./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de61.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/in-de61.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 49b7efdcf8f4d6c873493bd370328870547a88b20d287c5de5342268b0966917 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 14:54:26,440 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 14:54:26,498 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 14:54:26,506 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 14:54:26,509 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 14:54:26,534 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 14:54:26,536 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 14:54:26,536 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 14:54:26,536 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 14:54:26,536 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 14:54:26,537 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 14:54:26,537 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 14:54:26,537 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 14:54:26,537 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 14:54:26,538 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 14:54:26,538 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 14:54:26,538 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 14:54:26,538 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 14:54:26,538 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 14:54:26,539 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 14:54:26,539 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 14:54:26,539 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 14:54:26,539 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 14:54:26,539 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 14:54:26,539 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 14:54:26,539 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 14:54:26,539 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 14:54:26,539 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 14:54:26,539 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 14:54:26,539 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 14:54:26,540 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 14:54:26,540 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 14:54:26,540 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 14:54:26,540 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 14:54:26,540 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 14:54:26,540 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 14:54:26,541 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 14:54:26,541 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 14:54:26,541 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 14:54:26,541 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 14:54:26,541 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 14:54:26,541 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 14:54:26,541 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 14:54:26,541 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 -> 49b7efdcf8f4d6c873493bd370328870547a88b20d287c5de5342268b0966917 [2025-02-05 14:54:26,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 14:54:26,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 14:54:26,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 14:54:26,787 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 14:54:26,787 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 14:54:26,789 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de61.c [2025-02-05 14:54:27,926 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/7f0abf145/e6e467456c7b4dcd8ee129009d2019b9/FLAG36774f46d [2025-02-05 14:54:28,147 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 14:54:28,148 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de61.c [2025-02-05 14:54:28,154 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/7f0abf145/e6e467456c7b4dcd8ee129009d2019b9/FLAG36774f46d [2025-02-05 14:54:28,497 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/7f0abf145/e6e467456c7b4dcd8ee129009d2019b9 [2025-02-05 14:54:28,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 14:54:28,500 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 14:54:28,501 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 14:54:28,501 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 14:54:28,504 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 14:54:28,504 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 02:54:28" (1/1) ... [2025-02-05 14:54:28,504 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@216599d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:54:28, skipping insertion in model container [2025-02-05 14:54:28,505 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 02:54:28" (1/1) ... [2025-02-05 14:54:28,512 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 14:54:28,595 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/in-de61.c[368,381] [2025-02-05 14:54:28,606 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 14:54:28,613 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 14:54:28,620 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/in-de61.c[368,381] [2025-02-05 14:54:28,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 14:54:28,632 INFO L204 MainTranslator]: Completed translation [2025-02-05 14:54:28,633 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:54:28 WrapperNode [2025-02-05 14:54:28,633 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 14:54:28,634 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 14:54:28,634 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 14:54:28,634 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 14:54:28,637 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:54:28" (1/1) ... [2025-02-05 14:54:28,641 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:54:28" (1/1) ... [2025-02-05 14:54:28,649 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2025-02-05 14:54:28,650 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 14:54:28,650 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 14:54:28,650 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 14:54:28,650 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 14:54:28,654 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:54:28" (1/1) ... [2025-02-05 14:54:28,654 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:54:28" (1/1) ... [2025-02-05 14:54:28,655 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:54:28" (1/1) ... [2025-02-05 14:54:28,660 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-05 14:54:28,660 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:54:28" (1/1) ... [2025-02-05 14:54:28,661 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:54:28" (1/1) ... [2025-02-05 14:54:28,662 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:54:28" (1/1) ... [2025-02-05 14:54:28,662 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:54:28" (1/1) ... [2025-02-05 14:54:28,663 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:54:28" (1/1) ... [2025-02-05 14:54:28,663 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:54:28" (1/1) ... [2025-02-05 14:54:28,664 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 14:54:28,664 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 14:54:28,664 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 14:54:28,664 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 14:54:28,665 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:54:28" (1/1) ... [2025-02-05 14:54:28,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 14:54:28,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:28,685 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-05 14:54:28,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-05 14:54:28,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 14:54:28,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 14:54:28,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 14:54:28,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 14:54:28,737 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 14:54:28,738 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 14:54:28,825 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2025-02-05 14:54:28,829 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 14:54:28,834 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 14:54:28,834 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 14:54:28,836 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 02:54:28 BoogieIcfgContainer [2025-02-05 14:54:28,836 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 14:54:28,837 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 14:54:28,838 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 14:54:28,840 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 14:54:28,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 02:54:28" (1/3) ... [2025-02-05 14:54:28,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a8b433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 02:54:28, skipping insertion in model container [2025-02-05 14:54:28,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:54:28" (2/3) ... [2025-02-05 14:54:28,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a8b433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 02:54:28, skipping insertion in model container [2025-02-05 14:54:28,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 02:54:28" (3/3) ... [2025-02-05 14:54:28,842 INFO L128 eAbstractionObserver]: Analyzing ICFG in-de61.c [2025-02-05 14:54:28,854 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 14:54:28,855 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG in-de61.c that has 1 procedures, 15 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2025-02-05 14:54:28,892 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 14:54:28,900 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;@2e0428b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 14:54:28,900 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 14:54:28,904 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:28,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-02-05 14:54:28,908 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:28,908 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:54:28,909 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:28,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:28,912 INFO L85 PathProgramCache]: Analyzing trace with hash 532135705, now seen corresponding path program 1 times [2025-02-05 14:54:28,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:28,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009540457] [2025-02-05 14:54:28,918 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:54:28,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:28,967 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-05 14:54:28,996 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-05 14:54:28,998 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:54:28,998 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:54:29,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:29,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009540457] [2025-02-05 14:54:29,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009540457] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:54:29,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 14:54:29,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-05 14:54:29,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925416443] [2025-02-05 14:54:29,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:54:29,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-05 14:54:29,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:29,399 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-05 14:54:29,400 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-05 14:54:29,401 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 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 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) [2025-02-05 14:54:29,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:29,513 INFO L93 Difference]: Finished difference Result 34 states and 52 transitions. [2025-02-05 14:54:29,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 14:54:29,515 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) Word has length 10 [2025-02-05 14:54:29,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:29,519 INFO L225 Difference]: With dead ends: 34 [2025-02-05 14:54:29,519 INFO L226 Difference]: Without dead ends: 12 [2025-02-05 14:54:29,521 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-02-05 14:54:29,522 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:29,523 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 37 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:54:29,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2025-02-05 14:54:29,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2025-02-05 14:54:29,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:29,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2025-02-05 14:54:29,545 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 10 [2025-02-05 14:54:29,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:29,545 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2025-02-05 14:54:29,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) [2025-02-05 14:54:29,545 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2025-02-05 14:54:29,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-02-05 14:54:29,545 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:29,545 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:54:29,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 14:54:29,546 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:29,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:29,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1085897580, now seen corresponding path program 1 times [2025-02-05 14:54:29,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:29,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495032194] [2025-02-05 14:54:29,546 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:54:29,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:29,559 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-05 14:54:29,567 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-05 14:54:29,567 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:54:29,567 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:29,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:54:29,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:29,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495032194] [2025-02-05 14:54:29,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495032194] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:29,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442982867] [2025-02-05 14:54:29,682 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:54:29,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:29,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:29,686 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:54:29,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-05 14:54:29,718 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-05 14:54:29,727 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-05 14:54:29,727 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:54:29,727 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:29,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-05 14:54:29,732 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:54:29,760 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:29,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:54:29,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442982867] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:29,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:29,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2025-02-05 14:54:29,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980042672] [2025-02-05 14:54:29,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:29,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-05 14:54:29,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:29,812 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-05 14:54:29,812 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2025-02-05 14:54:29,813 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:29,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:29,985 INFO L93 Difference]: Finished difference Result 48 states and 85 transitions. [2025-02-05 14:54:29,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 14:54:29,986 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-02-05 14:54:29,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:29,987 INFO L225 Difference]: With dead ends: 48 [2025-02-05 14:54:29,987 INFO L226 Difference]: Without dead ends: 41 [2025-02-05 14:54:29,988 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2025-02-05 14:54:29,988 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:29,988 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 58 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:54:29,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-02-05 14:54:29,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2025-02-05 14:54:29,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:29,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 51 transitions. [2025-02-05 14:54:29,994 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 51 transitions. Word has length 11 [2025-02-05 14:54:29,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:29,994 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 51 transitions. [2025-02-05 14:54:29,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:29,994 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 51 transitions. [2025-02-05 14:54:29,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-02-05 14:54:29,994 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:29,994 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:54:30,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-05 14:54:30,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:30,195 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:30,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:30,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1875419208, now seen corresponding path program 1 times [2025-02-05 14:54:30,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:30,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723678449] [2025-02-05 14:54:30,196 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:54:30,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:30,200 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-05 14:54:30,204 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-05 14:54:30,204 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:54:30,204 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:30,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:54:30,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:30,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723678449] [2025-02-05 14:54:30,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723678449] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:30,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133541473] [2025-02-05 14:54:30,271 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:54:30,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:30,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:30,277 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:54:30,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-05 14:54:30,296 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-05 14:54:30,303 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-05 14:54:30,303 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:54:30,303 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:30,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-05 14:54:30,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:30,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:54:30,331 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:30,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:54:30,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133541473] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:30,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:30,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 9 [2025-02-05 14:54:30,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274488177] [2025-02-05 14:54:30,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:30,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-05 14:54:30,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:30,358 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-05 14:54:30,358 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2025-02-05 14:54:30,359 INFO L87 Difference]: Start difference. First operand 33 states and 51 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:30,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:30,555 INFO L93 Difference]: Finished difference Result 84 states and 132 transitions. [2025-02-05 14:54:30,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-05 14:54:30,556 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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 [2025-02-05 14:54:30,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:30,556 INFO L225 Difference]: With dead ends: 84 [2025-02-05 14:54:30,556 INFO L226 Difference]: Without dead ends: 65 [2025-02-05 14:54:30,557 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2025-02-05 14:54:30,557 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 32 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:30,557 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 64 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:54:30,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2025-02-05 14:54:30,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2025-02-05 14:54:30,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 44 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:30,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 65 transitions. [2025-02-05 14:54:30,565 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 65 transitions. Word has length 13 [2025-02-05 14:54:30,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:30,565 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 65 transitions. [2025-02-05 14:54:30,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:30,566 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 65 transitions. [2025-02-05 14:54:30,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-02-05 14:54:30,566 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:30,566 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:54:30,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-05 14:54:30,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:30,770 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:30,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:30,771 INFO L85 PathProgramCache]: Analyzing trace with hash 812497881, now seen corresponding path program 2 times [2025-02-05 14:54:30,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:30,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906386485] [2025-02-05 14:54:30,771 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:54:30,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:30,778 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-02-05 14:54:30,784 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-02-05 14:54:30,785 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:54:30,785 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:30,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:54:30,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:30,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906386485] [2025-02-05 14:54:30,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906386485] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:30,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47992311] [2025-02-05 14:54:30,869 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:54:30,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:30,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:30,870 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:54:30,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-05 14:54:30,891 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-02-05 14:54:30,900 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-02-05 14:54:30,900 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:54:30,901 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:30,904 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-05 14:54:30,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:30,924 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:54:30,925 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:31,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:54:31,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47992311] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:31,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:31,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2025-02-05 14:54:31,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542540735] [2025-02-05 14:54:31,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:31,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-05 14:54:31,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:31,026 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-05 14:54:31,026 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2025-02-05 14:54:31,026 INFO L87 Difference]: Start difference. First operand 45 states and 65 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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) [2025-02-05 14:54:31,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:31,589 INFO L93 Difference]: Finished difference Result 172 states and 292 transitions. [2025-02-05 14:54:31,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-02-05 14:54:31,590 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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 14 [2025-02-05 14:54:31,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:31,591 INFO L225 Difference]: With dead ends: 172 [2025-02-05 14:54:31,591 INFO L226 Difference]: Without dead ends: 159 [2025-02-05 14:54:31,592 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=690, Unknown=0, NotChecked=0, Total=992 [2025-02-05 14:54:31,592 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 239 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:31,592 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 137 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 14:54:31,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2025-02-05 14:54:31,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 99. [2025-02-05 14:54:31,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.530612244897959) internal successors, (150), 98 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:31,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 150 transitions. [2025-02-05 14:54:31,610 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 150 transitions. Word has length 14 [2025-02-05 14:54:31,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:31,610 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 150 transitions. [2025-02-05 14:54:31,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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) [2025-02-05 14:54:31,611 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 150 transitions. [2025-02-05 14:54:31,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-02-05 14:54:31,611 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:31,611 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:54:31,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-05 14:54:31,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:31,812 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:31,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:31,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1773239137, now seen corresponding path program 1 times [2025-02-05 14:54:31,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:31,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770658469] [2025-02-05 14:54:31,813 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:54:31,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:31,816 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-05 14:54:31,827 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-05 14:54:31,827 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:54:31,827 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:54:32,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:32,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770658469] [2025-02-05 14:54:32,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770658469] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:32,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822910419] [2025-02-05 14:54:32,105 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:54:32,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:32,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:32,107 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:54:32,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-05 14:54:32,129 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-05 14:54:32,140 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-05 14:54:32,140 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:54:32,140 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:32,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-02-05 14:54:32,145 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:54:32,320 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:32,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:54:32,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822910419] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:32,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:32,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 21 [2025-02-05 14:54:32,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065669096] [2025-02-05 14:54:32,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:32,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-05 14:54:32,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:32,516 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-05 14:54:32,517 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2025-02-05 14:54:32,517 INFO L87 Difference]: Start difference. First operand 99 states and 150 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:33,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:33,150 INFO L93 Difference]: Finished difference Result 140 states and 204 transitions. [2025-02-05 14:54:33,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-05 14:54:33,151 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 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 16 [2025-02-05 14:54:33,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:33,151 INFO L225 Difference]: With dead ends: 140 [2025-02-05 14:54:33,152 INFO L226 Difference]: Without dead ends: 99 [2025-02-05 14:54:33,153 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=755, Unknown=0, NotChecked=0, Total=930 [2025-02-05 14:54:33,154 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 44 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:33,155 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 72 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 14:54:33,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2025-02-05 14:54:33,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 78. [2025-02-05 14:54:33,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.5974025974025974) internal successors, (123), 77 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:33,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 123 transitions. [2025-02-05 14:54:33,175 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 123 transitions. Word has length 16 [2025-02-05 14:54:33,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:33,175 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 123 transitions. [2025-02-05 14:54:33,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:33,176 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 123 transitions. [2025-02-05 14:54:33,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-02-05 14:54:33,176 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:33,176 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:54:33,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-05 14:54:33,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:33,381 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:33,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:33,382 INFO L85 PathProgramCache]: Analyzing trace with hash -249773575, now seen corresponding path program 2 times [2025-02-05 14:54:33,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:33,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942036741] [2025-02-05 14:54:33,382 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:54:33,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:33,388 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-02-05 14:54:33,395 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-05 14:54:33,397 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:54:33,397 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:33,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:54:33,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:33,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942036741] [2025-02-05 14:54:33,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942036741] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:33,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269581329] [2025-02-05 14:54:33,532 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:54:33,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:33,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:33,538 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:54:33,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-05 14:54:33,559 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-02-05 14:54:33,567 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-05 14:54:33,567 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:54:33,567 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:33,567 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-05 14:54:33,568 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:33,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 14:54:33,645 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:33,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 14:54:33,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269581329] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:33,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:33,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 13 [2025-02-05 14:54:33,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173004135] [2025-02-05 14:54:33,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:33,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-05 14:54:33,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:33,715 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-05 14:54:33,715 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2025-02-05 14:54:33,715 INFO L87 Difference]: Start difference. First operand 78 states and 123 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:34,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:34,477 INFO L93 Difference]: Finished difference Result 215 states and 332 transitions. [2025-02-05 14:54:34,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-02-05 14:54:34,478 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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 16 [2025-02-05 14:54:34,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:34,480 INFO L225 Difference]: With dead ends: 215 [2025-02-05 14:54:34,481 INFO L226 Difference]: Without dead ends: 179 [2025-02-05 14:54:34,481 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2025-02-05 14:54:34,483 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 79 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:34,484 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 103 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-05 14:54:34,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2025-02-05 14:54:34,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 103. [2025-02-05 14:54:34,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.5686274509803921) internal successors, (160), 102 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:34,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 160 transitions. [2025-02-05 14:54:34,508 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 160 transitions. Word has length 16 [2025-02-05 14:54:34,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:34,509 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 160 transitions. [2025-02-05 14:54:34,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:34,509 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 160 transitions. [2025-02-05 14:54:34,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-05 14:54:34,509 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:34,509 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:54:34,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-05 14:54:34,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:34,710 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:34,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:34,710 INFO L85 PathProgramCache]: Analyzing trace with hash -2027016176, now seen corresponding path program 2 times [2025-02-05 14:54:34,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:34,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960173164] [2025-02-05 14:54:34,711 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:54:34,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:34,715 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-05 14:54:34,720 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-05 14:54:34,720 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:54:34,720 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-05 14:54:34,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:34,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960173164] [2025-02-05 14:54:34,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960173164] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:34,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051330566] [2025-02-05 14:54:34,853 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:54:34,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:34,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:34,857 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:54:34,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-05 14:54:34,878 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-05 14:54:34,888 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-05 14:54:34,888 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:54:34,888 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:34,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-05 14:54:34,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:34,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-05 14:54:34,937 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:34,983 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-05 14:54:34,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051330566] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:34,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:34,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 17 [2025-02-05 14:54:34,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305640120] [2025-02-05 14:54:34,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:34,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-05 14:54:34,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:34,984 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-05 14:54:34,984 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2025-02-05 14:54:34,984 INFO L87 Difference]: Start difference. First operand 103 states and 160 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:35,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:35,338 INFO L93 Difference]: Finished difference Result 297 states and 496 transitions. [2025-02-05 14:54:35,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-02-05 14:54:35,339 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 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 19 [2025-02-05 14:54:35,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:35,340 INFO L225 Difference]: With dead ends: 297 [2025-02-05 14:54:35,340 INFO L226 Difference]: Without dead ends: 279 [2025-02-05 14:54:35,341 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2025-02-05 14:54:35,341 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:35,341 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 105 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 14:54:35,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2025-02-05 14:54:35,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 183. [2025-02-05 14:54:35,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.5769230769230769) internal successors, (287), 182 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:35,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 287 transitions. [2025-02-05 14:54:35,372 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 287 transitions. Word has length 19 [2025-02-05 14:54:35,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:35,372 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 287 transitions. [2025-02-05 14:54:35,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:35,372 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 287 transitions. [2025-02-05 14:54:35,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-02-05 14:54:35,373 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:35,373 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:54:35,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-05 14:54:35,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-02-05 14:54:35,577 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:35,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:35,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1560257624, now seen corresponding path program 3 times [2025-02-05 14:54:35,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:35,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574831347] [2025-02-05 14:54:35,578 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:54:35,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:35,584 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-02-05 14:54:35,597 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-02-05 14:54:35,600 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-05 14:54:35,601 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:35,680 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-05 14:54:35,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:35,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574831347] [2025-02-05 14:54:35,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574831347] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:35,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762909701] [2025-02-05 14:54:35,680 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:54:35,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:35,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:35,682 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:54:35,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-05 14:54:35,706 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-02-05 14:54:35,718 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-02-05 14:54:35,718 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-05 14:54:35,718 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:35,719 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-05 14:54:35,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:35,739 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-05 14:54:35,741 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:35,783 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-05 14:54:35,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762909701] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:35,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:35,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2025-02-05 14:54:35,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623417434] [2025-02-05 14:54:35,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:35,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-05 14:54:35,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:35,785 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-05 14:54:35,785 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-02-05 14:54:35,785 INFO L87 Difference]: Start difference. First operand 183 states and 287 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:35,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:35,948 INFO L93 Difference]: Finished difference Result 465 states and 735 transitions. [2025-02-05 14:54:35,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 14:54:35,948 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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 20 [2025-02-05 14:54:35,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:35,950 INFO L225 Difference]: With dead ends: 465 [2025-02-05 14:54:35,950 INFO L226 Difference]: Without dead ends: 375 [2025-02-05 14:54:35,950 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2025-02-05 14:54:35,951 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 69 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:35,951 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 106 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:54:35,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2025-02-05 14:54:36,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 255. [2025-02-05 14:54:36,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.5275590551181102) internal successors, (388), 254 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:36,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 388 transitions. [2025-02-05 14:54:36,017 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 388 transitions. Word has length 20 [2025-02-05 14:54:36,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:36,017 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 388 transitions. [2025-02-05 14:54:36,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:36,017 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 388 transitions. [2025-02-05 14:54:36,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-02-05 14:54:36,018 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:36,018 INFO L218 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:54:36,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-05 14:54:36,219 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 [2025-02-05 14:54:36,219 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:36,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:36,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1381570527, now seen corresponding path program 4 times [2025-02-05 14:54:36,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:36,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162091265] [2025-02-05 14:54:36,220 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:54:36,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:36,223 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-02-05 14:54:36,229 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-02-05 14:54:36,229 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:54:36,229 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:36,338 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 14:54:36,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:36,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162091265] [2025-02-05 14:54:36,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162091265] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:36,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113256816] [2025-02-05 14:54:36,339 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:54:36,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:36,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:36,341 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:54:36,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-05 14:54:36,373 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-02-05 14:54:36,383 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-02-05 14:54:36,383 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:54:36,383 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:36,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-05 14:54:36,386 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:36,417 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 14:54:36,417 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:36,661 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 14:54:36,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113256816] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:36,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:36,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2025-02-05 14:54:36,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623978745] [2025-02-05 14:54:36,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:36,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-05 14:54:36,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:36,662 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-05 14:54:36,662 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2025-02-05 14:54:36,662 INFO L87 Difference]: Start difference. First operand 255 states and 388 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:38,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:38,320 INFO L93 Difference]: Finished difference Result 668 states and 1047 transitions. [2025-02-05 14:54:38,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2025-02-05 14:54:38,320 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 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 20 [2025-02-05 14:54:38,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:38,323 INFO L225 Difference]: With dead ends: 668 [2025-02-05 14:54:38,323 INFO L226 Difference]: Without dead ends: 520 [2025-02-05 14:54:38,325 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1180, Invalid=3376, Unknown=0, NotChecked=0, Total=4556 [2025-02-05 14:54:38,325 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 376 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:38,325 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 213 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-05 14:54:38,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2025-02-05 14:54:38,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 348. [2025-02-05 14:54:38,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 1.5072046109510087) internal successors, (523), 347 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:38,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 523 transitions. [2025-02-05 14:54:38,407 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 523 transitions. Word has length 20 [2025-02-05 14:54:38,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:38,407 INFO L471 AbstractCegarLoop]: Abstraction has 348 states and 523 transitions. [2025-02-05 14:54:38,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:38,408 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 523 transitions. [2025-02-05 14:54:38,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-02-05 14:54:38,408 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:38,408 INFO L218 NwaCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:54:38,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-05 14:54:38,613 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 [2025-02-05 14:54:38,613 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:38,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:38,613 INFO L85 PathProgramCache]: Analyzing trace with hash 205206412, now seen corresponding path program 3 times [2025-02-05 14:54:38,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:38,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458960736] [2025-02-05 14:54:38,614 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:54:38,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:38,617 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 7 equivalence classes. [2025-02-05 14:54:38,624 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 21 of 21 statements. [2025-02-05 14:54:38,624 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-02-05 14:54:38,624 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:38,779 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:54:38,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:38,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458960736] [2025-02-05 14:54:38,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458960736] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:38,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568483068] [2025-02-05 14:54:38,780 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:54:38,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:38,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:38,782 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:54:38,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-05 14:54:38,807 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 7 equivalence classes. [2025-02-05 14:54:38,833 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 21 of 21 statements. [2025-02-05 14:54:38,834 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-02-05 14:54:38,834 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:38,836 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-05 14:54:38,837 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:38,877 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:54:38,877 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:39,118 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:54:39,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568483068] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:39,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:39,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2025-02-05 14:54:39,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185302799] [2025-02-05 14:54:39,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:39,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-05 14:54:39,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:39,119 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-05 14:54:39,120 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2025-02-05 14:54:39,120 INFO L87 Difference]: Start difference. First operand 348 states and 523 transitions. Second operand has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 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) [2025-02-05 14:54:42,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:42,989 INFO L93 Difference]: Finished difference Result 1304 states and 2233 transitions. [2025-02-05 14:54:42,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2025-02-05 14:54:42,990 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 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) Word has length 21 [2025-02-05 14:54:42,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:42,994 INFO L225 Difference]: With dead ends: 1304 [2025-02-05 14:54:42,994 INFO L226 Difference]: Without dead ends: 1183 [2025-02-05 14:54:42,996 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1343 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1624, Invalid=3632, Unknown=0, NotChecked=0, Total=5256 [2025-02-05 14:54:42,996 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 1201 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 698 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1201 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 1796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 698 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:42,996 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1201 Valid, 662 Invalid, 1796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [698 Valid, 1098 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2025-02-05 14:54:42,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2025-02-05 14:54:43,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 544. [2025-02-05 14:54:43,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 1.5432780847145489) internal successors, (838), 543 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:43,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 838 transitions. [2025-02-05 14:54:43,139 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 838 transitions. Word has length 21 [2025-02-05 14:54:43,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:43,139 INFO L471 AbstractCegarLoop]: Abstraction has 544 states and 838 transitions. [2025-02-05 14:54:43,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 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) [2025-02-05 14:54:43,140 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 838 transitions. [2025-02-05 14:54:43,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-02-05 14:54:43,140 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:43,140 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:54:43,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-05 14:54:43,341 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 [2025-02-05 14:54:43,341 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:43,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:43,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1296121639, now seen corresponding path program 5 times [2025-02-05 14:54:43,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:43,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617212308] [2025-02-05 14:54:43,341 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 14:54:43,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:43,345 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-05 14:54:43,374 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-05 14:54:43,374 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:54:43,374 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:44,306 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:54:44,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:44,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617212308] [2025-02-05 14:54:44,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617212308] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:44,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628017698] [2025-02-05 14:54:44,306 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 14:54:44,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:44,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:44,308 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:54:44,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-05 14:54:44,338 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-05 14:54:44,362 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-05 14:54:44,363 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:54:44,363 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:44,363 WARN L254 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-02-05 14:54:44,365 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:44,803 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:54:44,803 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:45,528 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:54:45,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628017698] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:45,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:45,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 40 [2025-02-05 14:54:45,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295755212] [2025-02-05 14:54:45,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:45,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-02-05 14:54:45,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:45,529 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-02-05 14:54:45,530 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1305, Unknown=0, NotChecked=0, Total=1560 [2025-02-05 14:54:45,531 INFO L87 Difference]: Start difference. First operand 544 states and 838 transitions. Second operand has 40 states, 40 states have (on average 1.5) internal successors, (60), 40 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:48,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:48,061 INFO L93 Difference]: Finished difference Result 681 states and 1014 transitions. [2025-02-05 14:54:48,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-02-05 14:54:48,061 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.5) internal successors, (60), 40 states have internal predecessors, (60), 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 22 [2025-02-05 14:54:48,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:48,064 INFO L225 Difference]: With dead ends: 681 [2025-02-05 14:54:48,064 INFO L226 Difference]: Without dead ends: 660 [2025-02-05 14:54:48,065 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=504, Invalid=2802, Unknown=0, NotChecked=0, Total=3306 [2025-02-05 14:54:48,066 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 54 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:48,066 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 92 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-05 14:54:48,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2025-02-05 14:54:48,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 527. [2025-02-05 14:54:48,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 1.553231939163498) internal successors, (817), 526 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:48,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 817 transitions. [2025-02-05 14:54:48,246 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 817 transitions. Word has length 22 [2025-02-05 14:54:48,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:48,247 INFO L471 AbstractCegarLoop]: Abstraction has 527 states and 817 transitions. [2025-02-05 14:54:48,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.5) internal successors, (60), 40 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:48,247 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 817 transitions. [2025-02-05 14:54:48,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-02-05 14:54:48,247 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:48,247 INFO L218 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:54:48,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-05 14:54:48,452 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 [2025-02-05 14:54:48,452 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:48,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:48,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1998681624, now seen corresponding path program 1 times [2025-02-05 14:54:48,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:48,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251484414] [2025-02-05 14:54:48,453 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:54:48,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:48,456 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-05 14:54:48,461 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-05 14:54:48,462 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:54:48,462 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:48,532 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-05 14:54:48,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:48,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251484414] [2025-02-05 14:54:48,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251484414] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:48,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39492721] [2025-02-05 14:54:48,532 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:54:48,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:48,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:48,537 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:54:48,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-05 14:54:48,564 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-05 14:54:48,574 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-05 14:54:48,574 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:54:48,575 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:48,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-05 14:54:48,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-05 14:54:48,620 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:48,774 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-05 14:54:48,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39492721] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:48,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:48,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 22 [2025-02-05 14:54:48,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917014104] [2025-02-05 14:54:48,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:48,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-05 14:54:48,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:48,775 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-05 14:54:48,776 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2025-02-05 14:54:48,776 INFO L87 Difference]: Start difference. First operand 527 states and 817 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:53,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:53,954 INFO L93 Difference]: Finished difference Result 1183 states and 1746 transitions. [2025-02-05 14:54:53,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2025-02-05 14:54:53,954 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2025-02-05 14:54:53,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:53,957 INFO L225 Difference]: With dead ends: 1183 [2025-02-05 14:54:53,957 INFO L226 Difference]: Without dead ends: 987 [2025-02-05 14:54:53,962 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10050 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3517, Invalid=23543, Unknown=0, NotChecked=0, Total=27060 [2025-02-05 14:54:53,962 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 318 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:53,962 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 149 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-02-05 14:54:53,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2025-02-05 14:54:54,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 662. [2025-02-05 14:54:54,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.5355521936459908) internal successors, (1015), 661 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:54,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1015 transitions. [2025-02-05 14:54:54,252 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1015 transitions. Word has length 23 [2025-02-05 14:54:54,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:54,252 INFO L471 AbstractCegarLoop]: Abstraction has 662 states and 1015 transitions. [2025-02-05 14:54:54,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:54,253 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1015 transitions. [2025-02-05 14:54:54,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-02-05 14:54:54,258 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:54,258 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:54:54,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-05 14:54:54,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-05 14:54:54,459 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:54,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:54,459 INFO L85 PathProgramCache]: Analyzing trace with hash -778409080, now seen corresponding path program 3 times [2025-02-05 14:54:54,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:54,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281217532] [2025-02-05 14:54:54,459 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:54:54,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:54,467 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 4 equivalence classes. [2025-02-05 14:54:54,513 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 25 of 25 statements. [2025-02-05 14:54:54,513 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-05 14:54:54,513 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:54,821 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:54:54,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:54,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281217532] [2025-02-05 14:54:54,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281217532] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:54,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054746473] [2025-02-05 14:54:54,822 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:54:54,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:54,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:54,824 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:54:54,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-05 14:54:54,848 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 4 equivalence classes. [2025-02-05 14:54:54,871 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 25 of 25 statements. [2025-02-05 14:54:54,872 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-05 14:54:54,872 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:54,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-05 14:54:54,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 14:54:55,051 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:55,196 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 14:54:55,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054746473] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:55,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:55,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 21 [2025-02-05 14:54:55,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27550946] [2025-02-05 14:54:55,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:55,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-05 14:54:55,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:55,197 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-05 14:54:55,197 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2025-02-05 14:54:55,197 INFO L87 Difference]: Start difference. First operand 662 states and 1015 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:59,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:59,826 INFO L93 Difference]: Finished difference Result 1423 states and 2119 transitions. [2025-02-05 14:54:59,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2025-02-05 14:54:59,827 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2025-02-05 14:54:59,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:59,831 INFO L225 Difference]: With dead ends: 1423 [2025-02-05 14:54:59,831 INFO L226 Difference]: Without dead ends: 1236 [2025-02-05 14:54:59,834 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 39 SyntacticMatches, 10 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10570 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1865, Invalid=25857, Unknown=0, NotChecked=0, Total=27722 [2025-02-05 14:54:59,834 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 440 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 1919 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 2359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 1919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:59,835 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 204 Invalid, 2359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 1919 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-02-05 14:54:59,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2025-02-05 14:55:00,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 588. [2025-02-05 14:55:00,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 1.5298126064735946) internal successors, (898), 587 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:55:00,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 898 transitions. [2025-02-05 14:55:00,091 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 898 transitions. Word has length 25 [2025-02-05 14:55:00,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:55:00,091 INFO L471 AbstractCegarLoop]: Abstraction has 588 states and 898 transitions. [2025-02-05 14:55:00,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:55:00,091 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 898 transitions. [2025-02-05 14:55:00,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-02-05 14:55:00,092 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:55:00,092 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:55:00,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-05 14:55:00,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:55:00,293 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:55:00,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:55:00,293 INFO L85 PathProgramCache]: Analyzing trace with hash 299653498, now seen corresponding path program 6 times [2025-02-05 14:55:00,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:55:00,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585348569] [2025-02-05 14:55:00,293 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 14:55:00,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:55:00,296 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 3 equivalence classes. [2025-02-05 14:55:00,308 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-02-05 14:55:00,308 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-05 14:55:00,308 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:55:00,418 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-05 14:55:00,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:55:00,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585348569] [2025-02-05 14:55:00,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585348569] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:55:00,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707506378] [2025-02-05 14:55:00,419 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 14:55:00,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:55:00,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:55:00,421 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:55:00,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-05 14:55:00,443 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 3 equivalence classes. [2025-02-05 14:55:00,454 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-02-05 14:55:00,454 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-05 14:55:00,454 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:55:00,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 14:55:00,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:55:00,496 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-05 14:55:00,496 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:55:00,561 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-05 14:55:00,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707506378] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:55:00,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:55:00,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2025-02-05 14:55:00,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360430285] [2025-02-05 14:55:00,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:55:00,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-05 14:55:00,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:55:00,562 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-05 14:55:00,562 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-02-05 14:55:00,562 INFO L87 Difference]: Start difference. First operand 588 states and 898 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:55:01,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:55:01,372 INFO L93 Difference]: Finished difference Result 1297 states and 1936 transitions. [2025-02-05 14:55:01,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-05 14:55:01,373 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 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 26 [2025-02-05 14:55:01,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:55:01,376 INFO L225 Difference]: With dead ends: 1297 [2025-02-05 14:55:01,376 INFO L226 Difference]: Without dead ends: 1086 [2025-02-05 14:55:01,377 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2025-02-05 14:55:01,377 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 150 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:55:01,378 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 141 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:55:01,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2025-02-05 14:55:01,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 680. [2025-02-05 14:55:01,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 1.5110456553755522) internal successors, (1026), 679 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:55:01,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 1026 transitions. [2025-02-05 14:55:01,685 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 1026 transitions. Word has length 26 [2025-02-05 14:55:01,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:55:01,685 INFO L471 AbstractCegarLoop]: Abstraction has 680 states and 1026 transitions. [2025-02-05 14:55:01,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:55:01,686 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 1026 transitions. [2025-02-05 14:55:01,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-02-05 14:55:01,686 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:55:01,687 INFO L218 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:55:01,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-05 14:55:01,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:55:01,891 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:55:01,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:55:01,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1103458924, now seen corresponding path program 7 times [2025-02-05 14:55:01,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:55:01,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623906687] [2025-02-05 14:55:01,892 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 14:55:01,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:55:01,898 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-05 14:55:01,903 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-05 14:55:01,903 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:55:01,903 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:55:02,058 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 14:55:02,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:55:02,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623906687] [2025-02-05 14:55:02,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623906687] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:55:02,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517216005] [2025-02-05 14:55:02,059 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 14:55:02,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:55:02,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:55:02,067 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:55:02,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-05 14:55:02,091 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-05 14:55:02,104 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-05 14:55:02,104 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:55:02,104 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:55:02,104 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-02-05 14:55:02,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:55:02,160 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 14:55:02,160 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:55:02,510 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 14:55:02,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517216005] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:55:02,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:55:02,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2025-02-05 14:55:02,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339573216] [2025-02-05 14:55:02,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:55:02,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-02-05 14:55:02,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:55:02,511 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-02-05 14:55:02,511 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=818, Unknown=0, NotChecked=0, Total=1056 [2025-02-05 14:55:02,511 INFO L87 Difference]: Start difference. First operand 680 states and 1026 transitions. Second operand has 33 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:55:12,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:55:12,474 INFO L93 Difference]: Finished difference Result 1960 states and 3114 transitions. [2025-02-05 14:55:12,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2025-02-05 14:55:12,475 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2025-02-05 14:55:12,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:55:12,479 INFO L225 Difference]: With dead ends: 1960 [2025-02-05 14:55:12,479 INFO L226 Difference]: Without dead ends: 1660 [2025-02-05 14:55:12,482 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7830 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=5439, Invalid=14867, Unknown=0, NotChecked=0, Total=20306 [2025-02-05 14:55:12,482 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 1265 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 1458 mSolverCounterSat, 886 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1265 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 2344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 886 IncrementalHoareTripleChecker+Valid, 1458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2025-02-05 14:55:12,482 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1265 Valid, 805 Invalid, 2344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [886 Valid, 1458 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2025-02-05 14:55:12,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2025-02-05 14:55:12,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 751. [2025-02-05 14:55:12,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 1.5106666666666666) internal successors, (1133), 750 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:55:12,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 1133 transitions. [2025-02-05 14:55:12,970 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 1133 transitions. Word has length 27 [2025-02-05 14:55:12,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:55:12,970 INFO L471 AbstractCegarLoop]: Abstraction has 751 states and 1133 transitions. [2025-02-05 14:55:12,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:55:12,970 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 1133 transitions. [2025-02-05 14:55:12,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-02-05 14:55:12,971 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:55:12,971 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:55:12,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-05 14:55:13,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-02-05 14:55:13,175 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:55:13,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:55:13,179 INFO L85 PathProgramCache]: Analyzing trace with hash -987553759, now seen corresponding path program 8 times [2025-02-05 14:55:13,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:55:13,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113042023] [2025-02-05 14:55:13,180 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:55:13,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:55:13,182 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-05 14:55:13,198 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-05 14:55:13,198 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:55:13,198 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:55:13,371 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-05 14:55:13,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:55:13,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113042023] [2025-02-05 14:55:13,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113042023] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:55:13,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299206334] [2025-02-05 14:55:13,371 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:55:13,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:55:13,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:55:13,373 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:55:13,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-05 14:55:13,395 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-05 14:55:13,429 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-05 14:55:13,430 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:55:13,430 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:55:13,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-02-05 14:55:13,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:55:13,635 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 14:55:13,635 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:55:13,928 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 14:55:13,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299206334] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:55:13,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:55:13,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 26 [2025-02-05 14:55:13,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369216720] [2025-02-05 14:55:13,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:55:13,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-05 14:55:13,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:55:13,929 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-05 14:55:13,929 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2025-02-05 14:55:13,929 INFO L87 Difference]: Start difference. First operand 751 states and 1133 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:55:15,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:55:15,864 INFO L93 Difference]: Finished difference Result 860 states and 1267 transitions. [2025-02-05 14:55:15,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2025-02-05 14:55:15,864 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2025-02-05 14:55:15,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:55:15,867 INFO L225 Difference]: With dead ends: 860 [2025-02-05 14:55:15,868 INFO L226 Difference]: Without dead ends: 810 [2025-02-05 14:55:15,869 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 30 SyntacticMatches, 13 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=442, Invalid=2638, Unknown=0, NotChecked=0, Total=3080 [2025-02-05 14:55:15,873 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 66 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-05 14:55:15,874 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 116 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-02-05 14:55:15,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2025-02-05 14:55:16,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 739. [2025-02-05 14:55:16,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 1.5149051490514904) internal successors, (1118), 738 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:55:16,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1118 transitions. [2025-02-05 14:55:16,250 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1118 transitions. Word has length 28 [2025-02-05 14:55:16,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:55:16,250 INFO L471 AbstractCegarLoop]: Abstraction has 739 states and 1118 transitions. [2025-02-05 14:55:16,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:55:16,250 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1118 transitions. [2025-02-05 14:55:16,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-02-05 14:55:16,251 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:55:16,251 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:55:16,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-02-05 14:55:16,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-05 14:55:16,455 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:55:16,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:55:16,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1358184377, now seen corresponding path program 4 times [2025-02-05 14:55:16,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:55:16,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680010691] [2025-02-05 14:55:16,455 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:55:16,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:55:16,458 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-05 14:55:16,464 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-05 14:55:16,464 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:55:16,464 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:55:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:55:16,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:55:16,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680010691] [2025-02-05 14:55:16,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680010691] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:55:16,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183402273] [2025-02-05 14:55:16,634 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:55:16,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:55:16,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:55:16,635 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:55:16,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-05 14:55:16,658 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-05 14:55:16,670 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-05 14:55:16,670 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:55:16,670 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:55:16,670 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-02-05 14:55:16,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:55:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:55:16,691 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:55:16,970 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:55:16,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183402273] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:55:16,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:55:16,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 31 [2025-02-05 14:55:16,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275916360] [2025-02-05 14:55:16,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:55:16,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-02-05 14:55:16,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:55:16,972 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-02-05 14:55:16,972 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2025-02-05 14:55:16,973 INFO L87 Difference]: Start difference. First operand 739 states and 1118 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:55:31,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:55:31,498 INFO L93 Difference]: Finished difference Result 1686 states and 2493 transitions. [2025-02-05 14:55:31,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 260 states. [2025-02-05 14:55:31,498 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 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 28 [2025-02-05 14:55:31,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:55:31,504 INFO L225 Difference]: With dead ends: 1686 [2025-02-05 14:55:31,504 INFO L226 Difference]: Without dead ends: 1594 [2025-02-05 14:55:31,510 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31381 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=14450, Invalid=59262, Unknown=0, NotChecked=0, Total=73712 [2025-02-05 14:55:31,511 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 995 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 2073 mSolverCounterSat, 922 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 995 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 2995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 922 IncrementalHoareTripleChecker+Valid, 2073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2025-02-05 14:55:31,511 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [995 Valid, 311 Invalid, 2995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [922 Valid, 2073 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2025-02-05 14:55:31,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2025-02-05 14:55:32,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 823. [2025-02-05 14:55:32,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 822 states have (on average 1.5182481751824817) internal successors, (1248), 822 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:55:32,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 1248 transitions. [2025-02-05 14:55:32,067 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 1248 transitions. Word has length 28 [2025-02-05 14:55:32,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:55:32,068 INFO L471 AbstractCegarLoop]: Abstraction has 823 states and 1248 transitions. [2025-02-05 14:55:32,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:55:32,068 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 1248 transitions. [2025-02-05 14:55:32,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-02-05 14:55:32,072 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:55:32,072 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:55:32,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-02-05 14:55:32,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-05 14:55:32,274 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:55:32,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:55:32,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1535506954, now seen corresponding path program 5 times [2025-02-05 14:55:32,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:55:32,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646194108] [2025-02-05 14:55:32,274 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 14:55:32,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:55:32,277 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 5 equivalence classes. [2025-02-05 14:55:32,291 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 30 of 30 statements. [2025-02-05 14:55:32,291 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-05 14:55:32,291 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:55:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2025-02-05 14:55:32,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:55:32,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646194108] [2025-02-05 14:55:32,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646194108] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:55:32,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532655677] [2025-02-05 14:55:32,416 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 14:55:32,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:55:32,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:55:32,420 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:55:32,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-05 14:55:32,445 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 5 equivalence classes. [2025-02-05 14:55:32,485 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 30 of 30 statements. [2025-02-05 14:55:32,485 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-05 14:55:32,485 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:55:32,486 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-02-05 14:55:32,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:55:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-05 14:55:32,731 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:55:33,128 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-05 14:55:33,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532655677] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:55:33,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:55:33,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17, 16] total 39 [2025-02-05 14:55:33,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452891892] [2025-02-05 14:55:33,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:55:33,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-02-05 14:55:33,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:55:33,129 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-02-05 14:55:33,129 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1280, Unknown=0, NotChecked=0, Total=1482 [2025-02-05 14:55:33,129 INFO L87 Difference]: Start difference. First operand 823 states and 1248 transitions. Second operand has 39 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 39 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:55:43,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:55:43,130 INFO L93 Difference]: Finished difference Result 1894 states and 2828 transitions. [2025-02-05 14:55:43,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 241 states. [2025-02-05 14:55:43,130 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 39 states have internal predecessors, (54), 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 30 [2025-02-05 14:55:43,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:55:43,135 INFO L225 Difference]: With dead ends: 1894 [2025-02-05 14:55:43,135 INFO L226 Difference]: Without dead ends: 1574 [2025-02-05 14:55:43,137 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22364 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=3567, Invalid=54273, Unknown=0, NotChecked=0, Total=57840 [2025-02-05 14:55:43,137 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 817 mSDsluCounter, 1265 mSDsCounter, 0 mSdLazyCounter, 4782 mSolverCounterSat, 1328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 6110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1328 IncrementalHoareTripleChecker+Valid, 4782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2025-02-05 14:55:43,137 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [817 Valid, 1338 Invalid, 6110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1328 Valid, 4782 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2025-02-05 14:55:43,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2025-02-05 14:55:44,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1013. [2025-02-05 14:55:44,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 1.4407114624505928) internal successors, (1458), 1012 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:55:44,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1458 transitions. [2025-02-05 14:55:44,073 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1458 transitions. Word has length 30 [2025-02-05 14:55:44,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:55:44,073 INFO L471 AbstractCegarLoop]: Abstraction has 1013 states and 1458 transitions. [2025-02-05 14:55:44,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 39 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:55:44,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1458 transitions. [2025-02-05 14:55:44,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-02-05 14:55:44,074 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:55:44,074 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:55:44,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-05 14:55:44,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-05 14:55:44,275 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:55:44,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:55:44,275 INFO L85 PathProgramCache]: Analyzing trace with hash -987585704, now seen corresponding path program 9 times [2025-02-05 14:55:44,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:55:44,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442317546] [2025-02-05 14:55:44,276 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:55:44,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:55:44,279 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 32 statements into 3 equivalence classes. [2025-02-05 14:55:44,295 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 32 of 32 statements. [2025-02-05 14:55:44,295 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 14:55:44,295 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:55:44,382 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-05 14:55:44,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:55:44,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442317546] [2025-02-05 14:55:44,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442317546] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:55:44,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461874017] [2025-02-05 14:55:44,382 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:55:44,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:55:44,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:55:44,384 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:55:44,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-05 14:55:44,407 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 32 statements into 3 equivalence classes. [2025-02-05 14:55:44,421 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 32 of 32 statements. [2025-02-05 14:55:44,422 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 14:55:44,422 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:55:44,422 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-05 14:55:44,423 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:55:44,489 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-02-05 14:55:44,490 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:55:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-02-05 14:55:44,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461874017] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:55:44,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:55:44,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2025-02-05 14:55:44,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102565692] [2025-02-05 14:55:44,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:55:44,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 14:55:44,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:55:44,571 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 14:55:44,572 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2025-02-05 14:55:44,572 INFO L87 Difference]: Start difference. First operand 1013 states and 1458 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:55:47,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:55:47,016 INFO L93 Difference]: Finished difference Result 2163 states and 3070 transitions. [2025-02-05 14:55:47,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-05 14:55:47,017 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2025-02-05 14:55:47,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:55:47,022 INFO L225 Difference]: With dead ends: 2163 [2025-02-05 14:55:47,022 INFO L226 Difference]: Without dead ends: 1869 [2025-02-05 14:55:47,023 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2025-02-05 14:55:47,023 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 224 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:55:47,023 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 195 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:55:47,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2025-02-05 14:55:48,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1223. [2025-02-05 14:55:48,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1223 states, 1222 states have (on average 1.425531914893617) internal successors, (1742), 1222 states have internal predecessors, (1742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:55:48,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1223 states to 1223 states and 1742 transitions. [2025-02-05 14:55:48,044 INFO L78 Accepts]: Start accepts. Automaton has 1223 states and 1742 transitions. Word has length 32 [2025-02-05 14:55:48,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:55:48,044 INFO L471 AbstractCegarLoop]: Abstraction has 1223 states and 1742 transitions. [2025-02-05 14:55:48,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:55:48,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1223 states and 1742 transitions. [2025-02-05 14:55:48,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-02-05 14:55:48,049 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:55:48,049 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:55:48,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-02-05 14:55:48,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:55:48,250 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:55:48,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:55:48,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1475822585, now seen corresponding path program 1 times [2025-02-05 14:55:48,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:55:48,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771097612] [2025-02-05 14:55:48,251 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:55:48,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:55:48,253 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-05 14:55:48,258 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-05 14:55:48,258 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:55:48,258 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:55:48,368 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-02-05 14:55:48,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:55:48,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771097612] [2025-02-05 14:55:48,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771097612] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:55:48,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626407934] [2025-02-05 14:55:48,369 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:55:48,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:55:48,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:55:48,371 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:55:48,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-05 14:55:48,393 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-05 14:55:48,407 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-05 14:55:48,407 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:55:48,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:55:48,408 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-02-05 14:55:48,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:55:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-02-05 14:55:48,458 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:55:48,569 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-02-05 14:55:48,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626407934] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:55:48,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:55:48,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 8] total 23 [2025-02-05 14:55:48,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010786907] [2025-02-05 14:55:48,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:55:48,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-05 14:55:48,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:55:48,570 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-05 14:55:48,570 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2025-02-05 14:55:48,570 INFO L87 Difference]: Start difference. First operand 1223 states and 1742 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:55:50,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:55:50,946 INFO L93 Difference]: Finished difference Result 1474 states and 2054 transitions. [2025-02-05 14:55:50,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2025-02-05 14:55:50,947 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 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 32 [2025-02-05 14:55:50,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:55:50,951 INFO L225 Difference]: With dead ends: 1474 [2025-02-05 14:55:50,951 INFO L226 Difference]: Without dead ends: 1284 [2025-02-05 14:55:50,951 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=351, Invalid=3071, Unknown=0, NotChecked=0, Total=3422 [2025-02-05 14:55:50,952 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 77 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-05 14:55:50,952 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 529 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-05 14:55:50,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2025-02-05 14:55:51,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1138. [2025-02-05 14:55:51,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1137 states have (on average 1.4423922603342128) internal successors, (1640), 1137 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:55:51,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1640 transitions. [2025-02-05 14:55:51,861 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1640 transitions. Word has length 32 [2025-02-05 14:55:51,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:55:51,861 INFO L471 AbstractCegarLoop]: Abstraction has 1138 states and 1640 transitions. [2025-02-05 14:55:51,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:55:51,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1640 transitions. [2025-02-05 14:55:51,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-02-05 14:55:51,862 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:55:51,862 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:55:51,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-02-05 14:55:52,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:55:52,063 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:55:52,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:55:52,064 INFO L85 PathProgramCache]: Analyzing trace with hash -485268051, now seen corresponding path program 6 times [2025-02-05 14:55:52,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:55:52,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169333147] [2025-02-05 14:55:52,064 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 14:55:52,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:55:52,066 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 33 statements into 5 equivalence classes. [2025-02-05 14:55:52,074 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 33 of 33 statements. [2025-02-05 14:55:52,074 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-05 14:55:52,074 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:55:52,422 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-05 14:55:52,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:55:52,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169333147] [2025-02-05 14:55:52,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169333147] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:55:52,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191188926] [2025-02-05 14:55:52,422 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 14:55:52,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:55:52,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:55:52,424 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:55:52,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-05 14:55:52,451 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 33 statements into 5 equivalence classes. [2025-02-05 14:55:52,489 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 33 of 33 statements. [2025-02-05 14:55:52,489 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-05 14:55:52,489 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:55:52,490 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-02-05 14:55:52,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:55:52,586 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-05 14:55:52,586 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:55:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-05 14:55:53,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191188926] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:55:53,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:55:53,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 39 [2025-02-05 14:55:53,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384306297] [2025-02-05 14:55:53,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:55:53,012 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-02-05 14:55:53,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:55:53,012 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-02-05 14:55:53,012 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1229, Unknown=0, NotChecked=0, Total=1482 [2025-02-05 14:55:53,013 INFO L87 Difference]: Start difference. First operand 1138 states and 1640 transitions. Second operand has 39 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 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)