08:15,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:15,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:08:15,752 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:08:15,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-07 17:08:15,808 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 38 statements into 4 equivalence classes. [2025-02-07 17:08:15,895 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 38 of 38 statements. [2025-02-07 17:08:15,896 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-07 17:08:15,896 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:15,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 17:08:15,899 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:08:16,022 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2025-02-07 17:08:16,022 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:08:16,101 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2025-02-07 17:08:16,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838706362] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:08:16,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:08:16,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2025-02-07 17:08:16,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550033070] [2025-02-07 17:08:16,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:08:16,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-07 17:08:16,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:08:16,102 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-07 17:08:16,102 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2025-02-07 17:08:16,102 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 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 17:08:16,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:08:16,155 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2025-02-07 17:08:16,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-07 17:08:16,155 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 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 38 [2025-02-07 17:08:16,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:08:16,156 INFO L225 Difference]: With dead ends: 71 [2025-02-07 17:08:16,156 INFO L226 Difference]: Without dead ends: 40 [2025-02-07 17:08:16,156 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 58 SyntacticMatches, 12 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2025-02-07 17:08:16,157 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:08:16,157 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:08:16,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-02-07 17:08:16,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2025-02-07 17:08:16,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:16,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2025-02-07 17:08:16,163 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 38 [2025-02-07 17:08:16,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:08:16,163 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2025-02-07 17:08:16,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 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 17:08:16,163 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2025-02-07 17:08:16,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-07 17:08:16,164 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:08:16,164 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:08:16,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-07 17:08:16,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:16,368 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:08:16,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:08:16,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1524811594, now seen corresponding path program 18 times [2025-02-07 17:08:16,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:08:16,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628375571] [2025-02-07 17:08:16,368 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:08:16,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:08:16,374 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 39 statements into 4 equivalence classes. [2025-02-07 17:08:16,411 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 17:08:16,411 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-02-07 17:08:16,411 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 17:08:18,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:08:18,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628375571] [2025-02-07 17:08:18,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628375571] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:08:18,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741250915] [2025-02-07 17:08:18,554 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:08:18,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:18,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:08:18,556 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:08:18,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-07 17:08:18,617 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 39 statements into 4 equivalence classes. [2025-02-07 17:08:18,645 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 17:08:18,645 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-02-07 17:08:18,645 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:18,647 WARN L254 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 129 conjuncts are in the unsatisfiable core [2025-02-07 17:08:18,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:08:18,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:08:20,666 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:08:20,666 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:08:23,167 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:08:23,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741250915] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:08:23,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:08:23,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 37, 38] total 102 [2025-02-07 17:08:23,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634080420] [2025-02-07 17:08:23,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:08:23,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2025-02-07 17:08:23,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:08:23,168 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2025-02-07 17:08:23,169 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=799, Invalid=9503, Unknown=0, NotChecked=0, Total=10302 [2025-02-07 17:08:23,170 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 102 states, 102 states have (on average 1.0490196078431373) internal successors, (107), 102 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 17:08:33,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:08:33,174 INFO L93 Difference]: Finished difference Result 197 states and 236 transitions. [2025-02-07 17:08:33,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2025-02-07 17:08:33,174 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.0490196078431373) internal successors, (107), 102 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) Word has length 39 [2025-02-07 17:08:33,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:08:33,176 INFO L225 Difference]: With dead ends: 197 [2025-02-07 17:08:33,176 INFO L226 Difference]: Without dead ends: 194 [2025-02-07 17:08:33,180 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9650 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=2129, Invalid=33781, Unknown=0, NotChecked=0, Total=35910 [2025-02-07 17:08:33,180 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 5140 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 5493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 5140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:08:33,181 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 112 Invalid, 5493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 5140 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2025-02-07 17:08:33,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2025-02-07 17:08:33,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 108. [2025-02-07 17:08:33,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:33,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 125 transitions. [2025-02-07 17:08:33,220 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 125 transitions. Word has length 39 [2025-02-07 17:08:33,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:08:33,220 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 125 transitions. [2025-02-07 17:08:33,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.0490196078431373) internal successors, (107), 102 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 17:08:33,221 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 125 transitions. [2025-02-07 17:08:33,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-02-07 17:08:33,221 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:08:33,221 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:08:33,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-02-07 17:08:33,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:33,422 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:08:33,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:08:33,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1612676615, now seen corresponding path program 19 times [2025-02-07 17:08:33,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:08:33,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772949426] [2025-02-07 17:08:33,422 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:08:33,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:08:33,431 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-07 17:08:33,437 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-07 17:08:33,437 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:08:33,437 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:33,619 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2025-02-07 17:08:33,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:08:33,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772949426] [2025-02-07 17:08:33,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772949426] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:08:33,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572877771] [2025-02-07 17:08:33,620 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:08:33,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:33,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:08:33,623 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:08:33,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-07 17:08:33,683 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-07 17:08:33,705 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-07 17:08:33,705 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:08:33,705 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:33,706 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-07 17:08:33,707 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:08:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2025-02-07 17:08:33,834 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:08:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2025-02-07 17:08:33,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572877771] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:08:33,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:08:33,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2025-02-07 17:08:33,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38331893] [2025-02-07 17:08:33,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:08:33,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-07 17:08:33,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:08:33,930 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-07 17:08:33,930 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2025-02-07 17:08:33,930 INFO L87 Difference]: Start difference. First operand 108 states and 125 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:34,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:08:34,054 INFO L93 Difference]: Finished difference Result 151 states and 175 transitions. [2025-02-07 17:08:34,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-07 17:08:34,055 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2025-02-07 17:08:34,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:08:34,056 INFO L225 Difference]: With dead ends: 151 [2025-02-07 17:08:34,056 INFO L226 Difference]: Without dead ends: 79 [2025-02-07 17:08:34,056 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 58 SyntacticMatches, 13 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2025-02-07 17:08:34,057 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:08:34,057 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:08:34,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-02-07 17:08:34,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2025-02-07 17:08:34,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 78 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:34,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2025-02-07 17:08:34,084 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 40 [2025-02-07 17:08:34,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:08:34,085 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2025-02-07 17:08:34,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:34,085 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2025-02-07 17:08:34,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-02-07 17:08:34,085 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:08:34,085 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:08:34,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-02-07 17:08:34,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:34,286 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:08:34,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:08:34,286 INFO L85 PathProgramCache]: Analyzing trace with hash -398338774, now seen corresponding path program 20 times [2025-02-07 17:08:34,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:08:34,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109416393] [2025-02-07 17:08:34,286 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:08:34,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:08:34,292 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 41 statements into 2 equivalence classes. [2025-02-07 17:08:34,298 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 41 of 41 statements. [2025-02-07 17:08:34,298 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:08:34,298 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-02-07 17:08:34,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:08:34,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109416393] [2025-02-07 17:08:34,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109416393] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:08:34,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78207733] [2025-02-07 17:08:34,486 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:08:34,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:34,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:08:34,489 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:08:34,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-07 17:08:34,554 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 41 statements into 2 equivalence classes. [2025-02-07 17:08:34,582 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 41 of 41 statements. [2025-02-07 17:08:34,583 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:08:34,583 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:34,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-07 17:08:34,585 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:08:34,718 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-02-07 17:08:34,718 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:08:34,852 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-02-07 17:08:34,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78207733] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:08:34,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:08:34,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2025-02-07 17:08:34,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615294513] [2025-02-07 17:08:34,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:08:34,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-07 17:08:34,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:08:34,854 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-07 17:08:34,854 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2025-02-07 17:08:34,854 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:34,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:08:34,979 INFO L93 Difference]: Finished difference Result 108 states and 126 transitions. [2025-02-07 17:08:34,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-07 17:08:34,980 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2025-02-07 17:08:34,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:08:34,980 INFO L225 Difference]: With dead ends: 108 [2025-02-07 17:08:34,980 INFO L226 Difference]: Without dead ends: 61 [2025-02-07 17:08:34,981 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 59 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2025-02-07 17:08:34,982 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 32 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:08:34,982 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 16 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:08:34,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-02-07 17:08:34,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 45. [2025-02-07 17:08:34,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 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 17:08:34,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2025-02-07 17:08:34,998 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 41 [2025-02-07 17:08:34,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:08:34,998 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2025-02-07 17:08:34,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:34,999 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2025-02-07 17:08:34,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-02-07 17:08:34,999 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:08:34,999 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:08:35,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-02-07 17:08:35,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:35,199 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:08:35,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:08:35,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1035672185, now seen corresponding path program 21 times [2025-02-07 17:08:35,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:08:35,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044299772] [2025-02-07 17:08:35,200 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:08:35,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:08:35,205 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 44 statements into 5 equivalence classes. [2025-02-07 17:08:35,250 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 44 of 44 statements. [2025-02-07 17:08:35,250 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-07 17:08:35,250 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:38,858 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 1 proven. 139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:08:38,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:08:38,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044299772] [2025-02-07 17:08:38,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044299772] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:08:38,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266921420] [2025-02-07 17:08:38,859 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:08:38,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:38,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:08:38,860 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:08:38,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-02-07 17:08:38,914 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 44 statements into 5 equivalence classes. [2025-02-07 17:08:38,955 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 44 of 44 statements. [2025-02-07 17:08:38,955 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-07 17:08:38,955 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:38,957 WARN L254 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 145 conjuncts are in the unsatisfiable core [2025-02-07 17:08:38,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:08:39,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:08:41,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:08:41,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:08:41,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:08:41,354 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:08:41,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 44 treesize of output 59 [2025-02-07 17:08:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:08:41,526 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:08:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 17:08:44,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266921420] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:08:44,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:08:44,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 36] total 110 [2025-02-07 17:08:44,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913369685] [2025-02-07 17:08:44,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:08:44,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2025-02-07 17:08:44,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:08:44,393 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2025-02-07 17:08:44,394 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=735, Invalid=11255, Unknown=0, NotChecked=0, Total=11990 [2025-02-07 17:08:44,394 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 110 states, 110 states have (on average 1.0636363636363637) internal successors, (117), 110 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:48,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:08:48,157 INFO L93 Difference]: Finished difference Result 106 states and 118 transitions. [2025-02-07 17:08:48,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2025-02-07 17:08:48,157 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.0636363636363637) internal successors, (117), 110 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2025-02-07 17:08:48,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:08:48,158 INFO L225 Difference]: With dead ends: 106 [2025-02-07 17:08:48,158 INFO L226 Difference]: Without dead ends: 103 [2025-02-07 17:08:48,160 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4011 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1140, Invalid=17220, Unknown=0, NotChecked=0, Total=18360 [2025-02-07 17:08:48,160 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 2911 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 3036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 2911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2025-02-07 17:08:48,160 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 3036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 2911 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2025-02-07 17:08:48,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2025-02-07 17:08:48,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 63. [2025-02-07 17:08:48,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 62 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 17:08:48,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2025-02-07 17:08:48,201 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 44 [2025-02-07 17:08:48,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:08:48,201 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2025-02-07 17:08:48,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.0636363636363637) internal successors, (117), 110 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:48,201 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2025-02-07 17:08:48,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-02-07 17:08:48,201 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:08:48,201 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:08:48,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-02-07 17:08:48,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-02-07 17:08:48,402 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:08:48,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:08:48,402 INFO L85 PathProgramCache]: Analyzing trace with hash 2041098410, now seen corresponding path program 22 times [2025-02-07 17:08:48,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:08:48,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915118018] [2025-02-07 17:08:48,402 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:08:48,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:08:48,410 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 45 statements into 2 equivalence classes. [2025-02-07 17:08:48,414 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 36 of 45 statements. [2025-02-07 17:08:48,414 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:08:48,414 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:48,604 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-02-07 17:08:48,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:08:48,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915118018] [2025-02-07 17:08:48,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915118018] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:08:48,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478440140] [2025-02-07 17:08:48,604 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:08:48,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:48,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:08:48,607 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:08:48,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-02-07 17:08:48,675 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 45 statements into 2 equivalence classes. [2025-02-07 17:08:48,694 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 36 of 45 statements. [2025-02-07 17:08:48,695 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:08:48,695 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:48,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-07 17:08:48,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:08:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-02-07 17:08:48,862 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:08:48,972 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-02-07 17:08:48,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478440140] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:08:48,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:08:48,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 27 [2025-02-07 17:08:48,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145694673] [2025-02-07 17:08:48,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:08:48,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-07 17:08:48,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:08:48,973 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-07 17:08:48,973 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2025-02-07 17:08:48,974 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:49,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:08:49,178 INFO L93 Difference]: Finished difference Result 112 states and 125 transitions. [2025-02-07 17:08:49,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-07 17:08:49,178 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 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 45 [2025-02-07 17:08:49,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:08:49,179 INFO L225 Difference]: With dead ends: 112 [2025-02-07 17:08:49,179 INFO L226 Difference]: Without dead ends: 68 [2025-02-07 17:08:49,179 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 66 SyntacticMatches, 16 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=879, Unknown=0, NotChecked=0, Total=1190 [2025-02-07 17:08:49,179 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:08:49,179 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 17 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:08:49,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-02-07 17:08:49,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2025-02-07 17:08:49,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 63 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 17:08:49,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2025-02-07 17:08:49,210 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 45 [2025-02-07 17:08:49,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:08:49,210 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2025-02-07 17:08:49,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:49,210 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2025-02-07 17:08:49,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-02-07 17:08:49,210 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:08:49,210 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:08:49,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-02-07 17:08:49,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-02-07 17:08:49,411 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:08:49,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:08:49,411 INFO L85 PathProgramCache]: Analyzing trace with hash -173188854, now seen corresponding path program 23 times [2025-02-07 17:08:49,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:08:49,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944012138] [2025-02-07 17:08:49,411 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:08:49,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:08:49,418 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 45 statements into 5 equivalence classes. [2025-02-07 17:08:49,432 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 45 of 45 statements. [2025-02-07 17:08:49,433 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-07 17:08:49,433 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:49,658 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-02-07 17:08:49,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:08:49,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944012138] [2025-02-07 17:08:49,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944012138] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:08:49,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16061004] [2025-02-07 17:08:49,659 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:08:49,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:49,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:08:49,661 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:08:49,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-02-07 17:08:49,729 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 45 statements into 5 equivalence classes. [2025-02-07 17:08:49,945 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 45 of 45 statements. [2025-02-07 17:08:49,945 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-07 17:08:49,945 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:49,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-07 17:08:49,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:08:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-02-07 17:08:50,090 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:08:50,215 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-02-07 17:08:50,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16061004] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:08:50,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:08:50,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 27 [2025-02-07 17:08:50,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341621940] [2025-02-07 17:08:50,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:08:50,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-07 17:08:50,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:08:50,216 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-07 17:08:50,216 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2025-02-07 17:08:50,217 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:50,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:08:50,378 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2025-02-07 17:08:50,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-07 17:08:50,379 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 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 45 [2025-02-07 17:08:50,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:08:50,379 INFO L225 Difference]: With dead ends: 68 [2025-02-07 17:08:50,379 INFO L226 Difference]: Without dead ends: 49 [2025-02-07 17:08:50,379 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 65 SyntacticMatches, 17 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=937, Unknown=0, NotChecked=0, Total=1260 [2025-02-07 17:08:50,380 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:08:50,380 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 18 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:08:50,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2025-02-07 17:08:50,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2025-02-07 17:08:50,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:50,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2025-02-07 17:08:50,405 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 45 [2025-02-07 17:08:50,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:08:50,405 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2025-02-07 17:08:50,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:50,406 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2025-02-07 17:08:50,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-02-07 17:08:50,406 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:08:50,406 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:08:50,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-02-07 17:08:50,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-02-07 17:08:50,608 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:08:50,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:08:50,608 INFO L85 PathProgramCache]: Analyzing trace with hash 323077753, now seen corresponding path program 24 times [2025-02-07 17:08:50,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:08:50,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003387490] [2025-02-07 17:08:50,608 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:08:50,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:08:50,614 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 48 statements into 5 equivalence classes. [2025-02-07 17:08:50,633 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 48 of 48 statements. [2025-02-07 17:08:50,633 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-07 17:08:50,633 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:50,851 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2025-02-07 17:08:50,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:08:50,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003387490] [2025-02-07 17:08:50,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003387490] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:08:50,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81374387] [2025-02-07 17:08:50,851 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:08:50,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:50,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:08:50,853 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:08:50,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-02-07 17:08:50,924 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 48 statements into 5 equivalence classes. [2025-02-07 17:08:50,967 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 48 of 48 statements. [2025-02-07 17:08:50,968 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-07 17:08:50,968 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:50,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-07 17:08:50,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:08:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2025-02-07 17:08:51,153 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:08:51,295 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2025-02-07 17:08:51,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81374387] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:08:51,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:08:51,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2025-02-07 17:08:51,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723927766] [2025-02-07 17:08:51,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:08:51,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-07 17:08:51,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:08:51,296 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-07 17:08:51,296 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2025-02-07 17:08:51,296 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:51,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:08:51,397 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2025-02-07 17:08:51,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-07 17:08:51,398 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2025-02-07 17:08:51,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:08:51,398 INFO L225 Difference]: With dead ends: 89 [2025-02-07 17:08:51,398 INFO L226 Difference]: Without dead ends: 50 [2025-02-07 17:08:51,399 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 71 SyntacticMatches, 15 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2025-02-07 17:08:51,399 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:08:51,399 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:08:51,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2025-02-07 17:08:51,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2025-02-07 17:08:51,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:51,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2025-02-07 17:08:51,426 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 48 [2025-02-07 17:08:51,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:08:51,426 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2025-02-07 17:08:51,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:08:51,426 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2025-02-07 17:08:51,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-02-07 17:08:51,426 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:08:51,426 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:08:51,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2025-02-07 17:08:51,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-02-07 17:08:51,627 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:08:51,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:08:51,627 INFO L85 PathProgramCache]: Analyzing trace with hash 335494314, now seen corresponding path program 25 times [2025-02-07 17:08:51,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:08:51,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131237577] [2025-02-07 17:08:51,628 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:08:51,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:08:51,636 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-02-07 17:08:51,683 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-02-07 17:08:51,684 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:08:51,684 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:55,405 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 1 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:08:55,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:08:55,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131237577] [2025-02-07 17:08:55,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131237577] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:08:55,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070069969] [2025-02-07 17:08:55,406 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:08:55,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:08:55,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:08:55,408 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:08:55,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-02-07 17:08:55,480 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-02-07 17:08:55,513 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-02-07 17:08:55,513 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:08:55,513 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:08:55,515 WARN L254 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 156 conjuncts are in the unsatisfiable core [2025-02-07 17:08:55,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:08:55,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:08:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:08:56,849 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:09:00,156 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 17:09:00,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070069969] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:09:00,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:09:00,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 46, 38] total 104 [2025-02-07 17:09:00,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912058235] [2025-02-07 17:09:00,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:09:00,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2025-02-07 17:09:00,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:09:00,158 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2025-02-07 17:09:00,159 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=10352, Unknown=0, NotChecked=0, Total=10712 [2025-02-07 17:09:00,159 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 104 states, 104 states have (on average 1.1057692307692308) internal successors, (115), 104 states have internal predecessors, (115), 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 17:09:03,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:09:03,601 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2025-02-07 17:09:03,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-02-07 17:09:03,601 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.1057692307692308) internal successors, (115), 104 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2025-02-07 17:09:03,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:09:03,602 INFO L225 Difference]: With dead ends: 81 [2025-02-07 17:09:03,602 INFO L226 Difference]: Without dead ends: 78 [2025-02-07 17:09:03,603 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3296 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=693, Invalid=16077, Unknown=0, NotChecked=0, Total=16770 [2025-02-07 17:09:03,603 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 3503 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 3577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 3503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2025-02-07 17:09:03,603 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 157 Invalid, 3577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 3503 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2025-02-07 17:09:03,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2025-02-07 17:09:03,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2025-02-07 17:09:03,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 69 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:09:03,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2025-02-07 17:09:03,632 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 49 [2025-02-07 17:09:03,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:09:03,632 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2025-02-07 17:09:03,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.1057692307692308) internal successors, (115), 104 states have internal predecessors, (115), 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 17:09:03,632 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2025-02-07 17:09:03,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-02-07 17:09:03,633 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:09:03,633 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:09:03,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2025-02-07 17:09:03,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-02-07 17:09:03,833 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:09:03,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:09:03,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1810420889, now seen corresponding path program 26 times [2025-02-07 17:09:03,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:09:03,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642455347] [2025-02-07 17:09:03,834 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:09:03,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:09:03,841 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-02-07 17:09:03,848 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-02-07 17:09:03,848 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:09:03,848 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:09:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2025-02-07 17:09:04,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:09:04,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642455347] [2025-02-07 17:09:04,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642455347] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:09:04,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841524098] [2025-02-07 17:09:04,103 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:09:04,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:09:04,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:09:04,106 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:09:04,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-02-07 17:09:04,185 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-02-07 17:09:04,220 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-02-07 17:09:04,221 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:09:04,221 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:09:04,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-07 17:09:04,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:09:04,441 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2025-02-07 17:09:04,442 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:09:04,584 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2025-02-07 17:09:04,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841524098] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:09:04,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:09:04,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2025-02-07 17:09:04,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953399733] [2025-02-07 17:09:04,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:09:04,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-07 17:09:04,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:09:04,585 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-07 17:09:04,585 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2025-02-07 17:09:04,585 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 32 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:09:04,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:09:04,767 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2025-02-07 17:09:04,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-07 17:09:04,767 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2025-02-07 17:09:04,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:09:04,768 INFO L225 Difference]: With dead ends: 138 [2025-02-07 17:09:04,768 INFO L226 Difference]: Without dead ends: 71 [2025-02-07 17:09:04,768 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 72 SyntacticMatches, 17 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2025-02-07 17:09:04,769 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:09:04,769 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:09:04,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2025-02-07 17:09:04,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2025-02-07 17:09:04,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 70 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:09:04,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2025-02-07 17:09:04,802 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 50 [2025-02-07 17:09:04,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:09:04,802 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2025-02-07 17:09:04,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:09:04,802 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2025-02-07 17:09:04,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-02-07 17:09:04,803 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:09:04,803 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:09:04,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-02-07 17:09:05,003 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-02-07 17:09:05,003 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:09:05,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:09:05,004 INFO L85 PathProgramCache]: Analyzing trace with hash 857834122, now seen corresponding path program 27 times [2025-02-07 17:09:05,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:09:05,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431042180] [2025-02-07 17:09:05,004 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:09:05,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:09:05,012 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 51 statements into 6 equivalence classes. [2025-02-07 17:09:05,066 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 51 of 51 statements. [2025-02-07 17:09:05,066 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-07 17:09:05,066 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:09:05,331 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2025-02-07 17:09:05,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:09:05,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431042180] [2025-02-07 17:09:05,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431042180] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:09:05,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898039738] [2025-02-07 17:09:05,332 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:09:05,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:09:05,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:09:05,334 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:09:05,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-02-07 17:09:05,408 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 51 statements into 6 equivalence classes. [2025-02-07 17:09:05,541 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 51 of 51 statements. [2025-02-07 17:09:05,541 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-07 17:09:05,541 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:09:05,543 INFO L256 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-07 17:09:05,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:09:05,707 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2025-02-07 17:09:05,707 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:09:05,861 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2025-02-07 17:09:05,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898039738] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:09:05,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:09:05,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2025-02-07 17:09:05,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000013132] [2025-02-07 17:09:05,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:09:05,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-07 17:09:05,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:09:05,862 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-07 17:09:05,862 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2025-02-07 17:09:05,863 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 32 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:09:05,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:09:05,987 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2025-02-07 17:09:05,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-07 17:09:05,987 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2025-02-07 17:09:05,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:09:05,987 INFO L225 Difference]: With dead ends: 96 [2025-02-07 17:09:05,987 INFO L226 Difference]: Without dead ends: 55 [2025-02-07 17:09:05,988 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 73 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=801, Unknown=0, NotChecked=0, Total=1056 [2025-02-07 17:09:05,988 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 7 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:09:05,988 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 12 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:09:05,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2025-02-07 17:09:06,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2025-02-07 17:09:06,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 54 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:09:06,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2025-02-07 17:09:06,013 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 51 [2025-02-07 17:09:06,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:09:06,013 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2025-02-07 17:09:06,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:09:06,013 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2025-02-07 17:09:06,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-02-07 17:09:06,013 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:09:06,013 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:09:06,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-02-07 17:09:06,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-02-07 17:09:06,214 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:09:06,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:09:06,214 INFO L85 PathProgramCache]: Analyzing trace with hash -212152039, now seen corresponding path program 28 times [2025-02-07 17:09:06,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:09:06,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278664201] [2025-02-07 17:09:06,214 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:09:06,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:09:06,221 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 54 statements into 2 equivalence classes. [2025-02-07 17:09:06,235 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 54 of 54 statements. [2025-02-07 17:09:06,235 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:09:06,235 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat