./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ebdf8b0d6633d593d56778eaf5218135ab2be92cae14e75cdda2462494f96410 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 15:08:48,276 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 15:08:48,353 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 15:08:48,359 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 15:08:48,359 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 15:08:48,390 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 15:08:48,391 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 15:08:48,392 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 15:08:48,392 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 15:08:48,393 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 15:08:48,394 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 15:08:48,394 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 15:08:48,394 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 15:08:48,394 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 15:08:48,394 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 15:08:48,394 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 15:08:48,394 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 15:08:48,394 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 15:08:48,394 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 15:08:48,394 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 15:08:48,395 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 15:08:48,395 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 15:08:48,395 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 15:08:48,395 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 15:08:48,395 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 15:08:48,395 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 15:08:48,395 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 15:08:48,395 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 15:08:48,395 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 15:08:48,395 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 15:08:48,395 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 15:08:48,395 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 15:08:48,395 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:08:48,396 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 15:08:48,397 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 15:08:48,397 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 15:08:48,397 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 15:08:48,397 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 15:08:48,397 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 15:08:48,397 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 15:08:48,397 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 15:08:48,397 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 15:08:48,397 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 15:08:48,398 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 -> ebdf8b0d6633d593d56778eaf5218135ab2be92cae14e75cdda2462494f96410 [2025-02-05 15:08:48,652 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 15:08:48,663 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 15:08:48,665 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 15:08:48,666 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 15:08:48,666 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 15:08:48,669 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c [2025-02-05 15:08:49,971 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2eb7e7a62/bfd7ef41043a46ec9d0527981898de6c/FLAGb06fd35c6 [2025-02-05 15:08:50,184 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 15:08:50,185 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c [2025-02-05 15:08:50,204 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2eb7e7a62/bfd7ef41043a46ec9d0527981898de6c/FLAGb06fd35c6 [2025-02-05 15:08:50,236 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2eb7e7a62/bfd7ef41043a46ec9d0527981898de6c [2025-02-05 15:08:50,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 15:08:50,242 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 15:08:50,244 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 15:08:50,244 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 15:08:50,248 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 15:08:50,249 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:08:50" (1/1) ... [2025-02-05 15:08:50,250 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@909fc9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:50, skipping insertion in model container [2025-02-05 15:08:50,250 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:08:50" (1/1) ... [2025-02-05 15:08:50,268 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 15:08:50,402 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/egcd2-ll_valuebound2.c[490,503] [2025-02-05 15:08:50,435 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:08:50,445 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 15:08:50,455 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/egcd2-ll_valuebound2.c[490,503] [2025-02-05 15:08:50,469 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:08:50,485 INFO L204 MainTranslator]: Completed translation [2025-02-05 15:08:50,486 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:50 WrapperNode [2025-02-05 15:08:50,486 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 15:08:50,488 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 15:08:50,488 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 15:08:50,488 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 15:08:50,494 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:50" (1/1) ... [2025-02-05 15:08:50,499 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:50" (1/1) ... [2025-02-05 15:08:50,516 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 73 [2025-02-05 15:08:50,517 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 15:08:50,518 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 15:08:50,518 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 15:08:50,518 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 15:08:50,525 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:50" (1/1) ... [2025-02-05 15:08:50,526 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:50" (1/1) ... [2025-02-05 15:08:50,527 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:50" (1/1) ... [2025-02-05 15:08:50,541 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 15:08:50,542 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:50" (1/1) ... [2025-02-05 15:08:50,542 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:50" (1/1) ... [2025-02-05 15:08:50,544 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:50" (1/1) ... [2025-02-05 15:08:50,548 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:50" (1/1) ... [2025-02-05 15:08:50,549 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:50" (1/1) ... [2025-02-05 15:08:50,551 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:50" (1/1) ... [2025-02-05 15:08:50,552 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 15:08:50,553 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 15:08:50,553 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 15:08:50,553 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 15:08:50,554 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:50" (1/1) ... [2025-02-05 15:08:50,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:08:50,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:50,584 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 15:08:50,592 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 15:08:50,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 15:08:50,615 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-02-05 15:08:50,615 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-02-05 15:08:50,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 15:08:50,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 15:08:50,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 15:08:50,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-05 15:08:50,615 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-05 15:08:50,667 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 15:08:50,669 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 15:08:50,830 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2025-02-05 15:08:50,831 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 15:08:50,839 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 15:08:50,840 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 15:08:50,841 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:08:50 BoogieIcfgContainer [2025-02-05 15:08:50,841 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 15:08:50,843 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 15:08:50,843 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 15:08:50,847 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 15:08:50,848 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 03:08:50" (1/3) ... [2025-02-05 15:08:50,848 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@517ba4ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:08:50, skipping insertion in model container [2025-02-05 15:08:50,848 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:50" (2/3) ... [2025-02-05 15:08:50,849 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@517ba4ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:08:50, skipping insertion in model container [2025-02-05 15:08:50,849 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:08:50" (3/3) ... [2025-02-05 15:08:50,850 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound2.c [2025-02-05 15:08:50,864 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 15:08:50,865 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd2-ll_valuebound2.c that has 3 procedures, 35 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-02-05 15:08:50,919 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 15:08:50,932 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;@524ef493, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 15:08:50,933 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 15:08:50,937 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.368421052631579) internal successors, (26), 21 states have internal predecessors, (26), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2025-02-05 15:08:50,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-05 15:08:50,944 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:50,945 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:50,945 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:50,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:50,951 INFO L85 PathProgramCache]: Analyzing trace with hash 517095282, now seen corresponding path program 1 times [2025-02-05 15:08:50,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:50,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598453116] [2025-02-05 15:08:50,958 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:50,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:51,029 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-05 15:08:51,044 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-05 15:08:51,044 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:51,044 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:51,122 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-02-05 15:08:51,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:51,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598453116] [2025-02-05 15:08:51,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598453116] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:51,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746002669] [2025-02-05 15:08:51,125 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:51,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:51,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:51,129 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 15:08:51,131 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 15:08:51,185 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-05 15:08:51,223 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-05 15:08:51,223 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:51,224 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:51,228 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-02-05 15:08:51,232 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-02-05 15:08:51,251 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 15:08:51,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746002669] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:08:51,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:08:51,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-02-05 15:08:51,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928169170] [2025-02-05 15:08:51,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:08:51,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-05 15:08:51,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:51,277 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-05 15:08:51,278 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-05 15:08:51,280 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.368421052631579) internal successors, (26), 21 states have internal predecessors, (26), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-05 15:08:51,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:51,302 INFO L93 Difference]: Finished difference Result 67 states and 108 transitions. [2025-02-05 15:08:51,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-05 15:08:51,305 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2025-02-05 15:08:51,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:51,311 INFO L225 Difference]: With dead ends: 67 [2025-02-05 15:08:51,311 INFO L226 Difference]: Without dead ends: 31 [2025-02-05 15:08:51,314 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 40 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 15:08:51,320 INFO L435 NwaCegarLoop]: 46 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, 46 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 15:08:51,321 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:08:51,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-02-05 15:08:51,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2025-02-05 15:08:51,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2025-02-05 15:08:51,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2025-02-05 15:08:51,361 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39 [2025-02-05 15:08:51,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:51,363 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2025-02-05 15:08:51,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-05 15:08:51,364 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2025-02-05 15:08:51,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-02-05 15:08:51,365 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:51,365 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 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 15:08:51,371 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 15:08:51,566 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 15:08:51,566 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:51,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:51,567 INFO L85 PathProgramCache]: Analyzing trace with hash 253254996, now seen corresponding path program 1 times [2025-02-05 15:08:51,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:51,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324095140] [2025-02-05 15:08:51,567 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:51,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:51,577 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-05 15:08:51,610 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-05 15:08:51,614 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:51,615 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:51,834 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-05 15:08:51,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:51,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324095140] [2025-02-05 15:08:51,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324095140] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:51,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804051467] [2025-02-05 15:08:51,835 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:51,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:51,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:51,838 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 15:08:51,840 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 15:08:51,878 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-05 15:08:51,917 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-05 15:08:51,917 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:51,917 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:51,919 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-05 15:08:51,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:52,184 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-05 15:08:52,185 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:52,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804051467] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:52,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:08:52,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2025-02-05 15:08:52,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39136863] [2025-02-05 15:08:52,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:52,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-05 15:08:52,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:52,368 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-05 15:08:52,369 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2025-02-05 15:08:52,369 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2025-02-05 15:08:52,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:52,611 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2025-02-05 15:08:52,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 15:08:52,612 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 40 [2025-02-05 15:08:52,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:52,613 INFO L225 Difference]: With dead ends: 52 [2025-02-05 15:08:52,613 INFO L226 Difference]: Without dead ends: 44 [2025-02-05 15:08:52,614 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2025-02-05 15:08:52,614 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 31 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:52,615 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 194 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:08:52,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-02-05 15:08:52,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2025-02-05 15:08:52,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2025-02-05 15:08:52,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2025-02-05 15:08:52,625 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 40 [2025-02-05 15:08:52,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:52,625 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2025-02-05 15:08:52,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2025-02-05 15:08:52,625 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2025-02-05 15:08:52,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-02-05 15:08:52,628 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:52,628 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 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 15:08:52,636 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 15:08:52,832 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 15:08:52,832 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:52,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:52,833 INFO L85 PathProgramCache]: Analyzing trace with hash -710041082, now seen corresponding path program 1 times [2025-02-05 15:08:52,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:52,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693127765] [2025-02-05 15:08:52,833 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:52,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:52,840 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-02-05 15:08:52,866 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-02-05 15:08:52,869 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:52,869 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:52,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582340222] [2025-02-05 15:08:52,874 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:52,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:52,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:52,877 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 15:08:52,879 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 15:08:52,904 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-02-05 15:08:52,920 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-02-05 15:08:52,920 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:52,920 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:52,921 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-05 15:08:52,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-02-05 15:08:52,962 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 15:08:52,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:52,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693127765] [2025-02-05 15:08:52,963 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:08:52,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582340222] [2025-02-05 15:08:52,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582340222] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:08:52,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:08:52,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:08:52,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045601300] [2025-02-05 15:08:52,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:08:52,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:08:52,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:52,964 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:08:52,964 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:08:52,965 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-02-05 15:08:53,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:53,025 INFO L93 Difference]: Finished difference Result 62 states and 86 transitions. [2025-02-05 15:08:53,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:08:53,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2025-02-05 15:08:53,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:53,027 INFO L225 Difference]: With dead ends: 62 [2025-02-05 15:08:53,027 INFO L226 Difference]: Without dead ends: 60 [2025-02-05 15:08:53,028 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-05 15:08:53,028 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:53,031 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 136 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:08:53,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-02-05 15:08:53,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2025-02-05 15:08:53,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2025-02-05 15:08:53,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2025-02-05 15:08:53,053 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 41 [2025-02-05 15:08:53,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:53,053 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2025-02-05 15:08:53,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-02-05 15:08:53,054 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2025-02-05 15:08:53,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-02-05 15:08:53,055 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:53,055 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 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 15:08:53,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-05 15:08:53,255 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 15:08:53,255 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:53,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:53,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1754206818, now seen corresponding path program 1 times [2025-02-05 15:08:53,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:53,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286077045] [2025-02-05 15:08:53,256 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:53,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:53,266 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-02-05 15:08:53,290 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-02-05 15:08:53,291 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:53,291 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:53,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191163031] [2025-02-05 15:08:53,293 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:53,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:53,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:53,296 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 15:08:53,298 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 15:08:53,330 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-02-05 15:08:53,348 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-02-05 15:08:53,349 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:53,349 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:53,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-05 15:08:53,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-02-05 15:08:53,455 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 15:08:53,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:53,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286077045] [2025-02-05 15:08:53,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:08:53,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191163031] [2025-02-05 15:08:53,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191163031] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:08:53,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:08:53,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:08:53,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931291568] [2025-02-05 15:08:53,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:08:53,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:08:53,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:53,458 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:08:53,458 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:08:53,459 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-05 15:08:53,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:53,512 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2025-02-05 15:08:53,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:08:53,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2025-02-05 15:08:53,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:53,516 INFO L225 Difference]: With dead ends: 58 [2025-02-05 15:08:53,516 INFO L226 Difference]: Without dead ends: 56 [2025-02-05 15:08:53,518 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-05 15:08:53,519 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 5 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:53,520 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 146 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:08:53,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2025-02-05 15:08:53,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2025-02-05 15:08:53,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2025-02-05 15:08:53,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2025-02-05 15:08:53,539 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 46 [2025-02-05 15:08:53,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:53,540 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2025-02-05 15:08:53,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-05 15:08:53,540 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2025-02-05 15:08:53,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-02-05 15:08:53,541 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:53,541 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 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 15:08:53,548 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 15:08:53,742 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 15:08:53,742 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:53,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:53,742 INFO L85 PathProgramCache]: Analyzing trace with hash -490653406, now seen corresponding path program 1 times [2025-02-05 15:08:53,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:53,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105061986] [2025-02-05 15:08:53,742 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:53,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:53,749 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-02-05 15:08:53,762 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-02-05 15:08:53,763 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:53,763 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:53,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895044899] [2025-02-05 15:08:53,764 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:53,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:53,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:53,766 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 15:08:53,771 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 15:08:53,805 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-02-05 15:08:53,831 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-02-05 15:08:53,831 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:53,831 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:53,837 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-05 15:08:53,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-05 15:08:54,130 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:54,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:54,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105061986] [2025-02-05 15:08:54,195 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:08:54,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895044899] [2025-02-05 15:08:54,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895044899] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:54,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:08:54,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2025-02-05 15:08:54,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701812314] [2025-02-05 15:08:54,195 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:54,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-05 15:08:54,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:54,196 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-05 15:08:54,196 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-02-05 15:08:54,197 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2025-02-05 15:08:54,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:54,306 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2025-02-05 15:08:54,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-05 15:08:54,306 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2025-02-05 15:08:54,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:54,307 INFO L225 Difference]: With dead ends: 62 [2025-02-05 15:08:54,308 INFO L226 Difference]: Without dead ends: 60 [2025-02-05 15:08:54,308 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2025-02-05 15:08:54,309 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:54,310 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 138 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:08:54,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-02-05 15:08:54,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2025-02-05 15:08:54,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 37 states have internal predecessors, (38), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2025-02-05 15:08:54,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2025-02-05 15:08:54,322 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 56 [2025-02-05 15:08:54,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:54,323 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2025-02-05 15:08:54,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2025-02-05 15:08:54,324 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2025-02-05 15:08:54,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2025-02-05 15:08:54,326 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:54,326 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 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, 1, 1, 1, 1, 1] [2025-02-05 15:08:54,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-05 15:08:54,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:54,530 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:54,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:54,530 INFO L85 PathProgramCache]: Analyzing trace with hash -801998749, now seen corresponding path program 1 times [2025-02-05 15:08:54,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:54,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653668110] [2025-02-05 15:08:54,531 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:54,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:54,540 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-02-05 15:08:54,561 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-02-05 15:08:54,561 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:54,561 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:54,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1269913483] [2025-02-05 15:08:54,563 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:54,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:54,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:54,566 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 15:08:54,567 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 15:08:54,598 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-02-05 15:08:54,618 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-02-05 15:08:54,618 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:54,618 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:54,619 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-05 15:08:54,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-02-05 15:08:54,689 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-02-05 15:08:54,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:54,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653668110] [2025-02-05 15:08:54,793 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:08:54,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269913483] [2025-02-05 15:08:54,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269913483] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:08:54,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:08:54,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2025-02-05 15:08:54,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979388628] [2025-02-05 15:08:54,794 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:54,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 15:08:54,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:54,795 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 15:08:54,795 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-02-05 15:08:54,795 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2025-02-05 15:08:54,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:54,903 INFO L93 Difference]: Finished difference Result 87 states and 118 transitions. [2025-02-05 15:08:54,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-05 15:08:54,904 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 63 [2025-02-05 15:08:54,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:54,905 INFO L225 Difference]: With dead ends: 87 [2025-02-05 15:08:54,905 INFO L226 Difference]: Without dead ends: 85 [2025-02-05 15:08:54,905 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-02-05 15:08:54,906 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:54,906 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 156 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:08:54,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2025-02-05 15:08:54,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 55. [2025-02-05 15:08:54,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2025-02-05 15:08:54,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2025-02-05 15:08:54,930 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 63 [2025-02-05 15:08:54,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:54,932 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2025-02-05 15:08:54,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2025-02-05 15:08:54,932 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2025-02-05 15:08:54,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-02-05 15:08:54,934 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:54,934 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:08:54,941 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 15:08:55,134 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,SelfDestructingSolverStorable5 [2025-02-05 15:08:55,135 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:55,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:55,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1476647327, now seen corresponding path program 1 times [2025-02-05 15:08:55,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:55,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915500156] [2025-02-05 15:08:55,135 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:55,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:55,143 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-02-05 15:08:55,162 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-02-05 15:08:55,163 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:55,163 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:55,364 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2025-02-05 15:08:55,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:55,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915500156] [2025-02-05 15:08:55,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915500156] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:55,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427423153] [2025-02-05 15:08:55,366 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:55,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:55,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:55,368 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 15:08:55,371 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 15:08:55,403 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-02-05 15:08:55,426 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-02-05 15:08:55,426 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:55,426 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:55,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-05 15:08:55,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2025-02-05 15:08:55,493 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:55,610 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2025-02-05 15:08:55,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427423153] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:08:55,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:08:55,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2025-02-05 15:08:55,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833979961] [2025-02-05 15:08:55,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:55,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 15:08:55,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:55,612 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 15:08:55,612 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2025-02-05 15:08:55,612 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-02-05 15:08:55,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:55,819 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2025-02-05 15:08:55,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 15:08:55,820 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 65 [2025-02-05 15:08:55,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:55,821 INFO L225 Difference]: With dead ends: 102 [2025-02-05 15:08:55,821 INFO L226 Difference]: Without dead ends: 94 [2025-02-05 15:08:55,822 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 122 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2025-02-05 15:08:55,822 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 34 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:55,823 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 303 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:08:55,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2025-02-05 15:08:55,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2025-02-05 15:08:55,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2025-02-05 15:08:55,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 118 transitions. [2025-02-05 15:08:55,853 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 118 transitions. Word has length 65 [2025-02-05 15:08:55,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:55,853 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 118 transitions. [2025-02-05 15:08:55,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-02-05 15:08:55,854 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 118 transitions. [2025-02-05 15:08:55,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-02-05 15:08:55,855 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:55,855 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 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, 1, 1, 1, 1] [2025-02-05 15:08:55,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-05 15:08:56,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:56,059 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:56,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:56,059 INFO L85 PathProgramCache]: Analyzing trace with hash -9888337, now seen corresponding path program 1 times [2025-02-05 15:08:56,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:56,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550290652] [2025-02-05 15:08:56,060 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:56,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:56,065 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-02-05 15:08:56,077 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-02-05 15:08:56,077 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:56,077 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:56,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734398158] [2025-02-05 15:08:56,078 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:56,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:56,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:56,080 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:56,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-05 15:08:56,114 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-02-05 15:08:56,137 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-02-05 15:08:56,137 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:56,137 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:56,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-02-05 15:08:56,145 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:56,564 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-02-05 15:08:56,564 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:56,844 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-02-05 15:08:56,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:56,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550290652] [2025-02-05 15:08:56,845 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:08:56,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734398158] [2025-02-05 15:08:56,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734398158] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:08:56,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:08:56,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2025-02-05 15:08:56,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641442532] [2025-02-05 15:08:56,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:56,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-05 15:08:56,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:56,846 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-05 15:08:56,847 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2025-02-05 15:08:56,847 INFO L87 Difference]: Start difference. First operand 85 states and 118 transitions. Second operand has 19 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 11 states have call predecessors, (21), 11 states have call successors, (21) [2025-02-05 15:08:57,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:57,509 INFO L93 Difference]: Finished difference Result 136 states and 195 transitions. [2025-02-05 15:08:57,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-05 15:08:57,510 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 11 states have call predecessors, (21), 11 states have call successors, (21) Word has length 71 [2025-02-05 15:08:57,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:57,512 INFO L225 Difference]: With dead ends: 136 [2025-02-05 15:08:57,512 INFO L226 Difference]: Without dead ends: 133 [2025-02-05 15:08:57,512 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2025-02-05 15:08:57,513 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 93 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:57,513 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 299 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-05 15:08:57,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2025-02-05 15:08:57,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 123. [2025-02-05 15:08:57,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 68 states have internal predecessors, (80), 49 states have call successors, (49), 7 states have call predecessors, (49), 7 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2025-02-05 15:08:57,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 176 transitions. [2025-02-05 15:08:57,557 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 176 transitions. Word has length 71 [2025-02-05 15:08:57,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:57,557 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 176 transitions. [2025-02-05 15:08:57,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 11 states have call predecessors, (21), 11 states have call successors, (21) [2025-02-05 15:08:57,558 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 176 transitions. [2025-02-05 15:08:57,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2025-02-05 15:08:57,559 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:57,559 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 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, 1, 1] [2025-02-05 15:08:57,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-05 15:08:57,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:57,759 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:57,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:57,760 INFO L85 PathProgramCache]: Analyzing trace with hash 537813145, now seen corresponding path program 2 times [2025-02-05 15:08:57,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:57,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665961856] [2025-02-05 15:08:57,760 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:08:57,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:57,768 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 76 statements into 2 equivalence classes. [2025-02-05 15:08:57,794 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 76 of 76 statements. [2025-02-05 15:08:57,795 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:08:57,795 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:57,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087869157] [2025-02-05 15:08:57,798 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:08:57,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:57,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:57,800 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:57,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-05 15:08:57,829 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 76 statements into 2 equivalence classes. [2025-02-05 15:08:57,854 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 76 of 76 statements. [2025-02-05 15:08:57,854 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:08:57,854 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:57,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-05 15:08:57,861 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:58,023 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2025-02-05 15:08:58,023 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:58,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:58,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665961856] [2025-02-05 15:08:58,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:08:58,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087869157] [2025-02-05 15:08:58,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087869157] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:58,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:08:58,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2025-02-05 15:08:58,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124311823] [2025-02-05 15:08:58,059 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:58,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 15:08:58,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:58,060 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 15:08:58,060 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-02-05 15:08:58,060 INFO L87 Difference]: Start difference. First operand 123 states and 176 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-02-05 15:08:58,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:58,220 INFO L93 Difference]: Finished difference Result 140 states and 196 transitions. [2025-02-05 15:08:58,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-05 15:08:58,221 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 76 [2025-02-05 15:08:58,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:58,223 INFO L225 Difference]: With dead ends: 140 [2025-02-05 15:08:58,223 INFO L226 Difference]: Without dead ends: 138 [2025-02-05 15:08:58,223 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-02-05 15:08:58,224 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 12 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:58,224 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 216 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:08:58,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2025-02-05 15:08:58,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2025-02-05 15:08:58,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 76 states have internal predecessors, (89), 53 states have call successors, (53), 9 states have call predecessors, (53), 9 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2025-02-05 15:08:58,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 193 transitions. [2025-02-05 15:08:58,264 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 193 transitions. Word has length 76 [2025-02-05 15:08:58,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:58,266 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 193 transitions. [2025-02-05 15:08:58,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-02-05 15:08:58,266 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 193 transitions. [2025-02-05 15:08:58,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2025-02-05 15:08:58,267 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:58,267 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 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 15:08:58,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-05 15:08:58,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:58,471 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:58,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:58,471 INFO L85 PathProgramCache]: Analyzing trace with hash -845985745, now seen corresponding path program 3 times [2025-02-05 15:08:58,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:58,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706518810] [2025-02-05 15:08:58,472 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:08:58,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:58,477 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 81 statements into 6 equivalence classes. [2025-02-05 15:08:58,512 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 81 of 81 statements. [2025-02-05 15:08:58,512 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-05 15:08:58,512 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:58,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752317488] [2025-02-05 15:08:58,514 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:08:58,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:58,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:58,516 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:58,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-05 15:08:58,549 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 81 statements into 6 equivalence classes. [2025-02-05 15:08:58,572 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 50 of 81 statements. [2025-02-05 15:08:58,572 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 15:08:58,572 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:58,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-02-05 15:08:58,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 46 proven. 8 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2025-02-05 15:08:58,998 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:59,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:59,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706518810] [2025-02-05 15:08:59,293 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:08:59,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752317488] [2025-02-05 15:08:59,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752317488] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:59,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:08:59,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2025-02-05 15:08:59,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826255167] [2025-02-05 15:08:59,294 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:59,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-05 15:08:59,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:59,295 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-05 15:08:59,295 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2025-02-05 15:08:59,295 INFO L87 Difference]: Start difference. First operand 137 states and 193 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2025-02-05 15:08:59,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:59,609 INFO L93 Difference]: Finished difference Result 144 states and 199 transitions. [2025-02-05 15:08:59,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-05 15:08:59,609 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 81 [2025-02-05 15:08:59,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:59,610 INFO L225 Difference]: With dead ends: 144 [2025-02-05 15:08:59,611 INFO L226 Difference]: Without dead ends: 142 [2025-02-05 15:08:59,611 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2025-02-05 15:08:59,612 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:59,612 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 256 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:08:59,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2025-02-05 15:08:59,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2025-02-05 15:08:59,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 77 states have (on average 1.1948051948051948) internal successors, (92), 79 states have internal predecessors, (92), 53 states have call successors, (53), 10 states have call predecessors, (53), 10 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2025-02-05 15:08:59,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 196 transitions. [2025-02-05 15:08:59,643 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 196 transitions. Word has length 81 [2025-02-05 15:08:59,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:59,644 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 196 transitions. [2025-02-05 15:08:59,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2025-02-05 15:08:59,644 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 196 transitions. [2025-02-05 15:08:59,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2025-02-05 15:08:59,646 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:59,646 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2025-02-05 15:08:59,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-05 15:08:59,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-02-05 15:08:59,850 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:59,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:59,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1133840962, now seen corresponding path program 1 times [2025-02-05 15:08:59,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:59,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996387944] [2025-02-05 15:08:59,851 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:59,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:59,855 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 87 statements into 1 equivalence classes. [2025-02-05 15:08:59,867 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 87 of 87 statements. [2025-02-05 15:08:59,869 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:59,870 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:59,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [831376794] [2025-02-05 15:08:59,871 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:59,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:59,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:59,874 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:59,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-05 15:08:59,906 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 87 statements into 1 equivalence classes. [2025-02-05 15:08:59,928 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 87 of 87 statements. [2025-02-05 15:08:59,928 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:59,928 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:59,929 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-02-05 15:08:59,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:09:00,438 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2025-02-05 15:09:00,439 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:09:00,872 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2025-02-05 15:09:00,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:09:00,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996387944] [2025-02-05 15:09:00,872 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:09:00,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831376794] [2025-02-05 15:09:00,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831376794] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:09:00,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:09:00,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2025-02-05 15:09:00,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158073203] [2025-02-05 15:09:00,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:09:00,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-05 15:09:00,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:09:00,873 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-05 15:09:00,874 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2025-02-05 15:09:00,874 INFO L87 Difference]: Start difference. First operand 141 states and 196 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2025-02-05 15:09:02,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:09:02,650 INFO L93 Difference]: Finished difference Result 247 states and 370 transitions. [2025-02-05 15:09:02,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-05 15:09:02,651 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 87 [2025-02-05 15:09:02,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:09:02,653 INFO L225 Difference]: With dead ends: 247 [2025-02-05 15:09:02,653 INFO L226 Difference]: Without dead ends: 243 [2025-02-05 15:09:02,655 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2025-02-05 15:09:02,655 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 73 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:09:02,655 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 521 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-02-05 15:09:02,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2025-02-05 15:09:02,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 240. [2025-02-05 15:09:02,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 121 states have (on average 1.2479338842975207) internal successors, (151), 124 states have internal predecessors, (151), 106 states have call successors, (106), 12 states have call predecessors, (106), 12 states have return successors, (104), 103 states have call predecessors, (104), 104 states have call successors, (104) [2025-02-05 15:09:02,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 361 transitions. [2025-02-05 15:09:02,757 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 361 transitions. Word has length 87 [2025-02-05 15:09:02,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:09:02,758 INFO L471 AbstractCegarLoop]: Abstraction has 240 states and 361 transitions. [2025-02-05 15:09:02,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2025-02-05 15:09:02,758 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 361 transitions. [2025-02-05 15:09:02,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2025-02-05 15:09:02,759 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:09:02,759 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:09:02,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-05 15:09:02,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-02-05 15:09:02,960 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:09:02,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:09:02,960 INFO L85 PathProgramCache]: Analyzing trace with hash 134702886, now seen corresponding path program 4 times [2025-02-05 15:09:02,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:09:02,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116268836] [2025-02-05 15:09:02,961 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:09:02,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:09:02,968 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 101 statements into 2 equivalence classes. [2025-02-05 15:09:02,975 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 96 of 101 statements. [2025-02-05 15:09:02,975 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:09:02,975 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:09:03,070 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2025-02-05 15:09:03,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:09:03,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116268836] [2025-02-05 15:09:03,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116268836] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:09:03,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:09:03,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:09:03,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241703662] [2025-02-05 15:09:03,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:09:03,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:09:03,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:09:03,072 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:09:03,072 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:09:03,072 INFO L87 Difference]: Start difference. First operand 240 states and 361 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2025-02-05 15:09:03,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:09:03,209 INFO L93 Difference]: Finished difference Result 297 states and 440 transitions. [2025-02-05 15:09:03,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 15:09:03,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 101 [2025-02-05 15:09:03,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:09:03,212 INFO L225 Difference]: With dead ends: 297 [2025-02-05 15:09:03,212 INFO L226 Difference]: Without dead ends: 198 [2025-02-05 15:09:03,214 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-02-05 15:09:03,215 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 6 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:09:03,216 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 171 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:09:03,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2025-02-05 15:09:03,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 186. [2025-02-05 15:09:03,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 98 states have internal predecessors, (112), 78 states have call successors, (78), 12 states have call predecessors, (78), 12 states have return successors, (76), 75 states have call predecessors, (76), 76 states have call successors, (76) [2025-02-05 15:09:03,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 266 transitions. [2025-02-05 15:09:03,270 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 266 transitions. Word has length 101 [2025-02-05 15:09:03,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:09:03,271 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 266 transitions. [2025-02-05 15:09:03,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2025-02-05 15:09:03,271 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 266 transitions. [2025-02-05 15:09:03,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2025-02-05 15:09:03,272 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:09:03,272 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 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 15:09:03,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-02-05 15:09:03,272 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:09:03,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:09:03,273 INFO L85 PathProgramCache]: Analyzing trace with hash -298205812, now seen corresponding path program 1 times [2025-02-05 15:09:03,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:09:03,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129922637] [2025-02-05 15:09:03,273 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:09:03,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:09:03,280 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 103 statements into 1 equivalence classes. [2025-02-05 15:09:03,296 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 103 of 103 statements. [2025-02-05 15:09:03,296 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:09:03,296 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:09:03,593 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 32 proven. 23 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2025-02-05 15:09:03,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:09:03,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129922637] [2025-02-05 15:09:03,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129922637] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:09:03,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166848116] [2025-02-05 15:09:03,593 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:09:03,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:09:03,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:09:03,597 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:09:03,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-05 15:09:03,634 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 103 statements into 1 equivalence classes. [2025-02-05 15:09:03,661 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 103 of 103 statements. [2025-02-05 15:09:03,662 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:09:03,662 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:09:03,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 15:09:03,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:09:03,761 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 122 proven. 23 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2025-02-05 15:09:03,761 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:09:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 32 proven. 23 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2025-02-05 15:09:03,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166848116] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:09:03,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:09:03,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2025-02-05 15:09:03,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481692284] [2025-02-05 15:09:03,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:09:03,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-05 15:09:03,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:09:03,897 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-05 15:09:03,897 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2025-02-05 15:09:03,897 INFO L87 Difference]: Start difference. First operand 186 states and 266 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) [2025-02-05 15:09:04,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:09:04,201 INFO L93 Difference]: Finished difference Result 252 states and 360 transitions. [2025-02-05 15:09:04,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-05 15:09:04,201 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) Word has length 103 [2025-02-05 15:09:04,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:09:04,203 INFO L225 Difference]: With dead ends: 252 [2025-02-05 15:09:04,203 INFO L226 Difference]: Without dead ends: 165 [2025-02-05 15:09:04,204 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 201 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2025-02-05 15:09:04,204 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 31 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:09:04,204 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 347 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:09:04,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2025-02-05 15:09:04,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2025-02-05 15:09:04,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 86 states have (on average 1.1511627906976745) internal successors, (99), 89 states have internal predecessors, (99), 66 states have call successors, (66), 12 states have call predecessors, (66), 12 states have return successors, (64), 63 states have call predecessors, (64), 64 states have call successors, (64) [2025-02-05 15:09:04,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 229 transitions. [2025-02-05 15:09:04,262 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 229 transitions. Word has length 103 [2025-02-05 15:09:04,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:09:04,263 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 229 transitions. [2025-02-05 15:09:04,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) [2025-02-05 15:09:04,263 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 229 transitions. [2025-02-05 15:09:04,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2025-02-05 15:09:04,265 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:09:04,265 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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 15:09:04,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-05 15:09:04,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:09:04,466 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:09:04,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:09:04,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1248935735, now seen corresponding path program 1 times [2025-02-05 15:09:04,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:09:04,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304495143] [2025-02-05 15:09:04,467 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:09:04,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:09:04,473 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 117 statements into 1 equivalence classes. [2025-02-05 15:09:04,482 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 117 of 117 statements. [2025-02-05 15:09:04,482 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:09:04,482 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:09:04,595 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2025-02-05 15:09:04,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:09:04,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304495143] [2025-02-05 15:09:04,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304495143] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:09:04,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440334683] [2025-02-05 15:09:04,596 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:09:04,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:09:04,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:09:04,598 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:09:04,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-05 15:09:04,633 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 117 statements into 1 equivalence classes. [2025-02-05 15:09:04,660 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 117 of 117 statements. [2025-02-05 15:09:04,660 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:09:04,660 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:09:04,661 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-05 15:09:04,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:09:04,706 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 88 proven. 9 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2025-02-05 15:09:04,707 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:09:04,802 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2025-02-05 15:09:04,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440334683] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:09:04,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:09:04,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2025-02-05 15:09:04,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547964562] [2025-02-05 15:09:04,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:09:04,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 15:09:04,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:09:04,803 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 15:09:04,804 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-02-05 15:09:04,804 INFO L87 Difference]: Start difference. First operand 165 states and 229 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2025-02-05 15:09:04,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:09:04,990 INFO L93 Difference]: Finished difference Result 191 states and 268 transitions. [2025-02-05 15:09:04,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-05 15:09:04,991 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 117 [2025-02-05 15:09:04,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:09:04,992 INFO L225 Difference]: With dead ends: 191 [2025-02-05 15:09:04,992 INFO L226 Difference]: Without dead ends: 179 [2025-02-05 15:09:04,992 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 231 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2025-02-05 15:09:04,993 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 17 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:09:04,993 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 325 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:09:04,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2025-02-05 15:09:05,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 160. [2025-02-05 15:09:05,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 83 states have (on average 1.144578313253012) internal successors, (95), 85 states have internal predecessors, (95), 65 states have call successors, (65), 11 states have call predecessors, (65), 11 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2025-02-05 15:09:05,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 223 transitions. [2025-02-05 15:09:05,038 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 223 transitions. Word has length 117 [2025-02-05 15:09:05,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:09:05,038 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 223 transitions. [2025-02-05 15:09:05,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2025-02-05 15:09:05,038 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 223 transitions. [2025-02-05 15:09:05,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2025-02-05 15:09:05,039 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:09:05,039 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:09:05,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-05 15:09:05,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:09:05,244 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:09:05,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:09:05,244 INFO L85 PathProgramCache]: Analyzing trace with hash -2085521313, now seen corresponding path program 2 times [2025-02-05 15:09:05,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:09:05,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273597282] [2025-02-05 15:09:05,244 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:09:05,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:09:05,250 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 118 statements into 2 equivalence classes. [2025-02-05 15:09:05,270 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 118 of 118 statements. [2025-02-05 15:09:05,271 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:09:05,271 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:09:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 43 proven. 32 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2025-02-05 15:09:05,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:09:05,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273597282] [2025-02-05 15:09:05,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273597282] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:09:05,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863717953] [2025-02-05 15:09:05,454 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:09:05,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:09:05,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:09:05,457 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:09:05,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-05 15:09:05,496 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 118 statements into 2 equivalence classes. [2025-02-05 15:09:05,526 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 118 of 118 statements. [2025-02-05 15:09:05,526 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:09:05,527 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:09:05,528 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-05 15:09:05,530 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:09:05,650 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 103 proven. 18 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2025-02-05 15:09:05,650 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:09:05,791 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 43 proven. 32 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2025-02-05 15:09:05,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863717953] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:09:05,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:09:05,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2025-02-05 15:09:05,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635572923] [2025-02-05 15:09:05,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:09:05,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-05 15:09:05,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:09:05,794 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-05 15:09:05,794 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2025-02-05 15:09:05,794 INFO L87 Difference]: Start difference. First operand 160 states and 223 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 9 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) [2025-02-05 15:09:06,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:09:06,026 INFO L93 Difference]: Finished difference Result 193 states and 270 transitions. [2025-02-05 15:09:06,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-05 15:09:06,027 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 9 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) Word has length 118 [2025-02-05 15:09:06,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:09:06,028 INFO L225 Difference]: With dead ends: 193 [2025-02-05 15:09:06,028 INFO L226 Difference]: Without dead ends: 157 [2025-02-05 15:09:06,029 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 225 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2025-02-05 15:09:06,029 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 25 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:09:06,029 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 424 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:09:06,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2025-02-05 15:09:06,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2025-02-05 15:09:06,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 80 states have (on average 1.1125) internal successors, (89), 82 states have internal predecessors, (89), 65 states have call successors, (65), 11 states have call predecessors, (65), 11 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2025-02-05 15:09:06,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 217 transitions. [2025-02-05 15:09:06,071 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 217 transitions. Word has length 118 [2025-02-05 15:09:06,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:09:06,072 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 217 transitions. [2025-02-05 15:09:06,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 9 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) [2025-02-05 15:09:06,072 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 217 transitions. [2025-02-05 15:09:06,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2025-02-05 15:09:06,073 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:09:06,073 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:09:06,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-02-05 15:09:06,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-02-05 15:09:06,274 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:09:06,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:09:06,275 INFO L85 PathProgramCache]: Analyzing trace with hash -578293650, now seen corresponding path program 2 times [2025-02-05 15:09:06,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:09:06,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564952686] [2025-02-05 15:09:06,275 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:09:06,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:09:06,280 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 134 statements into 2 equivalence classes. [2025-02-05 15:09:06,295 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 134 of 134 statements. [2025-02-05 15:09:06,295 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:09:06,295 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:09:06,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1620523029] [2025-02-05 15:09:06,296 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:09:06,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:09:06,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:09:06,299 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:09:06,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-05 15:09:06,337 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 134 statements into 2 equivalence classes. [2025-02-05 15:09:06,375 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 134 of 134 statements. [2025-02-05 15:09:06,376 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:09:06,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:09:06,378 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-02-05 15:09:06,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:09:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 76 proven. 59 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2025-02-05 15:09:07,380 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:09:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2025-02-05 15:09:08,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:09:08,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564952686] [2025-02-05 15:09:08,298 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:09:08,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620523029] [2025-02-05 15:09:08,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620523029] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:09:08,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:09:08,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2025-02-05 15:09:08,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009667941] [2025-02-05 15:09:08,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:09:08,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-05 15:09:08,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:09:08,300 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-05 15:09:08,300 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2025-02-05 15:09:08,300 INFO L87 Difference]: Start difference. First operand 157 states and 217 transitions. Second operand has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 15 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2025-02-05 15:09:10,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:09:10,911 INFO L93 Difference]: Finished difference Result 232 states and 323 transitions. [2025-02-05 15:09:10,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-02-05 15:09:10,911 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 15 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) Word has length 134 [2025-02-05 15:09:10,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:09:10,913 INFO L225 Difference]: With dead ends: 232 [2025-02-05 15:09:10,913 INFO L226 Difference]: Without dead ends: 198 [2025-02-05 15:09:10,914 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 236 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=573, Invalid=2079, Unknown=0, NotChecked=0, Total=2652 [2025-02-05 15:09:10,915 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 116 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:09:10,916 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 542 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-02-05 15:09:10,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2025-02-05 15:09:10,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 184. [2025-02-05 15:09:10,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 96 states have (on average 1.1145833333333333) internal successors, (107), 98 states have internal predecessors, (107), 73 states have call successors, (73), 14 states have call predecessors, (73), 14 states have return successors, (72), 71 states have call predecessors, (72), 72 states have call successors, (72) [2025-02-05 15:09:10,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 252 transitions. [2025-02-05 15:09:10,995 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 252 transitions. Word has length 134 [2025-02-05 15:09:10,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:09:10,995 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 252 transitions. [2025-02-05 15:09:10,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 15 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2025-02-05 15:09:10,996 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 252 transitions. [2025-02-05 15:09:10,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2025-02-05 15:09:10,997 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:09:10,997 INFO L218 NwaCegarLoop]: trace histogram [18, 17, 17, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1] [2025-02-05 15:09:11,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-05 15:09:11,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-05 15:09:11,198 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:09:11,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:09:11,198 INFO L85 PathProgramCache]: Analyzing trace with hash 66659834, now seen corresponding path program 2 times [2025-02-05 15:09:11,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:09:11,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131529561] [2025-02-05 15:09:11,198 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:09:11,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:09:11,203 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 139 statements into 2 equivalence classes. [2025-02-05 15:09:11,221 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 139 of 139 statements. [2025-02-05 15:09:11,221 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:09:11,221 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:09:11,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820229586] [2025-02-05 15:09:11,222 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:09:11,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:09:11,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:09:11,225 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:09:11,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-05 15:09:11,264 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 139 statements into 2 equivalence classes. [2025-02-05 15:09:11,305 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 139 of 139 statements. [2025-02-05 15:09:11,305 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:09:11,305 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:09:11,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-02-05 15:09:11,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:09:11,928 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 86 proven. 54 refuted. 0 times theorem prover too weak. 541 trivial. 0 not checked. [2025-02-05 15:09:11,928 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:09:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 86 proven. 7 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2025-02-05 15:09:12,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:09:12,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131529561] [2025-02-05 15:09:12,114 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:09:12,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820229586] [2025-02-05 15:09:12,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820229586] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:09:12,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:09:12,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 25 [2025-02-05 15:09:12,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179866505] [2025-02-05 15:09:12,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:09:12,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-05 15:09:12,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:09:12,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-05 15:09:12,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2025-02-05 15:09:12,116 INFO L87 Difference]: Start difference. First operand 184 states and 252 transitions. Second operand has 25 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 21 states have internal predecessors, (50), 10 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) [2025-02-05 15:09:13,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:09:13,308 INFO L93 Difference]: Finished difference Result 205 states and 274 transitions. [2025-02-05 15:09:13,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-02-05 15:09:13,309 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 21 states have internal predecessors, (50), 10 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) Word has length 139 [2025-02-05 15:09:13,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:09:13,310 INFO L225 Difference]: With dead ends: 205 [2025-02-05 15:09:13,311 INFO L226 Difference]: Without dead ends: 192 [2025-02-05 15:09:13,311 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=323, Invalid=1657, Unknown=0, NotChecked=0, Total=1980 [2025-02-05 15:09:13,312 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 92 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-05 15:09:13,312 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 492 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-02-05 15:09:13,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2025-02-05 15:09:13,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 162. [2025-02-05 15:09:13,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 89 states have (on average 1.0786516853932584) internal successors, (96), 91 states have internal predecessors, (96), 57 states have call successors, (57), 15 states have call predecessors, (57), 15 states have return successors, (56), 55 states have call predecessors, (56), 56 states have call successors, (56) [2025-02-05 15:09:13,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 209 transitions. [2025-02-05 15:09:13,384 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 209 transitions. Word has length 139 [2025-02-05 15:09:13,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:09:13,385 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 209 transitions. [2025-02-05 15:09:13,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 21 states have internal predecessors, (50), 10 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) [2025-02-05 15:09:13,385 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 209 transitions. [2025-02-05 15:09:13,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2025-02-05 15:09:13,390 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:09:13,390 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:09:13,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-02-05 15:09:13,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-05 15:09:13,591 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:09:13,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:09:13,591 INFO L85 PathProgramCache]: Analyzing trace with hash 102957410, now seen corresponding path program 3 times [2025-02-05 15:09:13,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:09:13,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671203357] [2025-02-05 15:09:13,591 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:09:13,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:09:13,596 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 142 statements into 11 equivalence classes. [2025-02-05 15:09:13,625 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 132 of 142 statements. [2025-02-05 15:09:13,625 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-02-05 15:09:13,625 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:09:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 54 proven. 51 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2025-02-05 15:09:13,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:09:13,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671203357] [2025-02-05 15:09:13,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671203357] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:09:13,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739970582] [2025-02-05 15:09:13,854 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:09:13,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:09:13,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:09:13,857 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:09:13,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-05 15:09:13,899 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 142 statements into 11 equivalence classes. [2025-02-05 15:09:13,929 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 79 of 142 statements. [2025-02-05 15:09:13,929 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-05 15:09:13,929 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:09:13,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-02-05 15:09:13,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:09:14,400 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 83 proven. 49 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2025-02-05 15:09:14,400 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:09:14,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739970582] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:09:14,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:09:14,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2025-02-05 15:09:14,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820995663] [2025-02-05 15:09:14,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:09:14,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-05 15:09:14,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:09:14,692 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-05 15:09:14,692 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2025-02-05 15:09:14,692 INFO L87 Difference]: Start difference. First operand 162 states and 209 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 11 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (40), 11 states have call predecessors, (40), 11 states have call successors, (40) [2025-02-05 15:09:15,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:09:15,183 INFO L93 Difference]: Finished difference Result 254 states and 338 transitions. [2025-02-05 15:09:15,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-05 15:09:15,183 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 11 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (40), 11 states have call predecessors, (40), 11 states have call successors, (40) Word has length 142 [2025-02-05 15:09:15,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:09:15,185 INFO L225 Difference]: With dead ends: 254 [2025-02-05 15:09:15,185 INFO L226 Difference]: Without dead ends: 199 [2025-02-05 15:09:15,185 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2025-02-05 15:09:15,186 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 42 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 15:09:15,186 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 527 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 15:09:15,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2025-02-05 15:09:15,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2025-02-05 15:09:15,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 104 states have (on average 1.0865384615384615) internal successors, (113), 105 states have internal predecessors, (113), 75 states have call successors, (75), 17 states have call predecessors, (75), 17 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2025-02-05 15:09:15,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 262 transitions. [2025-02-05 15:09:15,260 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 262 transitions. Word has length 142 [2025-02-05 15:09:15,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:09:15,261 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 262 transitions. [2025-02-05 15:09:15,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 11 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (40), 11 states have call predecessors, (40), 11 states have call successors, (40) [2025-02-05 15:09:15,261 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 262 transitions. [2025-02-05 15:09:15,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2025-02-05 15:09:15,262 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:09:15,262 INFO L218 NwaCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:09:15,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-05 15:09:15,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-05 15:09:15,463 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:09:15,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:09:15,463 INFO L85 PathProgramCache]: Analyzing trace with hash -716466215, now seen corresponding path program 4 times [2025-02-05 15:09:15,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:09:15,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061731042] [2025-02-05 15:09:15,463 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:09:15,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:09:15,469 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 162 statements into 2 equivalence classes. [2025-02-05 15:09:15,484 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 157 of 162 statements. [2025-02-05 15:09:15,485 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:09:15,485 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:09:15,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 65 proven. 74 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2025-02-05 15:09:15,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:09:15,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061731042] [2025-02-05 15:09:15,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061731042] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:09:15,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157368864] [2025-02-05 15:09:15,736 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:09:15,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:09:15,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:09:15,738 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:09:15,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-05 15:09:15,775 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 162 statements into 2 equivalence classes. [2025-02-05 15:09:15,829 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 157 of 162 statements. [2025-02-05 15:09:15,830 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:09:15,830 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:09:15,835 INFO L256 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-05 15:09:15,838 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:09:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 149 proven. 68 refuted. 0 times theorem prover too weak. 807 trivial. 0 not checked. [2025-02-05 15:09:15,995 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:09:16,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 65 proven. 74 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2025-02-05 15:09:16,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157368864] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:09:16,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:09:16,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2025-02-05 15:09:16,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844398811] [2025-02-05 15:09:16,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:09:16,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-05 15:09:16,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:09:16,222 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-05 15:09:16,222 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2025-02-05 15:09:16,222 INFO L87 Difference]: Start difference. First operand 197 states and 262 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 20 states have internal predecessors, (63), 17 states have call successors, (65), 2 states have call predecessors, (65), 3 states have return successors, (65), 17 states have call predecessors, (65), 17 states have call successors, (65) [2025-02-05 15:09:16,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:09:16,589 INFO L93 Difference]: Finished difference Result 238 states and 318 transitions. [2025-02-05 15:09:16,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-05 15:09:16,590 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 20 states have internal predecessors, (63), 17 states have call successors, (65), 2 states have call predecessors, (65), 3 states have return successors, (65), 17 states have call predecessors, (65), 17 states have call successors, (65) Word has length 162 [2025-02-05 15:09:16,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:09:16,591 INFO L225 Difference]: With dead ends: 238 [2025-02-05 15:09:16,591 INFO L226 Difference]: Without dead ends: 146 [2025-02-05 15:09:16,592 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 310 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2025-02-05 15:09:16,592 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 22 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:09:16,592 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 701 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:09:16,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2025-02-05 15:09:16,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2025-02-05 15:09:16,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 states have internal predecessors, (79), 58 states have call successors, (58), 12 states have call predecessors, (58), 12 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2025-02-05 15:09:16,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 195 transitions. [2025-02-05 15:09:16,645 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 195 transitions. Word has length 162 [2025-02-05 15:09:16,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:09:16,645 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 195 transitions. [2025-02-05 15:09:16,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 20 states have internal predecessors, (63), 17 states have call successors, (65), 2 states have call predecessors, (65), 3 states have return successors, (65), 17 states have call predecessors, (65), 17 states have call successors, (65) [2025-02-05 15:09:16,646 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 195 transitions. [2025-02-05 15:09:16,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2025-02-05 15:09:16,647 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:09:16,648 INFO L218 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:09:16,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-02-05 15:09:16,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:09:16,852 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:09:16,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:09:16,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1805654237, now seen corresponding path program 5 times [2025-02-05 15:09:16,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:09:16,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621450621] [2025-02-05 15:09:16,853 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:09:16,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:09:16,860 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 169 statements into 12 equivalence classes. [2025-02-05 15:09:16,886 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 169 of 169 statements. [2025-02-05 15:09:16,887 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-02-05 15:09:16,887 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:09:17,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 73 proven. 75 refuted. 0 times theorem prover too weak. 1057 trivial. 0 not checked. [2025-02-05 15:09:17,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:09:17,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621450621] [2025-02-05 15:09:17,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621450621] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:09:17,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178111300] [2025-02-05 15:09:17,132 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:09:17,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:09:17,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:09:17,134 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:09:17,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-05 15:09:17,176 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 169 statements into 12 equivalence classes. [2025-02-05 15:09:17,229 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 169 of 169 statements. [2025-02-05 15:09:17,229 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-02-05 15:09:17,229 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:09:17,231 INFO L256 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-05 15:09:17,233 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:09:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 307 proven. 75 refuted. 0 times theorem prover too weak. 823 trivial. 0 not checked. [2025-02-05 15:09:17,359 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:09:17,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 91 proven. 57 refuted. 0 times theorem prover too weak. 1057 trivial. 0 not checked. [2025-02-05 15:09:17,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178111300] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:09:17,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:09:17,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 13] total 27 [2025-02-05 15:09:17,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422364776] [2025-02-05 15:09:17,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:09:17,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-05 15:09:17,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:09:17,763 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-05 15:09:17,763 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2025-02-05 15:09:17,763 INFO L87 Difference]: Start difference. First operand 146 states and 195 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 22 states have call successors, (80), 2 states have call predecessors, (80), 3 states have return successors, (80), 21 states have call predecessors, (80), 22 states have call successors, (80) [2025-02-05 15:09:18,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:09:18,098 INFO L93 Difference]: Finished difference Result 161 states and 220 transitions. [2025-02-05 15:09:18,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-05 15:09:18,098 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 22 states have call successors, (80), 2 states have call predecessors, (80), 3 states have return successors, (80), 21 states have call predecessors, (80), 22 states have call successors, (80) Word has length 169 [2025-02-05 15:09:18,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:09:18,099 INFO L225 Difference]: With dead ends: 161 [2025-02-05 15:09:18,099 INFO L226 Difference]: Without dead ends: 0 [2025-02-05 15:09:18,100 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=1003, Unknown=0, NotChecked=0, Total=1260 [2025-02-05 15:09:18,100 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 53 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:09:18,100 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 410 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:09:18,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-02-05 15:09:18,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-02-05 15:09:18,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 15:09:18,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-02-05 15:09:18,101 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 169 [2025-02-05 15:09:18,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:09:18,101 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-02-05 15:09:18,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 22 states have call successors, (80), 2 states have call predecessors, (80), 3 states have return successors, (80), 21 states have call predecessors, (80), 22 states have call successors, (80) [2025-02-05 15:09:18,101 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-02-05 15:09:18,101 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-02-05 15:09:18,104 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-02-05 15:09:18,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-02-05 15:09:18,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:09:18,308 INFO L422 BasicCegarLoop]: Path program histogram: [5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:09:18,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-02-05 15:09:23,928 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-05 15:09:23,946 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.02 03:09:23 BoogieIcfgContainer [2025-02-05 15:09:23,946 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-05 15:09:23,947 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-05 15:09:23,947 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-05 15:09:23,947 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-05 15:09:23,948 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:08:50" (3/4) ... [2025-02-05 15:09:23,949 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-02-05 15:09:23,956 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2025-02-05 15:09:23,959 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2025-02-05 15:09:23,966 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2025-02-05 15:09:23,967 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2025-02-05 15:09:23,967 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-02-05 15:09:23,967 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-02-05 15:09:24,043 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-02-05 15:09:24,043 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.yml [2025-02-05 15:09:24,044 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-05 15:09:24,044 INFO L158 Benchmark]: Toolchain (without parser) took 33802.47ms. Allocated memory was 142.6MB in the beginning and 444.6MB in the end (delta: 302.0MB). Free memory was 113.8MB in the beginning and 201.0MB in the end (delta: -87.2MB). Peak memory consumption was 213.1MB. Max. memory is 16.1GB. [2025-02-05 15:09:24,044 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 201.3MB. Free memory is still 124.2MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-05 15:09:24,045 INFO L158 Benchmark]: CACSL2BoogieTranslator took 243.26ms. Allocated memory is still 142.6MB. Free memory was 113.8MB in the beginning and 101.8MB in the end (delta: 12.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-05 15:09:24,045 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.84ms. Allocated memory is still 142.6MB. Free memory was 101.8MB in the beginning and 100.8MB in the end (delta: 985.4kB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-05 15:09:24,045 INFO L158 Benchmark]: Boogie Preprocessor took 34.27ms. Allocated memory is still 142.6MB. Free memory was 100.8MB in the beginning and 99.8MB in the end (delta: 999.8kB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-05 15:09:24,045 INFO L158 Benchmark]: IcfgBuilder took 288.15ms. Allocated memory is still 142.6MB. Free memory was 99.8MB in the beginning and 86.9MB in the end (delta: 12.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-05 15:09:24,045 INFO L158 Benchmark]: TraceAbstraction took 33103.56ms. Allocated memory was 142.6MB in the beginning and 444.6MB in the end (delta: 302.0MB). Free memory was 86.4MB in the beginning and 205.5MB in the end (delta: -119.1MB). Peak memory consumption was 181.8MB. Max. memory is 16.1GB. [2025-02-05 15:09:24,045 INFO L158 Benchmark]: Witness Printer took 96.65ms. Allocated memory is still 444.6MB. Free memory was 205.5MB in the beginning and 201.0MB in the end (delta: 4.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-05 15:09:24,046 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 201.3MB. Free memory is still 124.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 243.26ms. Allocated memory is still 142.6MB. Free memory was 113.8MB in the beginning and 101.8MB in the end (delta: 12.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.84ms. Allocated memory is still 142.6MB. Free memory was 101.8MB in the beginning and 100.8MB in the end (delta: 985.4kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 34.27ms. Allocated memory is still 142.6MB. Free memory was 100.8MB in the beginning and 99.8MB in the end (delta: 999.8kB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 288.15ms. Allocated memory is still 142.6MB. Free memory was 99.8MB in the beginning and 86.9MB in the end (delta: 12.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 33103.56ms. Allocated memory was 142.6MB in the beginning and 444.6MB in the end (delta: 302.0MB). Free memory was 86.4MB in the beginning and 205.5MB in the end (delta: -119.1MB). Peak memory consumption was 181.8MB. Max. memory is 16.1GB. * Witness Printer took 96.65ms. Allocated memory is still 444.6MB. Free memory was 205.5MB in the beginning and 201.0MB in the end (delta: 4.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 27.4s, OverallIterations: 20, TraceHistogramMax: 24, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 9.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 759 SdHoareTripleChecker+Valid, 5.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 687 mSDsluCounter, 6350 SdHoareTripleChecker+Invalid, 4.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5472 mSDsCounter, 871 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5026 IncrementalHoareTripleChecker+Invalid, 5897 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 871 mSolverCounterUnsat, 878 mSDtfsCounter, 5026 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3246 GetRequests, 2837 SyntacticMatches, 30 SemanticMatches, 379 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2004 ImplicationChecksByTransitivity, 6.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=240occurred in iteration=11, InterpolantAutomatonStates: 253, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 20 MinimizatonAttempts, 143 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 10.9s InterpolantComputationTime, 3599 NumberOfCodeBlocks, 3480 NumberOfCodeBlocksAsserted, 87 NumberOfCheckSat, 3993 ConstructedInterpolants, 0 QuantifiedInterpolants, 13459 SizeOfPredicates, 59 NumberOfNonLiveVariables, 3956 ConjunctsInSsa, 426 ConjunctsInUnsatCore, 40 InterpolantComputations, 4 PerfectInterpolantSequences, 15422/16444 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 41]: Location Invariant Derived location invariant: ((((((((((((((yy == ((long long) y * y)) && (p == 1)) && (1 <= y)) && (b == y)) && (b <= 2)) && (r == 0)) && (q == 0)) && (1 <= x)) && (xy == ((long long) x * y))) && (a == x)) && (x <= 2)) && (s == 1)) || ((((((((((b == 1) && (2 == xy)) && (p == 0)) && (2 == y)) && (yy <= 2147483646)) && (x == 1)) && (q == 1)) && (s == 0)) && (r == 1)) && (2 == a))) || ((((((((y <= 2) && (1 <= y)) && (b == 0)) && (1 <= a)) && (1 <= x)) && ((((__int128) r * y) + ((__int128) p * x)) == a)) && (x <= 2)) && ((((__int128) s * y) + ((__int128) q * x)) == 0))) - InvariantResult [Line: 47]: Location Invariant Derived location invariant: ((((((((((((((((((b == 1) && (2 == xy)) && (p == 0)) && (2 == y)) && (yy <= 2147483646)) && (x == 1)) && (q == 1)) && (k == 0)) && (s == 0)) && (r == 1)) && (2 == a)) && (2 == c)) || ((((((((((((((yy == ((long long) y * y)) && (p == 1)) && (1 <= y)) && (a == c)) && (b == y)) && (b <= 2)) && (r == 0)) && (q == 0)) && (k == 0)) && (1 <= x)) && (xy == ((long long) x * y))) && (a == x)) && (x <= 2)) && (s == 1))) || (((((((((((((k == 1) && (yy == ((long long) y * y))) && (p == 1)) && (1 <= y)) && (b == y)) && (r == 0)) && (q == 0)) && (xy == ((long long) x * y))) && (a == x)) && ((c == 0) || (b < ((__int128) c + 1)))) && (x <= 2)) && (s == 1)) && (((__int128) b + c) == x))) || ((((((((((((((a == (c + ((__int128) b * k))) && (yy == ((long long) y * y))) && (p == 1)) && (1 <= y)) && (b == y)) && ((((__int128) 2 * b) + c) <= 2)) && (r == 0)) && (q == 0)) && (1 <= x)) && (xy == ((long long) x * y))) && (a == x)) && ((c == 0) || (b < ((__int128) c + 1)))) && (x <= 2)) && (s == 1))) || ((((((((((((k == 1) && (b == 1)) && (2 == xy)) && (p == 0)) && (c == 1)) && (2 == y)) && (yy <= 2147483646)) && (x == 1)) && (q == 1)) && (s == 0)) && (r == 1)) && (2 == a))) || (((((((((((((p == 0) && (b == x)) && ((((__int128) 2 * b) + c) <= 2)) && (a == ((__int128) 2 + c))) && (yy <= 2147483646)) && (0 <= c)) && (q == 1)) && (s == 0)) && (1 <= x)) && (r == 1)) && ((((__int128) 2 * b) + c) == y)) && (xy == ((long long) x * y))) && (2 == k))) || (((((((((((((((c < (((__int128) 2 * b) + 1)) || (b < 2)) && (a == (c + ((__int128) b * k)))) && (yy == ((long long) y * y))) && (p == 1)) && (1 <= y)) && (b == y)) && (r == 0)) && (q == 0)) && (1 <= x)) && (((__int128) 2 * b) < ((__int128) c + 1))) && (xy == ((long long) x * y))) && (a == x)) && (x <= 2)) && (s == 1))) RESULT: Ultimate proved your program to be correct! [2025-02-05 15:09:24,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE