./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/Mono4_1.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/loops-crafted-1/Mono4_1.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 72ad066471387bf5403e859503e1fde5318d51a6c677887f8013c98efb036f7e --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 03:01:16,499 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 03:01:16,573 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 03:01:16,577 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 03:01:16,584 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 03:01:16,603 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 03:01:16,603 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 03:01:16,603 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 03:01:16,604 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 03:01:16,604 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 03:01:16,604 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 03:01:16,604 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 03:01:16,604 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 03:01:16,604 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 03:01:16,604 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 03:01:16,605 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 03:01:16,605 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 03:01:16,605 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 03:01:16,605 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 03:01:16,605 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 03:01:16,605 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 03:01:16,605 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 03:01:16,605 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 03:01:16,605 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 03:01:16,605 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 03:01:16,605 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 03:01:16,605 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 03:01:16,606 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 03:01:16,606 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 03:01:16,606 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 03:01:16,606 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 03:01:16,606 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 03:01:16,606 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 03:01:16,606 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 03:01:16,606 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 03:01:16,606 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 03:01:16,606 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 03:01:16,606 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 03:01:16,606 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 03:01:16,607 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 03:01:16,607 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 03:01:16,607 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 03:01:16,607 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 03:01:16,607 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 03:01:16,607 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 03:01:16,607 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 03:01:16,607 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 03:01:16,607 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 03:01:16,607 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 -> 72ad066471387bf5403e859503e1fde5318d51a6c677887f8013c98efb036f7e [2025-01-09 03:01:16,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 03:01:16,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 03:01:16,859 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 03:01:16,861 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 03:01:16,861 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 03:01:16,863 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/Mono4_1.c [2025-01-09 03:01:18,289 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/826d13752/b268f0ae122f4518a885a9f7676d95e3/FLAG9544320d9 [2025-01-09 03:01:18,576 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 03:01:18,577 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono4_1.c [2025-01-09 03:01:18,584 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/826d13752/b268f0ae122f4518a885a9f7676d95e3/FLAG9544320d9 [2025-01-09 03:01:18,604 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/826d13752/b268f0ae122f4518a885a9f7676d95e3 [2025-01-09 03:01:18,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 03:01:18,608 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 03:01:18,610 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 03:01:18,610 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 03:01:18,613 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 03:01:18,614 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 03:01:18" (1/1) ... [2025-01-09 03:01:18,615 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f70081f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:18, skipping insertion in model container [2025-01-09 03:01:18,615 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 03:01:18" (1/1) ... [2025-01-09 03:01:18,625 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 03:01:18,746 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/loops-crafted-1/Mono4_1.c[311,324] [2025-01-09 03:01:18,754 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 03:01:18,764 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 03:01:18,772 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/loops-crafted-1/Mono4_1.c[311,324] [2025-01-09 03:01:18,775 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 03:01:18,787 INFO L204 MainTranslator]: Completed translation [2025-01-09 03:01:18,789 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:18 WrapperNode [2025-01-09 03:01:18,789 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 03:01:18,790 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 03:01:18,790 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 03:01:18,790 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 03:01:18,796 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:18" (1/1) ... [2025-01-09 03:01:18,801 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:18" (1/1) ... [2025-01-09 03:01:18,811 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 24 [2025-01-09 03:01:18,811 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 03:01:18,813 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 03:01:18,813 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 03:01:18,814 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 03:01:18,819 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:18" (1/1) ... [2025-01-09 03:01:18,819 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:18" (1/1) ... [2025-01-09 03:01:18,820 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:18" (1/1) ... [2025-01-09 03:01:18,826 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 03:01:18,826 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:18" (1/1) ... [2025-01-09 03:01:18,827 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:18" (1/1) ... [2025-01-09 03:01:18,828 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:18" (1/1) ... [2025-01-09 03:01:18,828 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:18" (1/1) ... [2025-01-09 03:01:18,830 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:18" (1/1) ... [2025-01-09 03:01:18,830 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:18" (1/1) ... [2025-01-09 03:01:18,831 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:18" (1/1) ... [2025-01-09 03:01:18,832 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 03:01:18,832 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 03:01:18,832 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 03:01:18,832 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 03:01:18,833 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:18" (1/1) ... [2025-01-09 03:01:18,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 03:01:18,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:01:18,866 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 03:01:18,870 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 03:01:18,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 03:01:18,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 03:01:18,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 03:01:18,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 03:01:18,932 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 03:01:18,933 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 03:01:19,013 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-01-09 03:01:19,013 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 03:01:19,029 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 03:01:19,033 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-09 03:01:19,033 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 03:01:19 BoogieIcfgContainer [2025-01-09 03:01:19,033 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 03:01:19,035 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 03:01:19,035 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 03:01:19,044 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 03:01:19,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 03:01:18" (1/3) ... [2025-01-09 03:01:19,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35e17205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 03:01:19, skipping insertion in model container [2025-01-09 03:01:19,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:18" (2/3) ... [2025-01-09 03:01:19,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35e17205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 03:01:19, skipping insertion in model container [2025-01-09 03:01:19,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 03:01:19" (3/3) ... [2025-01-09 03:01:19,050 INFO L128 eAbstractionObserver]: Analyzing ICFG Mono4_1.c [2025-01-09 03:01:19,078 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 03:01:19,080 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG Mono4_1.c that has 1 procedures, 11 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-01-09 03:01:19,164 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 03:01:19,177 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;@310c0942, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 03:01:19,178 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-09 03:01:19,182 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:01:19,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2025-01-09 03:01:19,186 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:01:19,187 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2025-01-09 03:01:19,187 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:01:19,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:01:19,195 INFO L85 PathProgramCache]: Analyzing trace with hash 28702733, now seen corresponding path program 1 times [2025-01-09 03:01:19,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:01:19,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738155388] [2025-01-09 03:01:19,202 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:01:19,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:01:19,266 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-01-09 03:01:19,283 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-01-09 03:01:19,284 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:01:19,285 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:19,381 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 03:01:19,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:01:19,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738155388] [2025-01-09 03:01:19,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738155388] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:01:19,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:01:19,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-09 03:01:19,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503219217] [2025-01-09 03:01:19,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:01:19,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-09 03:01:19,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:01:19,404 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-09 03:01:19,405 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 03:01:19,407 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:01:19,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:01:19,438 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2025-01-09 03:01:19,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 03:01:19,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2025-01-09 03:01:19,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:01:19,445 INFO L225 Difference]: With dead ends: 22 [2025-01-09 03:01:19,445 INFO L226 Difference]: Without dead ends: 9 [2025-01-09 03:01:19,447 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 03:01:19,449 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:01:19,450 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 16 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:01:19,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2025-01-09 03:01:19,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2025-01-09 03:01:19,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:01:19,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2025-01-09 03:01:19,471 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2025-01-09 03:01:19,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:01:19,472 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2025-01-09 03:01:19,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:01:19,472 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2025-01-09 03:01:19,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-01-09 03:01:19,472 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:01:19,472 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:01:19,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 03:01:19,473 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:01:19,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:01:19,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1805891882, now seen corresponding path program 1 times [2025-01-09 03:01:19,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:01:19,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091044114] [2025-01-09 03:01:19,474 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:01:19,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:01:19,479 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-01-09 03:01:19,483 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-01-09 03:01:19,483 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:01:19,483 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:19,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 03:01:19,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:01:19,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091044114] [2025-01-09 03:01:19,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091044114] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:01:19,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592421760] [2025-01-09 03:01:19,520 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:01:19,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:01:19,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:01:19,522 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 03:01:19,524 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 03:01:19,556 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-01-09 03:01:19,567 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-01-09 03:01:19,567 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:01:19,567 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:19,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-01-09 03:01:19,571 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:01:19,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 03:01:19,620 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:01:19,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 03:01:19,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592421760] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:01:19,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:01:19,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-01-09 03:01:19,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924068765] [2025-01-09 03:01:19,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:01:19,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-09 03:01:19,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:01:19,660 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-09 03:01:19,660 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-01-09 03:01:19,660 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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 03:01:19,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:01:19,701 INFO L93 Difference]: Finished difference Result 19 states and 26 transitions. [2025-01-09 03:01:19,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 03:01:19,702 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-01-09 03:01:19,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:01:19,703 INFO L225 Difference]: With dead ends: 19 [2025-01-09 03:01:19,703 INFO L226 Difference]: Without dead ends: 14 [2025-01-09 03:01:19,703 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-01-09 03:01:19,704 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:01:19,704 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 17 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:01:19,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2025-01-09 03:01:19,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2025-01-09 03:01:19,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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 03:01:19,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2025-01-09 03:01:19,710 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2025-01-09 03:01:19,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:01:19,710 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2025-01-09 03:01:19,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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 03:01:19,710 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2025-01-09 03:01:19,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-01-09 03:01:19,711 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:01:19,711 INFO L218 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1] [2025-01-09 03:01:19,724 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 03:01:19,912 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 03:01:19,912 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:01:19,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:01:19,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1983636221, now seen corresponding path program 1 times [2025-01-09 03:01:19,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:01:19,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703544965] [2025-01-09 03:01:19,914 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:01:19,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:01:19,920 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-01-09 03:01:19,927 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-01-09 03:01:19,928 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:01:19,928 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:19,978 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 03:01:19,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:01:19,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703544965] [2025-01-09 03:01:19,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703544965] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:01:19,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328176606] [2025-01-09 03:01:19,978 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:01:19,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:01:19,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:01:19,981 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 03:01:19,982 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 03:01:20,003 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-01-09 03:01:20,011 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-01-09 03:01:20,012 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:01:20,012 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:20,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-01-09 03:01:20,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:01:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 03:01:20,032 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:01:20,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 03:01:20,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328176606] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:01:20,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:01:20,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2025-01-09 03:01:20,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546062743] [2025-01-09 03:01:20,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:01:20,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-09 03:01:20,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:01:20,067 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-09 03:01:20,067 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-01-09 03:01:20,067 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 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 03:01:20,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:01:20,091 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2025-01-09 03:01:20,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-09 03:01:20,091 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2025-01-09 03:01:20,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:01:20,092 INFO L225 Difference]: With dead ends: 30 [2025-01-09 03:01:20,092 INFO L226 Difference]: Without dead ends: 22 [2025-01-09 03:01:20,092 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-01-09 03:01:20,092 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:01:20,093 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:01:20,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-01-09 03:01:20,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2025-01-09 03:01:20,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:01:20,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2025-01-09 03:01:20,096 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2025-01-09 03:01:20,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:01:20,096 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2025-01-09 03:01:20,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 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 03:01:20,097 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2025-01-09 03:01:20,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-01-09 03:01:20,097 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:01:20,097 INFO L218 NwaCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1] [2025-01-09 03:01:20,107 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 03:01:20,301 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 03:01:20,301 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:01:20,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:01:20,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1346437105, now seen corresponding path program 2 times [2025-01-09 03:01:20,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:01:20,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261682071] [2025-01-09 03:01:20,302 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:01:20,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:01:20,308 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-01-09 03:01:20,315 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 03:01:20,315 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:01:20,315 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-01-09 03:01:20,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:01:20,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261682071] [2025-01-09 03:01:20,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261682071] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:01:20,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081407707] [2025-01-09 03:01:20,524 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:01:20,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:01:20,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:01:20,531 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 03:01:20,533 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 03:01:20,554 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-01-09 03:01:20,564 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 03:01:20,565 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:01:20,565 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:20,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-09 03:01:20,567 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:01:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 03:01:20,653 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:01:20,778 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 03:01:20,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081407707] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:01:20,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:01:20,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 20 [2025-01-09 03:01:20,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652505338] [2025-01-09 03:01:20,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:01:20,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-01-09 03:01:20,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:01:20,780 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-01-09 03:01:20,782 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2025-01-09 03:01:20,782 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:01:20,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:01:20,996 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2025-01-09 03:01:20,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-01-09 03:01:20,997 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2025-01-09 03:01:20,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:01:20,997 INFO L225 Difference]: With dead ends: 56 [2025-01-09 03:01:20,997 INFO L226 Difference]: Without dead ends: 47 [2025-01-09 03:01:20,998 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=411, Invalid=711, Unknown=0, NotChecked=0, Total=1122 [2025-01-09 03:01:20,998 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:01:20,998 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 24 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:01:20,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2025-01-09 03:01:21,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2025-01-09 03:01:21,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:01:21,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2025-01-09 03:01:21,010 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 21 [2025-01-09 03:01:21,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:01:21,010 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2025-01-09 03:01:21,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:01:21,011 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2025-01-09 03:01:21,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-01-09 03:01:21,016 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:01:21,016 INFO L218 NwaCegarLoop]: trace histogram [17, 14, 3, 1, 1, 1, 1, 1] [2025-01-09 03:01:21,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-01-09 03:01:21,216 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 03:01:21,217 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:01:21,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:01:21,217 INFO L85 PathProgramCache]: Analyzing trace with hash -189463372, now seen corresponding path program 3 times [2025-01-09 03:01:21,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:01:21,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892766834] [2025-01-09 03:01:21,218 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:01:21,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:01:21,225 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 18 equivalence classes. [2025-01-09 03:01:21,229 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 15 of 39 statements. [2025-01-09 03:01:21,230 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-01-09 03:01:21,230 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2025-01-09 03:01:21,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:01:21,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892766834] [2025-01-09 03:01:21,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892766834] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:01:21,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769692540] [2025-01-09 03:01:21,363 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:01:21,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:01:21,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:01:21,367 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 03:01:21,368 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 03:01:21,397 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 18 equivalence classes. [2025-01-09 03:01:21,407 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 15 of 39 statements. [2025-01-09 03:01:21,407 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-01-09 03:01:21,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:21,408 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-01-09 03:01:21,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:01:21,540 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2025-01-09 03:01:21,540 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:01:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2025-01-09 03:01:21,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769692540] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:01:21,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:01:21,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2025-01-09 03:01:21,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991819184] [2025-01-09 03:01:21,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:01:21,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-09 03:01:21,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:01:21,666 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-09 03:01:21,666 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2025-01-09 03:01:21,667 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 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 03:01:21,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:01:21,702 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2025-01-09 03:01:21,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-09 03:01:21,702 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2025-01-09 03:01:21,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:01:21,703 INFO L225 Difference]: With dead ends: 74 [2025-01-09 03:01:21,703 INFO L226 Difference]: Without dead ends: 71 [2025-01-09 03:01:21,704 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2025-01-09 03:01:21,704 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:01:21,706 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 33 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:01:21,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2025-01-09 03:01:21,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 50. [2025-01-09 03:01:21,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:01:21,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2025-01-09 03:01:21,719 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 39 [2025-01-09 03:01:21,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:01:21,720 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2025-01-09 03:01:21,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 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 03:01:21,720 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2025-01-09 03:01:21,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-01-09 03:01:21,721 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:01:21,721 INFO L218 NwaCegarLoop]: trace histogram [22, 14, 8, 1, 1, 1, 1, 1] [2025-01-09 03:01:21,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-09 03:01:21,926 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 03:01:21,926 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:01:21,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:01:21,928 INFO L85 PathProgramCache]: Analyzing trace with hash 673342907, now seen corresponding path program 4 times [2025-01-09 03:01:21,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:01:21,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899502519] [2025-01-09 03:01:21,928 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 03:01:21,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:01:21,935 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 49 statements into 2 equivalence classes. [2025-01-09 03:01:21,944 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-01-09 03:01:21,944 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 03:01:21,944 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 225 proven. 210 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2025-01-09 03:01:22,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:01:22,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899502519] [2025-01-09 03:01:22,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899502519] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:01:22,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271866258] [2025-01-09 03:01:22,262 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 03:01:22,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:01:22,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:01:22,266 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 03:01:22,271 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 03:01:22,301 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 49 statements into 2 equivalence classes. [2025-01-09 03:01:22,322 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-01-09 03:01:22,322 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 03:01:22,322 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:22,324 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-01-09 03:01:22,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:01:22,397 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 225 proven. 210 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2025-01-09 03:01:22,398 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:01:22,838 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 225 proven. 210 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2025-01-09 03:01:22,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271866258] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:01:22,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:01:22,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2025-01-09 03:01:22,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788580706] [2025-01-09 03:01:22,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:01:22,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-01-09 03:01:22,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:01:22,841 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-01-09 03:01:22,841 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2025-01-09 03:01:22,842 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 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 03:01:22,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:01:22,963 INFO L93 Difference]: Finished difference Result 100 states and 131 transitions. [2025-01-09 03:01:22,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-01-09 03:01:22,964 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2025-01-09 03:01:22,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:01:22,964 INFO L225 Difference]: With dead ends: 100 [2025-01-09 03:01:22,964 INFO L226 Difference]: Without dead ends: 82 [2025-01-09 03:01:22,965 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2025-01-09 03:01:22,966 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:01:22,966 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:01:22,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-01-09 03:01:22,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2025-01-09 03:01:22,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1111111111111112) internal successors, (90), 81 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:01:22,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2025-01-09 03:01:22,983 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 49 [2025-01-09 03:01:22,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:01:22,984 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2025-01-09 03:01:22,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 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 03:01:22,984 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2025-01-09 03:01:22,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2025-01-09 03:01:22,987 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:01:22,987 INFO L218 NwaCegarLoop]: trace histogram [38, 30, 8, 1, 1, 1, 1, 1] [2025-01-09 03:01:22,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-01-09 03:01:23,187 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 03:01:23,189 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:01:23,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:01:23,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1026295413, now seen corresponding path program 5 times [2025-01-09 03:01:23,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:01:23,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684854786] [2025-01-09 03:01:23,190 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 03:01:23,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:01:23,201 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 81 statements into 39 equivalence classes. [2025-01-09 03:01:23,224 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) and asserted 81 of 81 statements. [2025-01-09 03:01:23,224 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2025-01-09 03:01:23,224 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 510 proven. 64 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2025-01-09 03:01:23,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:01:23,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684854786] [2025-01-09 03:01:23,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684854786] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:01:23,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077571981] [2025-01-09 03:01:23,401 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 03:01:23,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:01:23,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:01:23,406 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 03:01:23,408 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 03:01:23,444 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 81 statements into 39 equivalence classes. [2025-01-09 03:01:23,481 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) and asserted 81 of 81 statements. [2025-01-09 03:01:23,481 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2025-01-09 03:01:23,482 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:23,483 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-01-09 03:01:23,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:01:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 465 proven. 930 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2025-01-09 03:01:24,089 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:01:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 465 proven. 930 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2025-01-09 03:01:25,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077571981] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:01:25,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:01:25,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 33, 33] total 73 [2025-01-09 03:01:25,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201741229] [2025-01-09 03:01:25,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:01:25,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2025-01-09 03:01:25,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:01:25,620 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2025-01-09 03:01:25,623 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2025-01-09 03:01:25,623 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 73 states, 73 states have (on average 2.095890410958904) internal successors, (153), 73 states have internal predecessors, (153), 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 03:01:25,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:01:25,872 INFO L93 Difference]: Finished difference Result 227 states and 310 transitions. [2025-01-09 03:01:25,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2025-01-09 03:01:25,873 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.095890410958904) internal successors, (153), 73 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2025-01-09 03:01:25,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:01:25,875 INFO L225 Difference]: With dead ends: 227 [2025-01-09 03:01:25,875 INFO L226 Difference]: Without dead ends: 209 [2025-01-09 03:01:25,878 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2025-01-09 03:01:25,879 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 03:01:25,879 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 17 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 03:01:25,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2025-01-09 03:01:25,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 148. [2025-01-09 03:01:25,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0680272108843538) internal successors, (157), 147 states have internal predecessors, (157), 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 03:01:25,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 157 transitions. [2025-01-09 03:01:25,897 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 157 transitions. Word has length 81 [2025-01-09 03:01:25,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:01:25,897 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 157 transitions. [2025-01-09 03:01:25,897 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.095890410958904) internal successors, (153), 73 states have internal predecessors, (153), 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 03:01:25,898 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 157 transitions. [2025-01-09 03:01:25,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2025-01-09 03:01:25,899 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:01:25,899 INFO L218 NwaCegarLoop]: trace histogram [71, 62, 9, 1, 1, 1, 1, 1] [2025-01-09 03:01:25,907 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 03:01:26,103 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 03:01:26,103 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:01:26,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:01:26,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1671838598, now seen corresponding path program 6 times [2025-01-09 03:01:26,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:01:26,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774400610] [2025-01-09 03:01:26,104 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 03:01:26,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:01:26,123 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 147 statements into 72 equivalence classes. [2025-01-09 03:01:26,161 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) and asserted 73 of 147 statements. [2025-01-09 03:01:26,161 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2025-01-09 03:01:26,161 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:26,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 1135 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2025-01-09 03:01:26,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:01:26,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774400610] [2025-01-09 03:01:26,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774400610] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:01:26,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008301796] [2025-01-09 03:01:26,402 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 03:01:26,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:01:26,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:01:26,405 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 03:01:26,406 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 03:01:26,454 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 147 statements into 72 equivalence classes. [2025-01-09 03:01:26,487 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) and asserted 73 of 147 statements. [2025-01-09 03:01:26,488 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2025-01-09 03:01:26,488 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:26,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-01-09 03:01:26,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:01:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 1135 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2025-01-09 03:01:26,701 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:01:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 1135 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2025-01-09 03:01:27,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008301796] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:01:27,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:01:27,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-01-09 03:01:27,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343623629] [2025-01-09 03:01:27,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:01:27,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-01-09 03:01:27,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:01:27,081 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-01-09 03:01:27,081 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=352, Unknown=0, NotChecked=0, Total=600 [2025-01-09 03:01:27,081 INFO L87 Difference]: Start difference. First operand 148 states and 157 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 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 03:01:27,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:01:27,467 INFO L93 Difference]: Finished difference Result 450 states and 613 transitions. [2025-01-09 03:01:27,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-01-09 03:01:27,467 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2025-01-09 03:01:27,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:01:27,470 INFO L225 Difference]: With dead ends: 450 [2025-01-09 03:01:27,472 INFO L226 Difference]: Without dead ends: 447 [2025-01-09 03:01:27,473 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=478, Invalid=712, Unknown=0, NotChecked=0, Total=1190 [2025-01-09 03:01:27,474 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 62 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:01:27,474 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 57 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:01:27,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2025-01-09 03:01:27,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 170. [2025-01-09 03:01:27,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.1242603550295858) internal successors, (190), 169 states have internal predecessors, (190), 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 03:01:27,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 190 transitions. [2025-01-09 03:01:27,513 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 190 transitions. Word has length 147 [2025-01-09 03:01:27,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:01:27,513 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 190 transitions. [2025-01-09 03:01:27,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 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 03:01:27,514 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 190 transitions. [2025-01-09 03:01:27,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2025-01-09 03:01:27,517 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:01:27,517 INFO L218 NwaCegarLoop]: trace histogram [82, 62, 20, 1, 1, 1, 1, 1] [2025-01-09 03:01:27,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-01-09 03:01:27,722 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 03:01:27,722 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:01:27,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:01:27,723 INFO L85 PathProgramCache]: Analyzing trace with hash -757475345, now seen corresponding path program 7 times [2025-01-09 03:01:27,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:01:27,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404554499] [2025-01-09 03:01:27,724 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 03:01:27,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:01:27,733 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 169 statements into 1 equivalence classes. [2025-01-09 03:01:27,769 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 169 of 169 statements. [2025-01-09 03:01:27,770 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:01:27,770 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:30,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 2457 proven. 3906 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2025-01-09 03:01:30,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:01:30,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404554499] [2025-01-09 03:01:30,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404554499] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:01:30,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906619136] [2025-01-09 03:01:30,394 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 03:01:30,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:01:30,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:01:30,397 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 03:01:30,398 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 03:01:30,431 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 169 statements into 1 equivalence classes. [2025-01-09 03:01:30,482 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 169 of 169 statements. [2025-01-09 03:01:30,482 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:01:30,482 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:30,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 64 conjuncts are in the unsatisfiable core [2025-01-09 03:01:30,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:01:30,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 2457 proven. 3906 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2025-01-09 03:01:30,698 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:01:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 2457 proven. 3906 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2025-01-09 03:01:35,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906619136] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:01:35,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:01:35,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 129 [2025-01-09 03:01:35,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829792260] [2025-01-09 03:01:35,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:01:35,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2025-01-09 03:01:35,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:01:35,777 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2025-01-09 03:01:35,781 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2025-01-09 03:01:35,781 INFO L87 Difference]: Start difference. First operand 170 states and 190 transitions. Second operand has 129 states, 129 states have (on average 2.0387596899224807) internal successors, (263), 129 states have internal predecessors, (263), 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 03:01:36,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:01:36,183 INFO L93 Difference]: Finished difference Result 340 states and 443 transitions. [2025-01-09 03:01:36,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2025-01-09 03:01:36,184 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.0387596899224807) internal successors, (263), 129 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2025-01-09 03:01:36,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:01:36,186 INFO L225 Difference]: With dead ends: 340 [2025-01-09 03:01:36,186 INFO L226 Difference]: Without dead ends: 298 [2025-01-09 03:01:36,190 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2025-01-09 03:01:36,190 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-09 03:01:36,191 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-09 03:01:36,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2025-01-09 03:01:36,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2025-01-09 03:01:36,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 1.0707070707070707) internal successors, (318), 297 states have internal predecessors, (318), 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 03:01:36,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 318 transitions. [2025-01-09 03:01:36,220 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 318 transitions. Word has length 169 [2025-01-09 03:01:36,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:01:36,220 INFO L471 AbstractCegarLoop]: Abstraction has 298 states and 318 transitions. [2025-01-09 03:01:36,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.0387596899224807) internal successors, (263), 129 states have internal predecessors, (263), 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 03:01:36,221 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 318 transitions. [2025-01-09 03:01:36,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2025-01-09 03:01:36,223 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:01:36,224 INFO L218 NwaCegarLoop]: trace histogram [146, 126, 20, 1, 1, 1, 1, 1] [2025-01-09 03:01:36,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-01-09 03:01:36,427 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 03:01:36,428 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:01:36,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:01:36,429 INFO L85 PathProgramCache]: Analyzing trace with hash -46405841, now seen corresponding path program 8 times [2025-01-09 03:01:36,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:01:36,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246321533] [2025-01-09 03:01:36,429 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:01:36,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:01:36,439 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 297 statements into 2 equivalence classes. [2025-01-09 03:01:36,508 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 297 of 297 statements. [2025-01-09 03:01:36,508 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:01:36,508 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:44,766 INFO L134 CoverageAnalysis]: Checked inductivity of 21316 backedges. 4953 proven. 16002 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2025-01-09 03:01:44,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:01:44,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246321533] [2025-01-09 03:01:44,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246321533] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:01:44,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588968814] [2025-01-09 03:01:44,767 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:01:44,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:01:44,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:01:44,768 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 03:01:44,770 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 03:01:44,810 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 297 statements into 2 equivalence classes. [2025-01-09 03:01:44,858 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 297 of 297 statements. [2025-01-09 03:01:44,859 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:01:44,859 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:44,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 128 conjuncts are in the unsatisfiable core [2025-01-09 03:01:44,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:01:45,125 INFO L134 CoverageAnalysis]: Checked inductivity of 21316 backedges. 4953 proven. 16002 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2025-01-09 03:01:45,128 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:01:59,973 INFO L134 CoverageAnalysis]: Checked inductivity of 21316 backedges. 4953 proven. 16002 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2025-01-09 03:01:59,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588968814] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:01:59,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:01:59,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129, 129] total 257 [2025-01-09 03:01:59,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009824606] [2025-01-09 03:01:59,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:01:59,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 257 states [2025-01-09 03:01:59,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:01:59,990 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 257 interpolants. [2025-01-09 03:01:59,999 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32896, Invalid=32896, Unknown=0, NotChecked=0, Total=65792 [2025-01-09 03:02:00,003 INFO L87 Difference]: Start difference. First operand 298 states and 318 transitions. Second operand has 257 states, 257 states have (on average 2.019455252918288) internal successors, (519), 257 states have internal predecessors, (519), 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 03:02:01,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:02:01,425 INFO L93 Difference]: Finished difference Result 596 states and 763 transitions. [2025-01-09 03:02:01,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2025-01-09 03:02:01,426 INFO L78 Accepts]: Start accepts. Automaton has has 257 states, 257 states have (on average 2.019455252918288) internal successors, (519), 257 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 297 [2025-01-09 03:02:01,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:02:01,429 INFO L225 Difference]: With dead ends: 596 [2025-01-09 03:02:01,429 INFO L226 Difference]: Without dead ends: 554 [2025-01-09 03:02:01,433 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 721 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=32896, Invalid=32896, Unknown=0, NotChecked=0, Total=65792 [2025-01-09 03:02:01,434 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-01-09 03:02:01,434 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-01-09 03:02:01,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2025-01-09 03:02:01,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2025-01-09 03:02:01,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 1.0379746835443038) internal successors, (574), 553 states have internal predecessors, (574), 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 03:02:01,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 574 transitions. [2025-01-09 03:02:01,508 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 574 transitions. Word has length 297 [2025-01-09 03:02:01,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:02:01,509 INFO L471 AbstractCegarLoop]: Abstraction has 554 states and 574 transitions. [2025-01-09 03:02:01,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 257 states, 257 states have (on average 2.019455252918288) internal successors, (519), 257 states have internal predecessors, (519), 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 03:02:01,510 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 574 transitions. [2025-01-09 03:02:01,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2025-01-09 03:02:01,517 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:02:01,518 INFO L218 NwaCegarLoop]: trace histogram [274, 254, 20, 1, 1, 1, 1, 1] [2025-01-09 03:02:01,528 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 03:02:01,718 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 03:02:01,718 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:02:01,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:02:01,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1855715921, now seen corresponding path program 9 times [2025-01-09 03:02:01,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:02:01,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753494489] [2025-01-09 03:02:01,719 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:02:01,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:02:01,746 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 553 statements into 275 equivalence classes. [2025-01-09 03:02:01,769 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) and asserted 83 of 553 statements. [2025-01-09 03:02:01,769 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2025-01-09 03:02:01,769 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:02:02,019 INFO L134 CoverageAnalysis]: Checked inductivity of 75076 backedges. 0 proven. 10306 refuted. 0 times theorem prover too weak. 64770 trivial. 0 not checked. [2025-01-09 03:02:02,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:02:02,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753494489] [2025-01-09 03:02:02,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753494489] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:02:02,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580173993] [2025-01-09 03:02:02,019 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:02:02,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:02:02,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:02:02,022 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 03:02:02,023 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 03:02:02,065 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 553 statements into 275 equivalence classes. [2025-01-09 03:02:02,096 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) and asserted 83 of 553 statements. [2025-01-09 03:02:02,096 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2025-01-09 03:02:02,096 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:02:02,097 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-01-09 03:02:02,101 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:02:02,563 INFO L134 CoverageAnalysis]: Checked inductivity of 75076 backedges. 0 proven. 10306 refuted. 0 times theorem prover too weak. 64770 trivial. 0 not checked. [2025-01-09 03:02:02,564 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:02:03,459 INFO L134 CoverageAnalysis]: Checked inductivity of 75076 backedges. 0 proven. 10306 refuted. 0 times theorem prover too weak. 64770 trivial. 0 not checked. [2025-01-09 03:02:03,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580173993] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:02:03,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:02:03,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2025-01-09 03:02:03,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910059216] [2025-01-09 03:02:03,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:02:03,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-01-09 03:02:03,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:02:03,461 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-01-09 03:02:03,461 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=974, Invalid=1188, Unknown=0, NotChecked=0, Total=2162 [2025-01-09 03:02:03,461 INFO L87 Difference]: Start difference. First operand 554 states and 574 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 47 states have internal predecessors, (92), 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 03:02:04,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:02:04,196 INFO L93 Difference]: Finished difference Result 1065 states and 1349 transitions. [2025-01-09 03:02:04,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2025-01-09 03:02:04,197 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 553 [2025-01-09 03:02:04,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:02:04,202 INFO L225 Difference]: With dead ends: 1065 [2025-01-09 03:02:04,203 INFO L226 Difference]: Without dead ends: 1062 [2025-01-09 03:02:04,204 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1149 GetRequests, 1083 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1919, Invalid=2637, Unknown=0, NotChecked=0, Total=4556 [2025-01-09 03:02:04,205 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 126 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:02:04,205 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 112 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:02:04,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2025-01-09 03:02:04,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 598. [2025-01-09 03:02:04,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 1.0720268006700167) internal successors, (640), 597 states have internal predecessors, (640), 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 03:02:04,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 640 transitions. [2025-01-09 03:02:04,258 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 640 transitions. Word has length 553 [2025-01-09 03:02:04,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:02:04,258 INFO L471 AbstractCegarLoop]: Abstraction has 598 states and 640 transitions. [2025-01-09 03:02:04,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 47 states have internal predecessors, (92), 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 03:02:04,259 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 640 transitions. [2025-01-09 03:02:04,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 598 [2025-01-09 03:02:04,265 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:02:04,265 INFO L218 NwaCegarLoop]: trace histogram [296, 254, 42, 1, 1, 1, 1, 1] [2025-01-09 03:02:04,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-01-09 03:02:04,469 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 03:02:04,469 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:02:04,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:02:04,470 INFO L85 PathProgramCache]: Analyzing trace with hash 352206913, now seen corresponding path program 10 times [2025-01-09 03:02:04,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:02:04,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015014209] [2025-01-09 03:02:04,470 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 03:02:04,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:02:04,481 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 597 statements into 2 equivalence classes. [2025-01-09 03:02:04,644 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 597 of 597 statements. [2025-01-09 03:02:04,644 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 03:02:04,644 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:02:37,018 INFO L134 CoverageAnalysis]: Checked inductivity of 87616 backedges. 21165 proven. 64770 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2025-01-09 03:02:37,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:02:37,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015014209] [2025-01-09 03:02:37,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015014209] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:02:37,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461346649] [2025-01-09 03:02:37,018 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 03:02:37,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:02:37,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:02:37,021 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:02:37,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-01-09 03:02:37,089 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 597 statements into 2 equivalence classes. [2025-01-09 03:02:37,191 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 597 of 597 statements. [2025-01-09 03:02:37,192 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 03:02:37,192 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:02:37,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 1301 conjuncts, 256 conjuncts are in the unsatisfiable core [2025-01-09 03:02:37,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:02:37,766 INFO L134 CoverageAnalysis]: Checked inductivity of 87616 backedges. 21165 proven. 64770 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2025-01-09 03:02:37,766 INFO L312 TraceCheckSpWp]: Computing backward predicates...