./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound10.i --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/nla-digbench-scaling/divbin_valuebound10.i -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 7cd88f875a58f4eeda0acf74fa673f6c9452a00f17e8b4a3e93b35765440e39d --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 15:06:53,279 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 15:06:53,345 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 15:06:53,348 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 15:06:53,351 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 15:06:53,380 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 15:06:53,381 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 15:06:53,381 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 15:06:53,381 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 15:06:53,382 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 15:06:53,382 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 15:06:53,382 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 15:06:53,383 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 15:06:53,383 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 15:06:53,383 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 15:06:53,383 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 15:06:53,383 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 15:06:53,383 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 15:06:53,384 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 15:06:53,384 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 15:06:53,384 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 15:06:53,384 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 15:06:53,384 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 15:06:53,384 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 15:06:53,384 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 15:06:53,384 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 15:06:53,384 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 15:06:53,385 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 15:06:53,385 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 15:06:53,385 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 15:06:53,385 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 15:06:53,385 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 15:06:53,385 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:06:53,386 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 15:06:53,386 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 15:06:53,386 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 15:06:53,386 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 15:06:53,386 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 15:06:53,386 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 15:06:53,386 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 15:06:53,386 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 15:06:53,386 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 15:06:53,387 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 15:06:53,387 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 -> 7cd88f875a58f4eeda0acf74fa673f6c9452a00f17e8b4a3e93b35765440e39d [2025-02-05 15:06:53,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 15:06:53,646 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 15:06:53,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 15:06:53,648 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 15:06:53,649 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 15:06:53,651 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound10.i [2025-02-05 15:06:54,830 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/dfa339a78/74145ea63e224eb196b206d06252b207/FLAG791274416 [2025-02-05 15:06:55,092 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 15:06:55,092 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound10.i [2025-02-05 15:06:55,099 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/dfa339a78/74145ea63e224eb196b206d06252b207/FLAG791274416 [2025-02-05 15:06:55,112 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/dfa339a78/74145ea63e224eb196b206d06252b207 [2025-02-05 15:06:55,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 15:06:55,115 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 15:06:55,116 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 15:06:55,116 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 15:06:55,120 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 15:06:55,120 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:06:55" (1/1) ... [2025-02-05 15:06:55,121 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bcac649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:55, skipping insertion in model container [2025-02-05 15:06:55,121 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:06:55" (1/1) ... [2025-02-05 15:06:55,133 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 15:06:55,267 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/nla-digbench-scaling/divbin_valuebound10.i[950,963] [2025-02-05 15:06:55,282 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:06:55,289 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 15:06:55,302 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/nla-digbench-scaling/divbin_valuebound10.i[950,963] [2025-02-05 15:06:55,309 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:06:55,322 INFO L204 MainTranslator]: Completed translation [2025-02-05 15:06:55,323 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:55 WrapperNode [2025-02-05 15:06:55,324 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 15:06:55,326 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 15:06:55,326 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 15:06:55,326 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 15:06:55,332 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:55" (1/1) ... [2025-02-05 15:06:55,337 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:55" (1/1) ... [2025-02-05 15:06:55,349 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2025-02-05 15:06:55,350 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 15:06:55,350 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 15:06:55,351 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 15:06:55,351 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 15:06:55,356 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:55" (1/1) ... [2025-02-05 15:06:55,356 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:55" (1/1) ... [2025-02-05 15:06:55,357 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:55" (1/1) ... [2025-02-05 15:06:55,363 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 15:06:55,363 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:55" (1/1) ... [2025-02-05 15:06:55,363 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:55" (1/1) ... [2025-02-05 15:06:55,365 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:55" (1/1) ... [2025-02-05 15:06:55,366 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:55" (1/1) ... [2025-02-05 15:06:55,366 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:55" (1/1) ... [2025-02-05 15:06:55,367 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:55" (1/1) ... [2025-02-05 15:06:55,368 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 15:06:55,369 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 15:06:55,369 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 15:06:55,369 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 15:06:55,369 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:55" (1/1) ... [2025-02-05 15:06:55,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:06:55,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:06:55,398 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 15:06:55,402 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 15:06:55,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 15:06:55,424 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-02-05 15:06:55,424 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-02-05 15:06:55,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 15:06:55,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 15:06:55,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 15:06:55,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-05 15:06:55,425 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-05 15:06:55,466 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 15:06:55,468 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 15:06:55,588 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-02-05 15:06:55,588 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 15:06:55,596 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 15:06:55,596 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 15:06:55,597 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:06:55 BoogieIcfgContainer [2025-02-05 15:06:55,597 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 15:06:55,599 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 15:06:55,599 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 15:06:55,604 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 15:06:55,604 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 03:06:55" (1/3) ... [2025-02-05 15:06:55,605 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e0116ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:06:55, skipping insertion in model container [2025-02-05 15:06:55,605 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:55" (2/3) ... [2025-02-05 15:06:55,606 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e0116ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:06:55, skipping insertion in model container [2025-02-05 15:06:55,606 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:06:55" (3/3) ... [2025-02-05 15:06:55,608 INFO L128 eAbstractionObserver]: Analyzing ICFG divbin_valuebound10.i [2025-02-05 15:06:55,618 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 15:06:55,619 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG divbin_valuebound10.i that has 3 procedures, 29 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-02-05 15:06:55,661 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 15:06:55,673 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;@36eeba00, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 15:06:55,673 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 15:06:55,677 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 15:06:55,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-02-05 15:06:55,685 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:06:55,686 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:06:55,686 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:06:55,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:06:55,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1830921190, now seen corresponding path program 1 times [2025-02-05 15:06:55,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:06:55,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7346266] [2025-02-05 15:06:55,699 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:06:55,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:06:55,757 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-05 15:06:55,773 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-05 15:06:55,774 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:06:55,774 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:06:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 15:06:55,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:06:55,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7346266] [2025-02-05 15:06:55,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7346266] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:06:55,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814988055] [2025-02-05 15:06:55,843 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:06:55,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:06:55,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:06:55,846 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 15:06:55,848 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 15:06:55,889 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-05 15:06:55,914 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-05 15:06:55,916 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:06:55,916 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:06:55,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-02-05 15:06:55,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:06:55,934 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 15:06:55,936 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 15:06:55,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814988055] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:06:55,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:06:55,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-02-05 15:06:55,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385441344] [2025-02-05 15:06:55,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:06:55,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-05 15:06:55,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:06:55,959 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-05 15:06:55,959 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-05 15:06:55,961 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 15:06:55,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:06:55,978 INFO L93 Difference]: Finished difference Result 55 states and 80 transitions. [2025-02-05 15:06:55,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-05 15:06:55,980 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2025-02-05 15:06:55,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:06:55,985 INFO L225 Difference]: With dead ends: 55 [2025-02-05 15:06:55,985 INFO L226 Difference]: Without dead ends: 25 [2025-02-05 15:06:55,987 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-05 15:06:55,989 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:06:55,990 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:06:56,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-02-05 15:06:56,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2025-02-05 15:06:56,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-05 15:06:56,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2025-02-05 15:06:56,025 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 30 [2025-02-05 15:06:56,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:06:56,025 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2025-02-05 15:06:56,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 15:06:56,026 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2025-02-05 15:06:56,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-02-05 15:06:56,027 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:06:56,027 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:06:56,033 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 15:06:56,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-02-05 15:06:56,228 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:06:56,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:06:56,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1038815751, now seen corresponding path program 1 times [2025-02-05 15:06:56,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:06:56,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421486334] [2025-02-05 15:06:56,229 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:06:56,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:06:56,239 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-05 15:06:56,283 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-05 15:06:56,284 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:06:56,284 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:06:56,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201001834] [2025-02-05 15:06:56,286 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:06:56,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:06:56,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:06:56,288 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 15:06:56,289 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 15:06:56,322 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-05 15:06:56,351 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-05 15:06:56,351 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:06:56,351 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:06:56,352 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-05 15:06:56,355 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:06:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 15:06:56,781 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:06:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-05 15:06:57,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:06:57,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421486334] [2025-02-05 15:06:57,026 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:06:57,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201001834] [2025-02-05 15:06:57,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201001834] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-05 15:06:57,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:06:57,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2025-02-05 15:06:57,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666366713] [2025-02-05 15:06:57,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:06:57,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-05 15:06:57,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:06:57,028 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-05 15:06:57,029 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2025-02-05 15:06:57,029 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 15:06:59,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.69s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-05 15:07:00,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:07:00,051 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2025-02-05 15:07:00,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:07:00,052 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2025-02-05 15:07:00,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:07:00,053 INFO L225 Difference]: With dead ends: 37 [2025-02-05 15:07:00,053 INFO L226 Difference]: Without dead ends: 34 [2025-02-05 15:07:00,054 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2025-02-05 15:07:00,054 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:07:00,055 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 112 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2025-02-05 15:07:00,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-02-05 15:07:00,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2025-02-05 15:07:00,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 15:07:00,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2025-02-05 15:07:00,062 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 31 [2025-02-05 15:07:00,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:07:00,063 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2025-02-05 15:07:00,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 15:07:00,063 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2025-02-05 15:07:00,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-02-05 15:07:00,064 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:07:00,064 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:07:00,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-05 15:07:00,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:07:00,269 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:07:00,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:07:00,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1878888186, now seen corresponding path program 1 times [2025-02-05 15:07:00,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:07:00,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293126757] [2025-02-05 15:07:00,270 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:07:00,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:07:00,275 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-05 15:07:00,303 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-05 15:07:00,303 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:07:00,303 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:07:00,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1188498206] [2025-02-05 15:07:00,305 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:07:00,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:07:00,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:07:00,312 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 15:07:00,323 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 15:07:00,350 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-05 15:07:00,374 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-05 15:07:00,374 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:07:00,374 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:07:00,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-05 15:07:00,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:07:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-05 15:07:00,517 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:07:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-02-05 15:07:00,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:07:00,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293126757] [2025-02-05 15:07:00,633 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:07:00,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188498206] [2025-02-05 15:07:00,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188498206] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-05 15:07:00,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:07:00,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2025-02-05 15:07:00,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627709293] [2025-02-05 15:07:00,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:07:00,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:07:00,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:07:00,635 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:07:00,636 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-02-05 15:07:00,636 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 15:07:04,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2025-02-05 15:07:08,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2025-02-05 15:07:08,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:07:08,706 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2025-02-05 15:07:08,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:07:08,707 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2025-02-05 15:07:08,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:07:08,708 INFO L225 Difference]: With dead ends: 44 [2025-02-05 15:07:08,708 INFO L226 Difference]: Without dead ends: 42 [2025-02-05 15:07:08,708 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-02-05 15:07:08,709 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:07:08,709 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 94 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 2 Unknown, 0 Unchecked, 8.0s Time] [2025-02-05 15:07:08,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-02-05 15:07:08,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2025-02-05 15:07:08,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 15:07:08,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2025-02-05 15:07:08,722 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 33 [2025-02-05 15:07:08,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:07:08,722 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2025-02-05 15:07:08,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 15:07:08,722 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2025-02-05 15:07:08,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-05 15:07:08,723 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:07:08,723 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:07:08,729 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 15:07:08,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:07:08,924 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:07:08,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:07:08,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1646908200, now seen corresponding path program 1 times [2025-02-05 15:07:08,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:07:08,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909019783] [2025-02-05 15:07:08,925 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:07:08,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:07:08,931 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-05 15:07:08,951 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-05 15:07:08,951 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:07:08,951 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:07:09,189 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-05 15:07:09,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:07:09,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909019783] [2025-02-05 15:07:09,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909019783] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:07:09,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631692912] [2025-02-05 15:07:09,190 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:07:09,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:07:09,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:07:09,194 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 15:07:09,199 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 15:07:09,227 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-05 15:07:09,241 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-05 15:07:09,241 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:07:09,241 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:07:09,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-05 15:07:09,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:07:09,337 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-02-05 15:07:09,337 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:07:09,437 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-02-05 15:07:09,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631692912] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:07:09,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:07:09,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 12 [2025-02-05 15:07:09,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977323500] [2025-02-05 15:07:09,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:07:09,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 15:07:09,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:07:09,439 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 15:07:09,440 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2025-02-05 15:07:09,441 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-05 15:07:09,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:07:09,893 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2025-02-05 15:07:09,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-05 15:07:09,893 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2025-02-05 15:07:09,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:07:09,895 INFO L225 Difference]: With dead ends: 56 [2025-02-05 15:07:09,895 INFO L226 Difference]: Without dead ends: 44 [2025-02-05 15:07:09,895 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2025-02-05 15:07:09,896 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 10 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 15:07:09,896 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 180 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 15:07:09,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-02-05 15:07:09,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2025-02-05 15:07:09,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 15:07:09,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2025-02-05 15:07:09,908 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 39 [2025-02-05 15:07:09,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:07:09,908 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2025-02-05 15:07:09,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-05 15:07:09,909 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2025-02-05 15:07:09,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-05 15:07:09,911 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:07:09,911 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:07:09,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-05 15:07:10,116 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:07:10,116 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:07:10,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:07:10,117 INFO L85 PathProgramCache]: Analyzing trace with hash -882084258, now seen corresponding path program 1 times [2025-02-05 15:07:10,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:07:10,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815884205] [2025-02-05 15:07:10,117 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:07:10,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:07:10,122 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-05 15:07:10,148 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-05 15:07:10,152 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:07:10,152 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:07:10,499 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-05 15:07:10,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:07:10,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815884205] [2025-02-05 15:07:10,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815884205] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:07:10,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:07:10,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-05 15:07:10,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733349468] [2025-02-05 15:07:10,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:07:10,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-05 15:07:10,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:07:10,501 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-05 15:07:10,501 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-05 15:07:10,501 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-05 15:07:10,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:07:10,530 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2025-02-05 15:07:10,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 15:07:10,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2025-02-05 15:07:10,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:07:10,533 INFO L225 Difference]: With dead ends: 45 [2025-02-05 15:07:10,533 INFO L226 Difference]: Without dead ends: 32 [2025-02-05 15:07:10,533 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-05 15:07:10,534 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:07:10,536 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 48 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:07:10,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-02-05 15:07:10,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2025-02-05 15:07:10,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 15:07:10,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2025-02-05 15:07:10,549 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 39 [2025-02-05 15:07:10,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:07:10,549 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2025-02-05 15:07:10,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-05 15:07:10,549 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2025-02-05 15:07:10,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-02-05 15:07:10,550 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:07:10,550 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:07:10,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-05 15:07:10,550 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:07:10,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:07:10,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1352104353, now seen corresponding path program 1 times [2025-02-05 15:07:10,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:07:10,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153211040] [2025-02-05 15:07:10,551 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:07:10,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:07:10,555 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-02-05 15:07:10,576 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-02-05 15:07:10,576 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:07:10,576 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:07:10,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [792685025] [2025-02-05 15:07:10,578 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:07:10,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:07:10,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:07:10,580 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 15:07:10,582 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 15:07:10,607 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-02-05 15:07:10,658 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-02-05 15:07:10,658 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:07:10,658 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:07:10,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-05 15:07:10,661 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:07:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-05 15:07:10,878 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:07:11,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:07:11,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153211040] [2025-02-05 15:07:11,050 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:07:11,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792685025] [2025-02-05 15:07:11,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792685025] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:07:11,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:07:11,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2025-02-05 15:07:11,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360011747] [2025-02-05 15:07:11,051 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 15:07:11,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-05 15:07:11,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:07:11,052 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-05 15:07:11,052 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2025-02-05 15:07:11,052 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2025-02-05 15:07:11,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:07:11,170 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2025-02-05 15:07:11,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 15:07:11,171 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2025-02-05 15:07:11,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:07:11,172 INFO L225 Difference]: With dead ends: 46 [2025-02-05 15:07:11,172 INFO L226 Difference]: Without dead ends: 44 [2025-02-05 15:07:11,172 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2025-02-05 15:07:11,173 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:07:11,173 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 115 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:07:11,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-02-05 15:07:11,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2025-02-05 15:07:11,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-05 15:07:11,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2025-02-05 15:07:11,187 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 41 [2025-02-05 15:07:11,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:07:11,187 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2025-02-05 15:07:11,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2025-02-05 15:07:11,188 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2025-02-05 15:07:11,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-02-05 15:07:11,191 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:07:11,191 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:07:11,198 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 15:07:11,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:07:11,395 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:07:11,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:07:11,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1793870020, now seen corresponding path program 2 times [2025-02-05 15:07:11,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:07:11,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324418876] [2025-02-05 15:07:11,396 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:07:11,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:07:11,404 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 49 statements into 2 equivalence classes. [2025-02-05 15:07:11,458 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-02-05 15:07:11,458 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:07:11,458 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:07:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-05 15:07:12,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:07:12,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324418876] [2025-02-05 15:07:12,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324418876] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:07:12,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120214707] [2025-02-05 15:07:12,577 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:07:12,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:07:12,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:07:12,579 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 15:07:12,582 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 15:07:12,607 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 49 statements into 2 equivalence classes. [2025-02-05 15:07:12,663 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-02-05 15:07:12,663 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:07:12,663 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:07:12,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-02-05 15:07:12,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:07:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-05 15:07:13,145 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:07:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-05 15:07:13,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120214707] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:07:13,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:07:13,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2025-02-05 15:07:13,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738713324] [2025-02-05 15:07:13,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:07:13,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-05 15:07:13,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:07:13,914 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-05 15:07:13,914 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2025-02-05 15:07:13,915 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 25 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 20 states have internal predecessors, (52), 12 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (17), 12 states have call predecessors, (17), 11 states have call successors, (17) [2025-02-05 15:07:14,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:07:14,710 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2025-02-05 15:07:14,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-05 15:07:14,711 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 20 states have internal predecessors, (52), 12 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (17), 12 states have call predecessors, (17), 11 states have call successors, (17) Word has length 49 [2025-02-05 15:07:14,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:07:14,711 INFO L225 Difference]: With dead ends: 79 [2025-02-05 15:07:14,711 INFO L226 Difference]: Without dead ends: 49 [2025-02-05 15:07:14,712 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2025-02-05 15:07:14,712 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-05 15:07:14,713 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 333 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-02-05 15:07:14,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2025-02-05 15:07:14,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2025-02-05 15:07:14,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-05 15:07:14,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2025-02-05 15:07:14,732 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 49 [2025-02-05 15:07:14,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:07:14,734 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2025-02-05 15:07:14,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 20 states have internal predecessors, (52), 12 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (17), 12 states have call predecessors, (17), 11 states have call successors, (17) [2025-02-05 15:07:14,734 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2025-02-05 15:07:14,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-02-05 15:07:14,735 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:07:14,735 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:07:14,744 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 15:07:14,935 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,SelfDestructingSolverStorable6 [2025-02-05 15:07:14,936 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:07:14,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:07:14,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1677265797, now seen corresponding path program 3 times [2025-02-05 15:07:14,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:07:14,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722876092] [2025-02-05 15:07:14,937 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:07:14,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:07:14,943 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 51 statements into 4 equivalence classes. [2025-02-05 15:07:15,014 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 51 of 51 statements. [2025-02-05 15:07:15,015 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-05 15:07:15,015 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:07:15,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191163031] [2025-02-05 15:07:15,016 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:07:15,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:07:15,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:07:15,019 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 15:07:15,020 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 15:07:15,046 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 51 statements into 4 equivalence classes. [2025-02-05 15:07:15,532 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 45 of 51 statements. [2025-02-05 15:07:15,532 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 15:07:15,532 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:07:15,533 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-02-05 15:07:15,536 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:18,605 WARN L286 SmtUtils]: Spent 8.13s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)