./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/Ackermann04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 551b0097 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/recursive/Ackermann04.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 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 04:03:45,347 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 04:03:45,424 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 04:03:45,432 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 04:03:45,433 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 04:03:45,463 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 04:03:45,464 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 04:03:45,465 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 04:03:45,465 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 04:03:45,465 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 04:03:45,466 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 04:03:45,466 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 04:03:45,467 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 04:03:45,467 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 04:03:45,467 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 04:03:45,467 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 04:03:45,467 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 04:03:45,467 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 04:03:45,467 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 04:03:45,467 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 04:03:45,467 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 04:03:45,467 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 04:03:45,467 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 04:03:45,467 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 04:03:45,467 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 04:03:45,467 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 04:03:45,468 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 04:03:45,468 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 04:03:45,468 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 04:03:45,468 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 04:03:45,468 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 04:03:45,468 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 04:03:45,468 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 04:03:45,468 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 04:03:45,468 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 04:03:45,469 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 04:03:45,469 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 04:03:45,469 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 04:03:45,469 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 04:03:45,469 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 04:03:45,469 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 04:03:45,469 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 04:03:45,469 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 04:03:45,469 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 04:03:45,469 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 04:03:45,469 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 04:03:45,469 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 04:03:45,469 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 04:03:45,470 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 -> 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 [2025-01-09 04:03:45,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 04:03:45,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 04:03:45,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 04:03:45,776 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 04:03:45,776 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 04:03:45,777 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann04.c [2025-01-09 04:03:47,134 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/266c1c52e/198c0dc3054b4e139d3333d6e651228c/FLAG6352e3bda [2025-01-09 04:03:47,390 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 04:03:47,391 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann04.c [2025-01-09 04:03:47,398 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/266c1c52e/198c0dc3054b4e139d3333d6e651228c/FLAG6352e3bda [2025-01-09 04:03:47,413 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/266c1c52e/198c0dc3054b4e139d3333d6e651228c [2025-01-09 04:03:47,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 04:03:47,418 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 04:03:47,419 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 04:03:47,419 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 04:03:47,423 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 04:03:47,424 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:03:47" (1/1) ... [2025-01-09 04:03:47,425 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ad90a5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:03:47, skipping insertion in model container [2025-01-09 04:03:47,425 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:03:47" (1/1) ... [2025-01-09 04:03:47,440 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 04:03:47,586 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/recursive/Ackermann04.c[1166,1179] [2025-01-09 04:03:47,590 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 04:03:47,599 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 04:03:47,614 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/recursive/Ackermann04.c[1166,1179] [2025-01-09 04:03:47,616 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 04:03:47,632 INFO L204 MainTranslator]: Completed translation [2025-01-09 04:03:47,634 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:03:47 WrapperNode [2025-01-09 04:03:47,634 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 04:03:47,635 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 04:03:47,635 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 04:03:47,635 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 04:03:47,641 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:03:47" (1/1) ... [2025-01-09 04:03:47,648 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:03:47" (1/1) ... [2025-01-09 04:03:47,661 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 33 [2025-01-09 04:03:47,662 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 04:03:47,663 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 04:03:47,663 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 04:03:47,663 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 04:03:47,671 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:03:47" (1/1) ... [2025-01-09 04:03:47,672 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:03:47" (1/1) ... [2025-01-09 04:03:47,673 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:03:47" (1/1) ... [2025-01-09 04:03:47,688 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]. [2025-01-09 04:03:47,689 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:03:47" (1/1) ... [2025-01-09 04:03:47,689 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:03:47" (1/1) ... [2025-01-09 04:03:47,695 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:03:47" (1/1) ... [2025-01-09 04:03:47,696 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:03:47" (1/1) ... [2025-01-09 04:03:47,698 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:03:47" (1/1) ... [2025-01-09 04:03:47,699 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:03:47" (1/1) ... [2025-01-09 04:03:47,703 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:03:47" (1/1) ... [2025-01-09 04:03:47,704 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 04:03:47,705 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 04:03:47,705 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 04:03:47,705 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 04:03:47,706 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:03:47" (1/1) ... [2025-01-09 04:03:47,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 04:03:47,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:03:47,740 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) [2025-01-09 04:03:47,747 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 [2025-01-09 04:03:47,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 04:03:47,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 04:03:47,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 04:03:47,769 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2025-01-09 04:03:47,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2025-01-09 04:03:47,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 04:03:47,826 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 04:03:47,828 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 04:03:47,971 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2025-01-09 04:03:47,972 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 04:03:47,983 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 04:03:47,984 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-09 04:03:47,985 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:03:47 BoogieIcfgContainer [2025-01-09 04:03:47,985 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 04:03:47,989 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 04:03:47,989 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 04:03:47,993 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 04:03:47,993 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 04:03:47" (1/3) ... [2025-01-09 04:03:47,995 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@297dc143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:03:47, skipping insertion in model container [2025-01-09 04:03:47,995 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:03:47" (2/3) ... [2025-01-09 04:03:47,996 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@297dc143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:03:47, skipping insertion in model container [2025-01-09 04:03:47,996 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:03:47" (3/3) ... [2025-01-09 04:03:47,998 INFO L128 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2025-01-09 04:03:48,014 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 04:03:48,016 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG Ackermann04.c that has 2 procedures, 23 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-01-09 04:03:48,069 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 04:03:48,079 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;@2bd5e480, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 04:03:48,079 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-09 04:03:48,084 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-01-09 04:03:48,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-01-09 04:03:48,092 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:03:48,093 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:03:48,093 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:03:48,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:03:48,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1470704041, now seen corresponding path program 1 times [2025-01-09 04:03:48,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:03:48,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795563341] [2025-01-09 04:03:48,106 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:03:48,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:03:48,163 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-01-09 04:03:48,181 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-01-09 04:03:48,182 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:03:48,182 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:03:48,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 04:03:48,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:03:48,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795563341] [2025-01-09 04:03:48,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795563341] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 04:03:48,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 04:03:48,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 04:03:48,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007550422] [2025-01-09 04:03:48,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 04:03:48,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 04:03:48,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:03:48,358 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 04:03:48,359 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 04:03:48,360 INFO L87 Difference]: Start difference. First operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 04:03:48,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:03:48,512 INFO L93 Difference]: Finished difference Result 37 states and 53 transitions. [2025-01-09 04:03:48,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 04:03:48,515 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2025-01-09 04:03:48,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:03:48,521 INFO L225 Difference]: With dead ends: 37 [2025-01-09 04:03:48,524 INFO L226 Difference]: Without dead ends: 27 [2025-01-09 04:03:48,526 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-01-09 04:03:48,529 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 04:03:48,530 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 71 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 04:03:48,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-01-09 04:03:48,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2025-01-09 04:03:48,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2025-01-09 04:03:48,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2025-01-09 04:03:48,561 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 12 [2025-01-09 04:03:48,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:03:48,561 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2025-01-09 04:03:48,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 04:03:48,562 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2025-01-09 04:03:48,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-01-09 04:03:48,563 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:03:48,563 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:03:48,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 04:03:48,563 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:03:48,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:03:48,564 INFO L85 PathProgramCache]: Analyzing trace with hash 941922339, now seen corresponding path program 1 times [2025-01-09 04:03:48,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:03:48,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418258199] [2025-01-09 04:03:48,564 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:03:48,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:03:48,574 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-01-09 04:03:48,590 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-01-09 04:03:48,591 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:03:48,591 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:03:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 04:03:48,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:03:48,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418258199] [2025-01-09 04:03:48,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418258199] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:03:48,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33945114] [2025-01-09 04:03:48,668 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:03:48,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:03:48,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:03:48,672 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) [2025-01-09 04:03:48,673 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 [2025-01-09 04:03:48,706 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-01-09 04:03:48,720 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-01-09 04:03:48,721 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:03:48,721 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:03:48,722 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-01-09 04:03:48,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:03:48,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 04:03:48,781 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:03:48,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 04:03:48,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33945114] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:03:48,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:03:48,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-01-09 04:03:48,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53163898] [2025-01-09 04:03:48,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:03:48,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-09 04:03:48,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:03:48,902 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-09 04:03:48,902 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-01-09 04:03:48,902 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2025-01-09 04:03:49,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:03:49,033 INFO L93 Difference]: Finished difference Result 69 states and 124 transitions. [2025-01-09 04:03:49,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-09 04:03:49,035 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 19 [2025-01-09 04:03:49,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:03:49,037 INFO L225 Difference]: With dead ends: 69 [2025-01-09 04:03:49,037 INFO L226 Difference]: Without dead ends: 45 [2025-01-09 04:03:49,038 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2025-01-09 04:03:49,038 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 17 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 04:03:49,040 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 66 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 04:03:49,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-01-09 04:03:49,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2025-01-09 04:03:49,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 8 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (27), 10 states have call predecessors, (27), 8 states have call successors, (27) [2025-01-09 04:03:49,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 66 transitions. [2025-01-09 04:03:49,063 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 66 transitions. Word has length 19 [2025-01-09 04:03:49,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:03:49,064 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 66 transitions. [2025-01-09 04:03:49,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2025-01-09 04:03:49,065 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 66 transitions. [2025-01-09 04:03:49,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-01-09 04:03:49,069 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:03:49,069 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:03:49,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-09 04:03:49,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:03:49,270 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:03:49,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:03:49,271 INFO L85 PathProgramCache]: Analyzing trace with hash -574784801, now seen corresponding path program 1 times [2025-01-09 04:03:49,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:03:49,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770792853] [2025-01-09 04:03:49,271 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:03:49,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:03:49,286 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-01-09 04:03:49,321 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-01-09 04:03:49,321 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:03:49,321 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:03:49,511 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2025-01-09 04:03:49,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:03:49,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770792853] [2025-01-09 04:03:49,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770792853] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:03:49,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112707790] [2025-01-09 04:03:49,512 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:03:49,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:03:49,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:03:49,514 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) [2025-01-09 04:03:49,518 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 [2025-01-09 04:03:49,554 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-01-09 04:03:49,581 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-01-09 04:03:49,581 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:03:49,581 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:03:49,583 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-09 04:03:49,585 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:03:49,668 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2025-01-09 04:03:49,668 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:03:50,289 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-01-09 04:03:50,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112707790] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:03:50,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:03:50,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 8 [2025-01-09 04:03:50,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64634628] [2025-01-09 04:03:50,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:03:50,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-09 04:03:50,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:03:50,292 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-09 04:03:50,292 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2025-01-09 04:03:50,292 INFO L87 Difference]: Start difference. First operand 41 states and 66 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2025-01-09 04:03:50,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:03:50,425 INFO L93 Difference]: Finished difference Result 62 states and 124 transitions. [2025-01-09 04:03:50,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-09 04:03:50,443 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) Word has length 45 [2025-01-09 04:03:50,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:03:50,445 INFO L225 Difference]: With dead ends: 62 [2025-01-09 04:03:50,446 INFO L226 Difference]: Without dead ends: 58 [2025-01-09 04:03:50,446 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-01-09 04:03:50,447 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 22 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 04:03:50,447 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 68 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 04:03:50,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-01-09 04:03:50,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2025-01-09 04:03:50,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 10 states have call successors, (10), 2 states have call predecessors, (10), 8 states have return successors, (60), 15 states have call predecessors, (60), 10 states have call successors, (60) [2025-01-09 04:03:50,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 109 transitions. [2025-01-09 04:03:50,473 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 109 transitions. Word has length 45 [2025-01-09 04:03:50,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:03:50,474 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 109 transitions. [2025-01-09 04:03:50,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2025-01-09 04:03:50,475 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 109 transitions. [2025-01-09 04:03:50,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2025-01-09 04:03:50,483 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:03:50,484 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:03:50,492 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 [2025-01-09 04:03:50,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:03:50,688 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:03:50,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:03:50,689 INFO L85 PathProgramCache]: Analyzing trace with hash -749766204, now seen corresponding path program 2 times [2025-01-09 04:03:50,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:03:50,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520861265] [2025-01-09 04:03:50,689 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 04:03:50,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:03:50,704 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 79 statements into 2 equivalence classes. [2025-01-09 04:03:50,743 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 79 of 79 statements. [2025-01-09 04:03:50,744 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 04:03:50,744 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:03:50,985 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 104 proven. 14 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2025-01-09 04:03:50,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:03:50,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520861265] [2025-01-09 04:03:50,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520861265] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:03:50,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539948949] [2025-01-09 04:03:50,986 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 04:03:50,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:03:50,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:03:50,988 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) [2025-01-09 04:03:50,991 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 [2025-01-09 04:03:51,034 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 79 statements into 2 equivalence classes. [2025-01-09 04:03:51,065 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 79 of 79 statements. [2025-01-09 04:03:51,066 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 04:03:51,066 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:03:51,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-01-09 04:03:51,070 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:03:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 141 proven. 37 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2025-01-09 04:03:51,184 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:03:52,892 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 85 proven. 65 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2025-01-09 04:03:52,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539948949] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:03:52,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:03:52,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 15] total 27 [2025-01-09 04:03:52,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249335355] [2025-01-09 04:03:52,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:03:52,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-01-09 04:03:52,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:03:52,895 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-01-09 04:03:52,896 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2025-01-09 04:03:52,896 INFO L87 Difference]: Start difference. First operand 54 states and 109 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 20 states have internal predecessors, (58), 7 states have call successors, (12), 2 states have call predecessors, (12), 11 states have return successors, (24), 14 states have call predecessors, (24), 7 states have call successors, (24) [2025-01-09 04:03:54,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:03:54,036 INFO L93 Difference]: Finished difference Result 294 states and 1388 transitions. [2025-01-09 04:03:54,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-01-09 04:03:54,037 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 20 states have internal predecessors, (58), 7 states have call successors, (12), 2 states have call predecessors, (12), 11 states have return successors, (24), 14 states have call predecessors, (24), 7 states have call successors, (24) Word has length 79 [2025-01-09 04:03:54,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:03:54,059 INFO L225 Difference]: With dead ends: 294 [2025-01-09 04:03:54,060 INFO L226 Difference]: Without dead ends: 245 [2025-01-09 04:03:54,069 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=692, Invalid=2848, Unknown=0, NotChecked=0, Total=3540 [2025-01-09 04:03:54,070 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 14 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-09 04:03:54,070 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 176 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-09 04:03:54,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2025-01-09 04:03:54,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 92. [2025-01-09 04:03:54,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 60 states have internal predecessors, (62), 16 states have call successors, (16), 2 states have call predecessors, (16), 17 states have return successors, (194), 29 states have call predecessors, (194), 16 states have call successors, (194) [2025-01-09 04:03:54,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 272 transitions. [2025-01-09 04:03:54,175 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 272 transitions. Word has length 79 [2025-01-09 04:03:54,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:03:54,177 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 272 transitions. [2025-01-09 04:03:54,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 20 states have internal predecessors, (58), 7 states have call successors, (12), 2 states have call predecessors, (12), 11 states have return successors, (24), 14 states have call predecessors, (24), 7 states have call successors, (24) [2025-01-09 04:03:54,177 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 272 transitions. [2025-01-09 04:03:54,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2025-01-09 04:03:54,186 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:03:54,186 INFO L218 NwaCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:03:54,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-01-09 04:03:54,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:03:54,388 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:03:54,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:03:54,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1991913426, now seen corresponding path program 3 times [2025-01-09 04:03:54,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:03:54,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438887187] [2025-01-09 04:03:54,389 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 04:03:54,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:03:54,402 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 131 statements into 12 equivalence classes. [2025-01-09 04:03:54,412 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 55 of 131 statements. [2025-01-09 04:03:54,412 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-01-09 04:03:54,412 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:03:54,460 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 192 proven. 22 refuted. 0 times theorem prover too weak. 621 trivial. 0 not checked. [2025-01-09 04:03:54,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:03:54,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438887187] [2025-01-09 04:03:54,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438887187] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:03:54,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567200413] [2025-01-09 04:03:54,461 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 04:03:54,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:03:54,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:03:54,463 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) [2025-01-09 04:03:54,467 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 [2025-01-09 04:03:54,525 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 131 statements into 12 equivalence classes. [2025-01-09 04:03:54,549 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 55 of 131 statements. [2025-01-09 04:03:54,549 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-01-09 04:03:54,549 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:03:54,550 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-09 04:03:54,553 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:03:54,610 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 348 proven. 3 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2025-01-09 04:03:54,610 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:03:55,033 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 216 proven. 27 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2025-01-09 04:03:55,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567200413] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:03:55,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:03:55,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 12 [2025-01-09 04:03:55,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184514898] [2025-01-09 04:03:55,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:03:55,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-09 04:03:55,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:03:55,037 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-09 04:03:55,038 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2025-01-09 04:03:55,039 INFO L87 Difference]: Start difference. First operand 92 states and 272 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2025-01-09 04:03:55,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:03:55,144 INFO L93 Difference]: Finished difference Result 144 states and 486 transitions. [2025-01-09 04:03:55,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-09 04:03:55,145 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 131 [2025-01-09 04:03:55,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:03:55,147 INFO L225 Difference]: With dead ends: 144 [2025-01-09 04:03:55,147 INFO L226 Difference]: Without dead ends: 57 [2025-01-09 04:03:55,150 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 252 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2025-01-09 04:03:55,150 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 40 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 04:03:55,151 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 89 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 04:03:55,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2025-01-09 04:03:55,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2025-01-09 04:03:55,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 8 states have call successors, (8), 2 states have call predecessors, (8), 8 states have return successors, (36), 11 states have call predecessors, (36), 8 states have call successors, (36) [2025-01-09 04:03:55,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 79 transitions. [2025-01-09 04:03:55,159 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 79 transitions. Word has length 131 [2025-01-09 04:03:55,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:03:55,160 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 79 transitions. [2025-01-09 04:03:55,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2025-01-09 04:03:55,160 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 79 transitions. [2025-01-09 04:03:55,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2025-01-09 04:03:55,162 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:03:55,162 INFO L218 NwaCegarLoop]: trace histogram [31, 31, 18, 13, 12, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:03:55,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-01-09 04:03:55,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:03:55,366 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:03:55,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:03:55,366 INFO L85 PathProgramCache]: Analyzing trace with hash 373404425, now seen corresponding path program 4 times [2025-01-09 04:03:55,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:03:55,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781252506] [2025-01-09 04:03:55,367 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 04:03:55,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:03:55,378 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 210 statements into 2 equivalence classes. [2025-01-09 04:03:55,406 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 175 of 210 statements. [2025-01-09 04:03:55,407 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-09 04:03:55,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:03:55,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2307 backedges. 432 proven. 724 refuted. 0 times theorem prover too weak. 1151 trivial. 0 not checked. [2025-01-09 04:03:55,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:03:55,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781252506] [2025-01-09 04:03:55,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781252506] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:03:55,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188791365] [2025-01-09 04:03:55,940 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 04:03:55,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:03:55,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:03:55,942 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) [2025-01-09 04:03:55,945 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 [2025-01-09 04:03:56,026 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 210 statements into 2 equivalence classes. [2025-01-09 04:03:56,078 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 175 of 210 statements. [2025-01-09 04:03:56,078 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-09 04:03:56,078 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:03:56,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-01-09 04:03:56,091 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:03:56,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2307 backedges. 432 proven. 712 refuted. 0 times theorem prover too weak. 1163 trivial. 0 not checked. [2025-01-09 04:03:56,202 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:03:58,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2307 backedges. 432 proven. 746 refuted. 0 times theorem prover too weak. 1129 trivial. 0 not checked. [2025-01-09 04:03:58,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188791365] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:03:58,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:03:58,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 15] total 18 [2025-01-09 04:03:58,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653861892] [2025-01-09 04:03:58,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:03:58,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-09 04:03:58,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:03:58,485 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-09 04:03:58,485 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2025-01-09 04:03:58,485 INFO L87 Difference]: Start difference. First operand 48 states and 79 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 13 states have call successors, (23), 1 states have call predecessors, (23), 8 states have return successors, (28), 7 states have call predecessors, (28), 13 states have call successors, (28) [2025-01-09 04:03:58,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:03:58,707 INFO L93 Difference]: Finished difference Result 122 states and 280 transitions. [2025-01-09 04:03:58,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-09 04:03:58,708 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 13 states have call successors, (23), 1 states have call predecessors, (23), 8 states have return successors, (28), 7 states have call predecessors, (28), 13 states have call successors, (28) Word has length 210 [2025-01-09 04:03:58,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:03:58,710 INFO L225 Difference]: With dead ends: 122 [2025-01-09 04:03:58,710 INFO L226 Difference]: Without dead ends: 79 [2025-01-09 04:03:58,711 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 415 SyntacticMatches, 12 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2025-01-09 04:03:58,713 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 97 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 04:03:58,714 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 153 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 04:03:58,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-01-09 04:03:58,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2025-01-09 04:03:58,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 55 states have internal predecessors, (60), 15 states have call successors, (15), 7 states have call predecessors, (15), 11 states have return successors, (68), 16 states have call predecessors, (68), 15 states have call successors, (68) [2025-01-09 04:03:58,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 143 transitions. [2025-01-09 04:03:58,732 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 143 transitions. Word has length 210 [2025-01-09 04:03:58,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:03:58,734 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 143 transitions. [2025-01-09 04:03:58,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 13 states have call successors, (23), 1 states have call predecessors, (23), 8 states have return successors, (28), 7 states have call predecessors, (28), 13 states have call successors, (28) [2025-01-09 04:03:58,735 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 143 transitions. [2025-01-09 04:03:58,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2025-01-09 04:03:58,736 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:03:58,736 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 10, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:03:58,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-01-09 04:03:58,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:03:58,937 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:03:58,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:03:58,938 INFO L85 PathProgramCache]: Analyzing trace with hash -270180431, now seen corresponding path program 5 times [2025-01-09 04:03:58,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:03:58,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587340362] [2025-01-09 04:03:58,938 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 04:03:58,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:03:58,949 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 118 statements into 13 equivalence classes. [2025-01-09 04:03:58,961 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 66 of 118 statements. [2025-01-09 04:03:58,961 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-01-09 04:03:58,961 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:03:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 112 proven. 247 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2025-01-09 04:03:59,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:03:59,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587340362] [2025-01-09 04:03:59,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587340362] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:03:59,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315388387] [2025-01-09 04:03:59,314 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 04:03:59,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:03:59,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:03:59,316 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:03:59,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-01-09 04:03:59,393 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 118 statements into 13 equivalence classes. [2025-01-09 04:03:59,414 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 66 of 118 statements. [2025-01-09 04:03:59,414 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-01-09 04:03:59,415 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:03:59,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-01-09 04:03:59,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:03:59,509 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 385 proven. 71 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2025-01-09 04:03:59,509 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:04:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 126 proven. 215 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2025-01-09 04:04:01,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315388387] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:04:01,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:04:01,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 16] total 28 [2025-01-09 04:04:01,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374899405] [2025-01-09 04:04:01,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:04:01,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-01-09 04:04:01,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:04:01,044 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-01-09 04:04:01,044 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2025-01-09 04:04:01,046 INFO L87 Difference]: Start difference. First operand 79 states and 143 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 21 states have internal predecessors, (67), 11 states have call successors, (17), 2 states have call predecessors, (17), 12 states have return successors, (29), 15 states have call predecessors, (29), 11 states have call successors, (29) [2025-01-09 04:04:02,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:04:02,077 INFO L93 Difference]: Finished difference Result 229 states and 473 transitions. [2025-01-09 04:04:02,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-01-09 04:04:02,078 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 21 states have internal predecessors, (67), 11 states have call successors, (17), 2 states have call predecessors, (17), 12 states have return successors, (29), 15 states have call predecessors, (29), 11 states have call successors, (29) Word has length 118 [2025-01-09 04:04:02,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:04:02,080 INFO L225 Difference]: With dead ends: 229 [2025-01-09 04:04:02,080 INFO L226 Difference]: Without dead ends: 148 [2025-01-09 04:04:02,082 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 222 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=852, Invalid=3308, Unknown=0, NotChecked=0, Total=4160 [2025-01-09 04:04:02,083 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 74 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-09 04:04:02,083 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 234 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-09 04:04:02,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2025-01-09 04:04:02,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 101. [2025-01-09 04:04:02,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 69 states have internal predecessors, (74), 19 states have call successors, (19), 9 states have call predecessors, (19), 14 states have return successors, (60), 22 states have call predecessors, (60), 19 states have call successors, (60) [2025-01-09 04:04:02,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 153 transitions. [2025-01-09 04:04:02,099 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 153 transitions. Word has length 118 [2025-01-09 04:04:02,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:04:02,099 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 153 transitions. [2025-01-09 04:04:02,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 21 states have internal predecessors, (67), 11 states have call successors, (17), 2 states have call predecessors, (17), 12 states have return successors, (29), 15 states have call predecessors, (29), 11 states have call successors, (29) [2025-01-09 04:04:02,099 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 153 transitions. [2025-01-09 04:04:02,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2025-01-09 04:04:02,101 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:04:02,101 INFO L218 NwaCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:04:02,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-01-09 04:04:02,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-01-09 04:04:02,305 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:04:02,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:04:02,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1811622132, now seen corresponding path program 6 times [2025-01-09 04:04:02,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:04:02,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120988152] [2025-01-09 04:04:02,305 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 04:04:02,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:04:02,313 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 131 statements into 14 equivalence classes. [2025-01-09 04:04:02,360 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) and asserted 131 of 131 statements. [2025-01-09 04:04:02,361 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2025-01-09 04:04:02,361 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:04:02,743 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 141 proven. 306 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2025-01-09 04:04:02,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:04:02,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120988152] [2025-01-09 04:04:02,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120988152] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:04:02,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793590464] [2025-01-09 04:04:02,744 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 04:04:02,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:04:02,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:04:02,746 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) [2025-01-09 04:04:02,749 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 [2025-01-09 04:04:02,843 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 131 statements into 14 equivalence classes. [2025-01-09 04:04:02,891 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) and asserted 131 of 131 statements. [2025-01-09 04:04:02,891 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2025-01-09 04:04:02,891 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:04:02,893 INFO L256 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-01-09 04:04:02,895 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:04:02,963 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 475 proven. 114 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2025-01-09 04:04:02,964 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:04:04,517 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 155 proven. 295 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2025-01-09 04:04:04,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793590464] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:04:04,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:04:04,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 17] total 22 [2025-01-09 04:04:04,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190211428] [2025-01-09 04:04:04,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:04:04,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-01-09 04:04:04,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:04:04,518 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-01-09 04:04:04,518 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2025-01-09 04:04:04,519 INFO L87 Difference]: Start difference. First operand 101 states and 153 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 19 states have internal predecessors, (67), 12 states have call successors, (18), 2 states have call predecessors, (18), 11 states have return successors, (27), 11 states have call predecessors, (27), 12 states have call successors, (27) [2025-01-09 04:04:04,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:04:04,826 INFO L93 Difference]: Finished difference Result 193 states and 343 transitions. [2025-01-09 04:04:04,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-01-09 04:04:04,826 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 19 states have internal predecessors, (67), 12 states have call successors, (18), 2 states have call predecessors, (18), 11 states have return successors, (27), 11 states have call predecessors, (27), 12 states have call successors, (27) Word has length 131 [2025-01-09 04:04:04,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:04:04,829 INFO L225 Difference]: With dead ends: 193 [2025-01-09 04:04:04,829 INFO L226 Difference]: Without dead ends: 100 [2025-01-09 04:04:04,831 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 249 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=337, Invalid=1223, Unknown=0, NotChecked=0, Total=1560 [2025-01-09 04:04:04,831 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 19 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 04:04:04,832 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 164 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 04:04:04,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2025-01-09 04:04:04,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2025-01-09 04:04:04,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 68 states have internal predecessors, (73), 18 states have call successors, (18), 9 states have call predecessors, (18), 14 states have return successors, (59), 22 states have call predecessors, (59), 18 states have call successors, (59) [2025-01-09 04:04:04,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 150 transitions. [2025-01-09 04:04:04,850 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 150 transitions. Word has length 131 [2025-01-09 04:04:04,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:04:04,850 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 150 transitions. [2025-01-09 04:04:04,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 19 states have internal predecessors, (67), 12 states have call successors, (18), 2 states have call predecessors, (18), 11 states have return successors, (27), 11 states have call predecessors, (27), 12 states have call successors, (27) [2025-01-09 04:04:04,850 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 150 transitions. [2025-01-09 04:04:04,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2025-01-09 04:04:04,852 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:04:04,852 INFO L218 NwaCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:04:04,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-01-09 04:04:05,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:04:05,053 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:04:05,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:04:05,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1701842998, now seen corresponding path program 7 times [2025-01-09 04:04:05,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:04:05,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125499959] [2025-01-09 04:04:05,053 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 04:04:05,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:04:05,061 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 157 statements into 1 equivalence classes. [2025-01-09 04:04:05,080 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 157 of 157 statements. [2025-01-09 04:04:05,080 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:04:05,081 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:04:05,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 439 proven. 281 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2025-01-09 04:04:05,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:04:05,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125499959] [2025-01-09 04:04:05,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125499959] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:04:05,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677249858] [2025-01-09 04:04:05,642 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 04:04:05,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:04:05,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:04:05,645 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) [2025-01-09 04:04:05,647 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 [2025-01-09 04:04:05,772 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 157 statements into 1 equivalence classes. [2025-01-09 04:04:05,818 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 157 of 157 statements. [2025-01-09 04:04:05,818 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:04:05,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:04:05,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-01-09 04:04:05,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:04:05,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2025-01-09 04:04:05,917 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:04:09,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 467 proven. 286 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2025-01-09 04:04:09,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677249858] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:04:09,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:04:09,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 27] total 35 [2025-01-09 04:04:09,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748296231] [2025-01-09 04:04:09,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:04:09,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-01-09 04:04:09,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:04:09,445 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-01-09 04:04:09,445 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2025-01-09 04:04:09,445 INFO L87 Difference]: Start difference. First operand 100 states and 150 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 29 states have internal predecessors, (75), 14 states have call successors, (17), 1 states have call predecessors, (17), 17 states have return successors, (32), 17 states have call predecessors, (32), 14 states have call successors, (32) [2025-01-09 04:04:10,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:04:10,224 INFO L93 Difference]: Finished difference Result 224 states and 396 transitions. [2025-01-09 04:04:10,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-01-09 04:04:10,224 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 29 states have internal predecessors, (75), 14 states have call successors, (17), 1 states have call predecessors, (17), 17 states have return successors, (32), 17 states have call predecessors, (32), 14 states have call successors, (32) Word has length 157 [2025-01-09 04:04:10,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:04:10,227 INFO L225 Difference]: With dead ends: 224 [2025-01-09 04:04:10,227 INFO L226 Difference]: Without dead ends: 133 [2025-01-09 04:04:10,230 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 297 SyntacticMatches, 14 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=817, Invalid=3605, Unknown=0, NotChecked=0, Total=4422 [2025-01-09 04:04:10,230 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 68 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-09 04:04:10,231 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 277 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-09 04:04:10,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2025-01-09 04:04:10,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 115. [2025-01-09 04:04:10,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 77 states have internal predecessors, (82), 21 states have call successors, (21), 9 states have call predecessors, (21), 17 states have return successors, (80), 28 states have call predecessors, (80), 21 states have call successors, (80) [2025-01-09 04:04:10,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 183 transitions. [2025-01-09 04:04:10,260 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 183 transitions. Word has length 157 [2025-01-09 04:04:10,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:04:10,261 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 183 transitions. [2025-01-09 04:04:10,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 29 states have internal predecessors, (75), 14 states have call successors, (17), 1 states have call predecessors, (17), 17 states have return successors, (32), 17 states have call predecessors, (32), 14 states have call successors, (32) [2025-01-09 04:04:10,261 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 183 transitions. [2025-01-09 04:04:10,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2025-01-09 04:04:10,263 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:04:10,263 INFO L218 NwaCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:04:10,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-01-09 04:04:10,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:04:10,464 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:04:10,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:04:10,464 INFO L85 PathProgramCache]: Analyzing trace with hash 332854534, now seen corresponding path program 8 times [2025-01-09 04:04:10,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:04:10,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865182822] [2025-01-09 04:04:10,464 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 04:04:10,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:04:10,473 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 183 statements into 2 equivalence classes. [2025-01-09 04:04:10,496 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 183 of 183 statements. [2025-01-09 04:04:10,496 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 04:04:10,496 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:04:11,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 686 proven. 74 refuted. 0 times theorem prover too weak. 981 trivial. 0 not checked. [2025-01-09 04:04:11,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:04:11,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865182822] [2025-01-09 04:04:11,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865182822] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:04:11,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264375698] [2025-01-09 04:04:11,179 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 04:04:11,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:04:11,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:04:11,182 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) [2025-01-09 04:04:11,183 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 [2025-01-09 04:04:11,338 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 183 statements into 2 equivalence classes. [2025-01-09 04:04:11,389 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 183 of 183 statements. [2025-01-09 04:04:11,390 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 04:04:11,390 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:04:11,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-01-09 04:04:11,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:04:11,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 657 proven. 84 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2025-01-09 04:04:11,461 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:04:17,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 711 proven. 75 refuted. 0 times theorem prover too weak. 955 trivial. 0 not checked. [2025-01-09 04:04:17,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264375698] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:04:17,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:04:17,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 33] total 38 [2025-01-09 04:04:17,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7927562] [2025-01-09 04:04:17,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:04:17,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-01-09 04:04:17,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:04:17,596 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-01-09 04:04:17,597 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2025-01-09 04:04:17,597 INFO L87 Difference]: Start difference. First operand 115 states and 183 transitions. Second operand has 38 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 31 states have internal predecessors, (59), 6 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (23), 13 states have call predecessors, (23), 6 states have call successors, (23) [2025-01-09 04:04:18,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:04:18,783 INFO L93 Difference]: Finished difference Result 192 states and 341 transitions. [2025-01-09 04:04:18,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2025-01-09 04:04:18,784 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 31 states have internal predecessors, (59), 6 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (23), 13 states have call predecessors, (23), 6 states have call successors, (23) Word has length 183 [2025-01-09 04:04:18,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:04:18,789 INFO L225 Difference]: With dead ends: 192 [2025-01-09 04:04:18,789 INFO L226 Difference]: Without dead ends: 188 [2025-01-09 04:04:18,791 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 343 SyntacticMatches, 20 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1027, Invalid=4673, Unknown=0, NotChecked=0, Total=5700 [2025-01-09 04:04:18,791 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 69 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-01-09 04:04:18,792 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 325 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-01-09 04:04:18,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2025-01-09 04:04:18,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 138. [2025-01-09 04:04:18,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 91 states have (on average 1.065934065934066) internal successors, (97), 92 states have internal predecessors, (97), 22 states have call successors, (22), 9 states have call predecessors, (22), 24 states have return successors, (121), 36 states have call predecessors, (121), 22 states have call successors, (121) [2025-01-09 04:04:18,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 240 transitions. [2025-01-09 04:04:18,816 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 240 transitions. Word has length 183 [2025-01-09 04:04:18,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:04:18,817 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 240 transitions. [2025-01-09 04:04:18,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 31 states have internal predecessors, (59), 6 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (23), 13 states have call predecessors, (23), 6 states have call successors, (23) [2025-01-09 04:04:18,817 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 240 transitions. [2025-01-09 04:04:18,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2025-01-09 04:04:18,819 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:04:18,819 INFO L218 NwaCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:04:18,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-01-09 04:04:19,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:04:19,019 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:04:19,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:04:19,020 INFO L85 PathProgramCache]: Analyzing trace with hash -860565711, now seen corresponding path program 9 times [2025-01-09 04:04:19,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:04:19,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614213969] [2025-01-09 04:04:19,021 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 04:04:19,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:04:19,032 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 170 statements into 18 equivalence classes. [2025-01-09 04:04:19,090 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) and asserted 161 of 170 statements. [2025-01-09 04:04:19,091 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2025-01-09 04:04:19,091 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:04:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 503 proven. 387 refuted. 0 times theorem prover too weak. 593 trivial. 0 not checked. [2025-01-09 04:04:19,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:04:19,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614213969] [2025-01-09 04:04:19,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614213969] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:04:19,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220062582] [2025-01-09 04:04:19,702 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 04:04:19,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:04:19,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:04:19,705 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) [2025-01-09 04:04:19,707 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 [2025-01-09 04:04:19,919 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 170 statements into 18 equivalence classes. [2025-01-09 04:04:19,982 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) and asserted 161 of 170 statements. [2025-01-09 04:04:19,982 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2025-01-09 04:04:19,982 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:04:19,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-01-09 04:04:19,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:04:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2025-01-09 04:04:20,088 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:04:23,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 525 proven. 384 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2025-01-09 04:04:23,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220062582] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:04:23,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:04:23,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 28] total 35 [2025-01-09 04:04:23,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087892250] [2025-01-09 04:04:23,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:04:23,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-01-09 04:04:23,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:04:23,722 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-01-09 04:04:23,723 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2025-01-09 04:04:23,723 INFO L87 Difference]: Start difference. First operand 138 states and 240 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 31 states have internal predecessors, (85), 17 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (35), 16 states have call predecessors, (35), 17 states have call successors, (35) [2025-01-09 04:04:24,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:04:24,493 INFO L93 Difference]: Finished difference Result 282 states and 570 transitions. [2025-01-09 04:04:24,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-01-09 04:04:24,494 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 31 states have internal predecessors, (85), 17 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (35), 16 states have call predecessors, (35), 17 states have call successors, (35) Word has length 170 [2025-01-09 04:04:24,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:04:24,495 INFO L225 Difference]: With dead ends: 282 [2025-01-09 04:04:24,495 INFO L226 Difference]: Without dead ends: 0 [2025-01-09 04:04:24,500 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 320 SyntacticMatches, 19 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1475 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=993, Invalid=3977, Unknown=0, NotChecked=0, Total=4970 [2025-01-09 04:04:24,502 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 118 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-09 04:04:24,502 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 211 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-09 04:04:24,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-01-09 04:04:24,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-01-09 04:04:24,503 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) [2025-01-09 04:04:24,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-01-09 04:04:24,504 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 170 [2025-01-09 04:04:24,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:04:24,504 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-01-09 04:04:24,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 31 states have internal predecessors, (85), 17 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (35), 16 states have call predecessors, (35), 17 states have call successors, (35) [2025-01-09 04:04:24,504 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-01-09 04:04:24,505 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-01-09 04:04:24,509 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-01-09 04:04:24,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-01-09 04:04:24,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:04:24,717 INFO L422 BasicCegarLoop]: Path program histogram: [9, 1, 1] [2025-01-09 04:04:24,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-01-09 04:04:32,445 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-01-09 04:04:32,449 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.01 04:04:32 BoogieIcfgContainer [2025-01-09 04:04:32,449 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-01-09 04:04:32,450 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-01-09 04:04:32,450 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-01-09 04:04:32,450 INFO L274 PluginConnector]: Witness Printer initialized [2025-01-09 04:04:32,450 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:03:47" (3/4) ... [2025-01-09 04:04:32,452 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-01-09 04:04:32,456 INFO L362 RCFGBacktranslator]: Ignoring RootEdge to procedure ackermann [2025-01-09 04:04:32,460 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2025-01-09 04:04:32,460 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2025-01-09 04:04:32,460 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-01-09 04:04:32,460 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-01-09 04:04:32,537 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-01-09 04:04:32,538 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.yml [2025-01-09 04:04:32,538 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-01-09 04:04:32,539 INFO L158 Benchmark]: Toolchain (without parser) took 45120.45ms. Allocated memory was 167.8MB in the beginning and 1.0GB in the end (delta: 880.8MB). Free memory was 133.2MB in the beginning and 548.1MB in the end (delta: -414.9MB). Peak memory consumption was 461.1MB. Max. memory is 16.1GB. [2025-01-09 04:04:32,539 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 201.3MB. Free memory is still 116.0MB. There was no memory consumed. Max. memory is 16.1GB. [2025-01-09 04:04:32,539 INFO L158 Benchmark]: CACSL2BoogieTranslator took 215.25ms. Allocated memory is still 167.8MB. Free memory was 133.2MB in the beginning and 122.6MB in the end (delta: 10.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-01-09 04:04:32,540 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.81ms. Allocated memory is still 167.8MB. Free memory was 122.6MB in the beginning and 121.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2025-01-09 04:04:32,540 INFO L158 Benchmark]: Boogie Preprocessor took 41.35ms. Allocated memory is still 167.8MB. Free memory was 121.2MB in the beginning and 120.3MB in the end (delta: 872.9kB). There was no memory consumed. Max. memory is 16.1GB. [2025-01-09 04:04:32,540 INFO L158 Benchmark]: RCFGBuilder took 280.75ms. Allocated memory is still 167.8MB. Free memory was 120.3MB in the beginning and 109.2MB in the end (delta: 11.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-01-09 04:04:32,540 INFO L158 Benchmark]: TraceAbstraction took 44460.78ms. Allocated memory was 167.8MB in the beginning and 1.0GB in the end (delta: 880.8MB). Free memory was 108.7MB in the beginning and 552.3MB in the end (delta: -443.7MB). Peak memory consumption was 608.6MB. Max. memory is 16.1GB. [2025-01-09 04:04:32,541 INFO L158 Benchmark]: Witness Printer took 88.06ms. Allocated memory is still 1.0GB. Free memory was 552.3MB in the beginning and 548.1MB in the end (delta: 4.2MB). There was no memory consumed. Max. memory is 16.1GB. [2025-01-09 04:04:32,542 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 201.3MB. Free memory is still 116.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 215.25ms. Allocated memory is still 167.8MB. Free memory was 133.2MB in the beginning and 122.6MB in the end (delta: 10.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.81ms. Allocated memory is still 167.8MB. Free memory was 122.6MB in the beginning and 121.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 41.35ms. Allocated memory is still 167.8MB. Free memory was 121.2MB in the beginning and 120.3MB in the end (delta: 872.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 280.75ms. Allocated memory is still 167.8MB. Free memory was 120.3MB in the beginning and 109.2MB in the end (delta: 11.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 44460.78ms. Allocated memory was 167.8MB in the beginning and 1.0GB in the end (delta: 880.8MB). Free memory was 108.7MB in the beginning and 552.3MB in the end (delta: -443.7MB). Peak memory consumption was 608.6MB. Max. memory is 16.1GB. * Witness Printer took 88.06ms. Allocated memory is still 1.0GB. Free memory was 552.3MB in the beginning and 548.1MB in the end (delta: 4.2MB). There was no memory consumed. 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: 45]: 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 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 36.7s, OverallIterations: 11, TraceHistogramMax: 31, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 6.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 584 SdHoareTripleChecker+Valid, 2.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 548 mSDsluCounter, 1834 SdHoareTripleChecker+Invalid, 2.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1545 mSDsCounter, 718 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4391 IncrementalHoareTripleChecker+Invalid, 5109 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 718 mSolverCounterUnsat, 289 mSDtfsCounter, 4391 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2881 GetRequests, 2367 SyntacticMatches, 91 SemanticMatches, 423 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6338 ImplicationChecksByTransitivity, 5.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=138occurred in iteration=10, InterpolantAutomatonStates: 274, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 11 MinimizatonAttempts, 287 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 26.2s InterpolantComputationTime, 2498 NumberOfCodeBlocks, 2154 NumberOfCodeBlocksAsserted, 101 NumberOfCheckSat, 3710 ConstructedInterpolants, 0 QuantifiedInterpolants, 6974 SizeOfPredicates, 36 NumberOfNonLiveVariables, 3267 ConjunctsInSsa, 213 ConjunctsInUnsatCore, 31 InterpolantComputations, 1 PerfectInterpolantSequences, 22427/28332 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 RESULT: Ultimate proved your program to be correct! [2025-01-09 04:04:32,563 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