./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/diamond_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-acceleration/diamond_1-2.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 278330930f6296a6ef523f9a21bb3281878247b5e50b78eb9077d2b7690716c4 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 14:46:21,081 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 14:46:21,128 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 14:46:21,132 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 14:46:21,132 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 14:46:21,153 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 14:46:21,154 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 14:46:21,155 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 14:46:21,155 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 14:46:21,155 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 14:46:21,156 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 14:46:21,156 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 14:46:21,156 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 14:46:21,156 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 14:46:21,156 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 14:46:21,157 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 14:46:21,157 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 14:46:21,157 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 14:46:21,157 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 14:46:21,157 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 14:46:21,157 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 14:46:21,157 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 14:46:21,157 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 14:46:21,157 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 14:46:21,157 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 14:46:21,157 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 14:46:21,158 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 14:46:21,158 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 14:46:21,158 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 14:46:21,158 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 14:46:21,158 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 14:46:21,158 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 14:46:21,158 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 14:46:21,158 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 14:46:21,159 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 14:46:21,159 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 14:46:21,159 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 14:46:21,159 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 14:46:21,159 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 14:46:21,159 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 14:46:21,159 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 14:46:21,159 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 14:46:21,159 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 14:46:21,159 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 -> 278330930f6296a6ef523f9a21bb3281878247b5e50b78eb9077d2b7690716c4 [2025-02-05 14:46:21,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 14:46:21,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 14:46:21,394 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 14:46:21,395 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 14:46:21,395 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 14:46:21,396 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/diamond_1-2.c [2025-02-05 14:46:22,473 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/76ff86dd2/c0e39decc3044e8fbc0b6632ded8ae00/FLAG04d375d37 [2025-02-05 14:46:22,703 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 14:46:22,705 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/loop-acceleration/diamond_1-2.c [2025-02-05 14:46:22,724 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/76ff86dd2/c0e39decc3044e8fbc0b6632ded8ae00/FLAG04d375d37 [2025-02-05 14:46:23,059 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/76ff86dd2/c0e39decc3044e8fbc0b6632ded8ae00 [2025-02-05 14:46:23,061 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 14:46:23,062 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 14:46:23,062 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 14:46:23,063 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 14:46:23,065 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 14:46:23,066 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 02:46:23" (1/1) ... [2025-02-05 14:46:23,066 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bb8550 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:46:23, skipping insertion in model container [2025-02-05 14:46:23,066 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 02:46:23" (1/1) ... [2025-02-05 14:46:23,074 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 14:46:23,173 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/loop-acceleration/diamond_1-2.c[373,386] [2025-02-05 14:46:23,181 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 14:46:23,187 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 14:46:23,194 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/loop-acceleration/diamond_1-2.c[373,386] [2025-02-05 14:46:23,196 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 14:46:23,205 INFO L204 MainTranslator]: Completed translation [2025-02-05 14:46:23,206 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:46:23 WrapperNode [2025-02-05 14:46:23,206 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 14:46:23,207 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 14:46:23,207 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 14:46:23,208 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 14:46:23,211 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:46:23" (1/1) ... [2025-02-05 14:46:23,214 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:46:23" (1/1) ... [2025-02-05 14:46:23,223 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 26 [2025-02-05 14:46:23,224 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 14:46:23,224 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 14:46:23,225 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 14:46:23,225 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 14:46:23,229 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:46:23" (1/1) ... [2025-02-05 14:46:23,229 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:46:23" (1/1) ... [2025-02-05 14:46:23,230 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:46:23" (1/1) ... [2025-02-05 14:46:23,235 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-05 14:46:23,235 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:46:23" (1/1) ... [2025-02-05 14:46:23,235 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:46:23" (1/1) ... [2025-02-05 14:46:23,239 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:46:23" (1/1) ... [2025-02-05 14:46:23,241 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:46:23" (1/1) ... [2025-02-05 14:46:23,241 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:46:23" (1/1) ... [2025-02-05 14:46:23,242 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:46:23" (1/1) ... [2025-02-05 14:46:23,242 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 14:46:23,242 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 14:46:23,242 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 14:46:23,243 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 14:46:23,243 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:46:23" (1/1) ... [2025-02-05 14:46:23,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 14:46:23,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:46:23,273 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-05 14:46:23,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-05 14:46:23,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 14:46:23,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 14:46:23,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 14:46:23,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 14:46:23,332 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 14:46:23,334 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 14:46:23,396 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-02-05 14:46:23,396 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 14:46:23,402 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 14:46:23,408 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 14:46:23,408 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 02:46:23 BoogieIcfgContainer [2025-02-05 14:46:23,408 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 14:46:23,410 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 14:46:23,410 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 14:46:23,416 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 14:46:23,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 02:46:23" (1/3) ... [2025-02-05 14:46:23,417 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ea88c1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 02:46:23, skipping insertion in model container [2025-02-05 14:46:23,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:46:23" (2/3) ... [2025-02-05 14:46:23,418 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ea88c1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 02:46:23, skipping insertion in model container [2025-02-05 14:46:23,418 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 02:46:23" (3/3) ... [2025-02-05 14:46:23,419 INFO L128 eAbstractionObserver]: Analyzing ICFG diamond_1-2.c [2025-02-05 14:46:23,433 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 14:46:23,435 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG diamond_1-2.c that has 1 procedures, 11 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-02-05 14:46:23,472 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 14:46:23,482 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;@58e69979, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 14:46:23,483 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 14:46:23,485 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:46:23,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2025-02-05 14:46:23,489 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:46:23,489 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2025-02-05 14:46:23,489 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:46:23,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:46:23,493 INFO L85 PathProgramCache]: Analyzing trace with hash 40045990, now seen corresponding path program 1 times [2025-02-05 14:46:23,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:46:23,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553555776] [2025-02-05 14:46:23,498 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:46:23,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:46:23,539 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-05 14:46:23,558 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-05 14:46:23,558 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:46:23,558 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:46:23,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:46:23,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:46:23,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553555776] [2025-02-05 14:46:23,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553555776] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:46:23,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 14:46:23,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-05 14:46:23,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391989721] [2025-02-05 14:46:23,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:46:23,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-05 14:46:23,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:46:23,673 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-05 14:46:23,673 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 14:46:23,674 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:46:23,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:46:23,697 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2025-02-05 14:46:23,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 14:46:23,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2025-02-05 14:46:23,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:46:23,705 INFO L225 Difference]: With dead ends: 20 [2025-02-05 14:46:23,705 INFO L226 Difference]: Without dead ends: 9 [2025-02-05 14:46:23,707 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 [2025-02-05 14:46:23,709 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:46:23,711 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 15 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:46:23,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2025-02-05 14:46:23,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2025-02-05 14:46:23,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 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) [2025-02-05 14:46:23,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2025-02-05 14:46:23,730 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2025-02-05 14:46:23,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:46:23,730 INFO L471 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2025-02-05 14:46:23,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:46:23,730 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2025-02-05 14:46:23,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-02-05 14:46:23,730 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:46:23,731 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:46:23,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 14:46:23,732 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:46:23,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:46:23,732 INFO L85 PathProgramCache]: Analyzing trace with hash -167646296, now seen corresponding path program 1 times [2025-02-05 14:46:23,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:46:23,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637905712] [2025-02-05 14:46:23,733 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:46:23,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:46:23,740 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-05 14:46:23,748 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-05 14:46:23,750 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:46:23,750 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:46:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:46:23,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:46:23,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637905712] [2025-02-05 14:46:23,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637905712] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:46:23,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689832235] [2025-02-05 14:46:23,831 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:46:23,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:46:23,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:46:23,834 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:46:23,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-05 14:46:23,859 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-05 14:46:23,865 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-05 14:46:23,866 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:46:23,866 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:46:23,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-05 14:46:23,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:46:23,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:46:23,894 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:46:23,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:46:23,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689832235] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:46:23,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:46:23,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-02-05 14:46:23,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767676468] [2025-02-05 14:46:23,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:46:23,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 14:46:23,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:46:23,933 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 14:46:23,933 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2025-02-05 14:46:23,933 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:46:23,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:46:23,985 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2025-02-05 14:46:23,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 14:46:23,985 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-02-05 14:46:23,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:46:23,985 INFO L225 Difference]: With dead ends: 17 [2025-02-05 14:46:23,985 INFO L226 Difference]: Without dead ends: 14 [2025-02-05 14:46:23,986 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2025-02-05 14:46:23,986 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:46:23,986 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 11 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:46:23,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2025-02-05 14:46:23,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2025-02-05 14:46:23,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:46:23,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2025-02-05 14:46:23,989 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 7 [2025-02-05 14:46:23,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:46:23,989 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2025-02-05 14:46:23,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:46:23,989 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2025-02-05 14:46:23,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-05 14:46:23,989 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:46:23,990 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2025-02-05 14:46:23,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-05 14:46:24,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:46:24,190 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:46:24,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:46:24,191 INFO L85 PathProgramCache]: Analyzing trace with hash 2132188712, now seen corresponding path program 1 times [2025-02-05 14:46:24,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:46:24,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203686182] [2025-02-05 14:46:24,191 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:46:24,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:46:24,199 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-05 14:46:24,210 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-05 14:46:24,210 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:46:24,210 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:46:24,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:46:24,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:46:24,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203686182] [2025-02-05 14:46:24,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203686182] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:46:24,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015027178] [2025-02-05 14:46:24,296 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:46:24,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:46:24,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:46:24,298 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:46:24,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-05 14:46:24,319 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-05 14:46:24,326 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-05 14:46:24,326 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:46:24,326 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:46:24,327 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-05 14:46:24,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:46:24,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:46:24,344 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:46:24,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:46:24,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015027178] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:46:24,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:46:24,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2025-02-05 14:46:24,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781141328] [2025-02-05 14:46:24,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:46:24,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-05 14:46:24,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:46:24,404 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-05 14:46:24,404 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2025-02-05 14:46:24,404 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:46:24,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:46:24,512 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2025-02-05 14:46:24,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 14:46:24,512 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 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 [2025-02-05 14:46:24,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:46:24,512 INFO L225 Difference]: With dead ends: 28 [2025-02-05 14:46:24,513 INFO L226 Difference]: Without dead ends: 25 [2025-02-05 14:46:24,513 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2025-02-05 14:46:24,513 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:46:24,514 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 23 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:46:24,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-02-05 14:46:24,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2025-02-05 14:46:24,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2025-02-05 14:46:24,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2025-02-05 14:46:24,518 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 9 [2025-02-05 14:46:24,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:46:24,518 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2025-02-05 14:46:24,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:46:24,518 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2025-02-05 14:46:24,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-02-05 14:46:24,519 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:46:24,519 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2025-02-05 14:46:24,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-05 14:46:24,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:46:24,719 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:46:24,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:46:24,720 INFO L85 PathProgramCache]: Analyzing trace with hash -147591504, now seen corresponding path program 2 times [2025-02-05 14:46:24,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:46:24,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81068409] [2025-02-05 14:46:24,720 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:46:24,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:46:24,726 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-02-05 14:46:24,739 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-02-05 14:46:24,739 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:46:24,739 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:46:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:46:24,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:46:24,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81068409] [2025-02-05 14:46:24,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81068409] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:46:24,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924566765] [2025-02-05 14:46:24,900 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:46:24,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:46:24,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:46:24,903 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:46:24,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-05 14:46:24,934 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-02-05 14:46:24,942 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-02-05 14:46:24,942 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:46:24,943 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:46:24,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-05 14:46:24,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:46:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:46:24,969 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:46:25,075 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:46:25,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924566765] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:46:25,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:46:25,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2025-02-05 14:46:25,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054316576] [2025-02-05 14:46:25,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:46:25,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-05 14:46:25,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:46:25,077 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-05 14:46:25,078 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2025-02-05 14:46:25,078 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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) [2025-02-05 14:46:25,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:46:25,358 INFO L93 Difference]: Finished difference Result 63 states and 93 transitions. [2025-02-05 14:46:25,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-05 14:46:25,359 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-02-05 14:46:25,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:46:25,359 INFO L225 Difference]: With dead ends: 63 [2025-02-05 14:46:25,359 INFO L226 Difference]: Without dead ends: 60 [2025-02-05 14:46:25,360 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2025-02-05 14:46:25,360 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:46:25,360 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 23 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:46:25,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-02-05 14:46:25,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 30. [2025-02-05 14:46:25,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 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) [2025-02-05 14:46:25,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 42 transitions. [2025-02-05 14:46:25,367 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 42 transitions. Word has length 15 [2025-02-05 14:46:25,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:46:25,367 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 42 transitions. [2025-02-05 14:46:25,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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) [2025-02-05 14:46:25,367 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 42 transitions. [2025-02-05 14:46:25,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-02-05 14:46:25,371 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:46:25,372 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2025-02-05 14:46:25,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-05 14:46:25,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:46:25,572 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:46:25,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:46:25,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1099828268, now seen corresponding path program 2 times [2025-02-05 14:46:25,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:46:25,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146890390] [2025-02-05 14:46:25,573 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:46:25,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:46:25,577 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-02-05 14:46:25,588 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-02-05 14:46:25,589 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:46:25,589 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:46:25,705 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:46:25,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:46:25,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146890390] [2025-02-05 14:46:25,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146890390] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:46:25,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638842993] [2025-02-05 14:46:25,706 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:46:25,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:46:25,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:46:25,710 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:46:25,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-05 14:46:25,729 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-02-05 14:46:25,736 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-02-05 14:46:25,736 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:46:25,736 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:46:25,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-05 14:46:25,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:46:25,765 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:46:25,765 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:46:25,878 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:46:25,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638842993] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:46:25,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:46:25,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2025-02-05 14:46:25,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509188600] [2025-02-05 14:46:25,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:46:25,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-05 14:46:25,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:46:25,880 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-05 14:46:25,880 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2025-02-05 14:46:25,880 INFO L87 Difference]: Start difference. First operand 30 states and 42 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:46:26,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:46:26,372 INFO L93 Difference]: Finished difference Result 141 states and 209 transitions. [2025-02-05 14:46:26,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-05 14:46:26,373 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2025-02-05 14:46:26,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:46:26,374 INFO L225 Difference]: With dead ends: 141 [2025-02-05 14:46:26,374 INFO L226 Difference]: Without dead ends: 138 [2025-02-05 14:46:26,374 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2025-02-05 14:46:26,375 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 14:46:26,375 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 26 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 14:46:26,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2025-02-05 14:46:26,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 74. [2025-02-05 14:46:26,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.4794520547945205) internal successors, (108), 73 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:46:26,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 108 transitions. [2025-02-05 14:46:26,389 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 108 transitions. Word has length 17 [2025-02-05 14:46:26,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:46:26,389 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 108 transitions. [2025-02-05 14:46:26,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:46:26,389 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 108 transitions. [2025-02-05 14:46:26,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-02-05 14:46:26,390 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:46:26,390 INFO L218 NwaCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1, 1, 1] [2025-02-05 14:46:26,397 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 [2025-02-05 14:46:26,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:46:26,594 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:46:26,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:46:26,595 INFO L85 PathProgramCache]: Analyzing trace with hash 2137842581, now seen corresponding path program 1 times [2025-02-05 14:46:26,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:46:26,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498762327] [2025-02-05 14:46:26,595 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:46:26,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:46:26,602 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-05 14:46:26,607 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-05 14:46:26,607 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:46:26,607 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:46:26,633 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-02-05 14:46:26,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:46:26,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498762327] [2025-02-05 14:46:26,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498762327] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:46:26,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 14:46:26,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-05 14:46:26,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797231671] [2025-02-05 14:46:26,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:46:26,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-05 14:46:26,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:46:26,634 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-05 14:46:26,634 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 14:46:26,634 INFO L87 Difference]: Start difference. First operand 74 states and 108 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:46:26,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:46:26,674 INFO L93 Difference]: Finished difference Result 127 states and 186 transitions. [2025-02-05 14:46:26,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 14:46:26,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2025-02-05 14:46:26,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:46:26,675 INFO L225 Difference]: With dead ends: 127 [2025-02-05 14:46:26,675 INFO L226 Difference]: Without dead ends: 83 [2025-02-05 14:46:26,675 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 [2025-02-05 14:46:26,675 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:46:26,675 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:46:26,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-02-05 14:46:26,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2025-02-05 14:46:26,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 56 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:46:26,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 72 transitions. [2025-02-05 14:46:26,689 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 72 transitions. Word has length 23 [2025-02-05 14:46:26,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:46:26,690 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 72 transitions. [2025-02-05 14:46:26,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:46:26,690 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 72 transitions. [2025-02-05 14:46:26,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-02-05 14:46:26,690 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:46:26,691 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1] [2025-02-05 14:46:26,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-05 14:46:26,691 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:46:26,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:46:26,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1396317413, now seen corresponding path program 2 times [2025-02-05 14:46:26,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:46:26,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676021849] [2025-02-05 14:46:26,691 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:46:26,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:46:26,695 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-02-05 14:46:26,699 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-05 14:46:26,699 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:46:26,699 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:46:26,713 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2025-02-05 14:46:26,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:46:26,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676021849] [2025-02-05 14:46:26,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676021849] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:46:26,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 14:46:26,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-05 14:46:26,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439847107] [2025-02-05 14:46:26,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:46:26,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-05 14:46:26,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:46:26,714 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-05 14:46:26,714 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 14:46:26,714 INFO L87 Difference]: Start difference. First operand 57 states and 72 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:46:26,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:46:26,729 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2025-02-05 14:46:26,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 14:46:26,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2025-02-05 14:46:26,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:46:26,729 INFO L225 Difference]: With dead ends: 79 [2025-02-05 14:46:26,729 INFO L226 Difference]: Without dead ends: 57 [2025-02-05 14:46:26,730 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 [2025-02-05 14:46:26,730 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:46:26,730 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:46:26,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2025-02-05 14:46:26,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2025-02-05 14:46:26,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 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) [2025-02-05 14:46:26,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2025-02-05 14:46:26,741 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 27 [2025-02-05 14:46:26,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:46:26,741 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2025-02-05 14:46:26,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:46:26,742 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2025-02-05 14:46:26,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-02-05 14:46:26,742 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:46:26,742 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1] [2025-02-05 14:46:26,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-05 14:46:26,742 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:46:26,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:46:26,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1859394370, now seen corresponding path program 3 times [2025-02-05 14:46:26,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:46:26,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336470566] [2025-02-05 14:46:26,743 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:46:26,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:46:26,747 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 13 equivalence classes. [2025-02-05 14:46:26,756 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) and asserted 29 of 29 statements. [2025-02-05 14:46:26,757 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2025-02-05 14:46:26,757 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:46:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:46:26,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:46:26,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336470566] [2025-02-05 14:46:26,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336470566] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:46:26,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820596019] [2025-02-05 14:46:26,917 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:46:26,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:46:26,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:46:26,924 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:46:26,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-05 14:46:26,946 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 13 equivalence classes. [2025-02-05 14:46:26,966 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) and asserted 29 of 29 statements. [2025-02-05 14:46:26,966 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2025-02-05 14:46:26,966 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:46:26,967 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-05 14:46:26,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:46:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:46:27,019 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:46:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:46:27,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820596019] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:46:27,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:46:27,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2025-02-05 14:46:27,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795093214] [2025-02-05 14:46:27,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:46:27,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-05 14:46:27,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:46:27,362 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-05 14:46:27,363 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2025-02-05 14:46:27,363 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:46:30,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:46:30,564 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2025-02-05 14:46:30,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-02-05 14:46:30,564 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 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 [2025-02-05 14:46:30,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:46:30,565 INFO L225 Difference]: With dead ends: 88 [2025-02-05 14:46:30,565 INFO L226 Difference]: Without dead ends: 85 [2025-02-05 14:46:30,566 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=598, Invalid=1042, Unknown=0, NotChecked=0, Total=1640 [2025-02-05 14:46:30,566 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 14:46:30,566 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 44 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 14:46:30,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2025-02-05 14:46:30,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2025-02-05 14:46:30,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:46:30,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2025-02-05 14:46:30,575 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 29 [2025-02-05 14:46:30,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:46:30,575 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2025-02-05 14:46:30,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:46:30,575 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2025-02-05 14:46:30,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-02-05 14:46:30,576 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:46:30,576 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1] [2025-02-05 14:46:30,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-05 14:46:30,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:46:30,776 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:46:30,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:46:30,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1974723532, now seen corresponding path program 3 times [2025-02-05 14:46:30,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:46:30,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635789597] [2025-02-05 14:46:30,777 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:46:30,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:46:30,781 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 33 statements into 15 equivalence classes. [2025-02-05 14:46:30,799 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) and asserted 33 of 33 statements. [2025-02-05 14:46:30,799 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2025-02-05 14:46:30,799 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:46:31,008 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:46:31,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:46:31,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635789597] [2025-02-05 14:46:31,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635789597] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:46:31,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224503984] [2025-02-05 14:46:31,008 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:46:31,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:46:31,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:46:31,016 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:46:31,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-05 14:46:31,039 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 33 statements into 15 equivalence classes. [2025-02-05 14:46:31,057 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) and asserted 33 of 33 statements. [2025-02-05 14:46:31,057 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2025-02-05 14:46:31,057 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:46:31,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-02-05 14:46:31,059 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:46:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:46:31,106 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:46:31,466 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:46:31,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224503984] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:46:31,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:46:31,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2025-02-05 14:46:31,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214354023] [2025-02-05 14:46:31,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:46:31,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-02-05 14:46:31,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:46:31,467 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-02-05 14:46:31,468 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2025-02-05 14:46:31,468 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:46:41,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:46:41,607 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2025-02-05 14:46:41,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-02-05 14:46:41,608 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2025-02-05 14:46:41,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:46:41,608 INFO L225 Difference]: With dead ends: 120 [2025-02-05 14:46:41,608 INFO L226 Difference]: Without dead ends: 117 [2025-02-05 14:46:41,609 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=780, Invalid=1382, Unknown=0, NotChecked=0, Total=2162 [2025-02-05 14:46:41,609 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-05 14:46:41,609 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 50 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-05 14:46:41,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2025-02-05 14:46:41,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2025-02-05 14:46:41,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 116 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:46:41,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2025-02-05 14:46:41,621 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 33 [2025-02-05 14:46:41,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:46:41,621 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2025-02-05 14:46:41,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:46:41,621 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2025-02-05 14:46:41,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-02-05 14:46:41,622 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:46:41,622 INFO L218 NwaCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1] [2025-02-05 14:46:41,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-05 14:46:41,823 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,SelfDestructingSolverStorable8 [2025-02-05 14:46:41,823 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:46:41,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:46:41,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1248239450, now seen corresponding path program 4 times [2025-02-05 14:46:41,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:46:41,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659611928] [2025-02-05 14:46:41,824 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:46:41,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:46:41,829 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 57 statements into 2 equivalence classes. [2025-02-05 14:46:41,836 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 57 of 57 statements. [2025-02-05 14:46:41,836 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:46:41,836 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:46:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:46:42,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:46:42,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659611928] [2025-02-05 14:46:42,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659611928] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:46:42,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029518349] [2025-02-05 14:46:42,454 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:46:42,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:46:42,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:46:42,457 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:46:42,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-05 14:46:42,480 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 57 statements into 2 equivalence classes. [2025-02-05 14:46:42,507 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 57 of 57 statements. [2025-02-05 14:46:42,507 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:46:42,507 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:46:42,508 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-02-05 14:46:42,509 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:46:42,589 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:46:42,589 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:46:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:46:43,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029518349] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:46:43,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:46:43,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2025-02-05 14:46:43,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147172489] [2025-02-05 14:46:43,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:46:43,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-02-05 14:46:43,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:46:43,587 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-02-05 14:46:43,588 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=894, Invalid=2298, Unknown=0, NotChecked=0, Total=3192 [2025-02-05 14:46:43,588 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)