./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de41.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-de41.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 71e52c2f7da6d5380080fb621ed04f7c322fd22e434b0426cf7577ab025ae680 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 14:52:56,855 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 14:52:56,893 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 14:52:56,897 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 14:52:56,897 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 14:52:56,912 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 14:52:56,912 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 14:52:56,912 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 14:52:56,913 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 14:52:56,913 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 14:52:56,913 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 14:52:56,913 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 14:52:56,913 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 14:52:56,913 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 14:52:56,913 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 14:52:56,913 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 14:52:56,914 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 14:52:56,914 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 14:52:56,914 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 14:52:56,914 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 14:52:56,914 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 14:52:56,914 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 14:52:56,914 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 14:52:56,914 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 14:52:56,914 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 14:52:56,914 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 14:52:56,914 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 14:52:56,915 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 14:52:56,915 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 14:52:56,915 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 14:52:56,915 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 14:52:56,915 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 14:52:56,915 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 14:52:56,915 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 14:52:56,915 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 14:52:56,915 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 14:52:56,915 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 14:52:56,915 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 14:52:56,915 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 14:52:56,915 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 14:52:56,915 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 14:52:56,915 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 14:52:56,916 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 14:52:56,916 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 -> 71e52c2f7da6d5380080fb621ed04f7c322fd22e434b0426cf7577ab025ae680 [2025-02-05 14:52:57,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 14:52:57,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 14:52:57,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 14:52:57,110 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 14:52:57,110 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 14:52:57,112 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de41.c [2025-02-05 14:52:58,366 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/87b5f0304/c39aea6e33d64684865a9a914994b4e7/FLAGdf9b9d3fb [2025-02-05 14:52:58,610 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 14:52:58,612 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de41.c [2025-02-05 14:52:58,617 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/87b5f0304/c39aea6e33d64684865a9a914994b4e7/FLAGdf9b9d3fb [2025-02-05 14:52:58,940 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/87b5f0304/c39aea6e33d64684865a9a914994b4e7 [2025-02-05 14:52:58,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 14:52:58,943 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 14:52:58,948 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 14:52:58,948 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 14:52:58,951 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 14:52:58,952 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 02:52:58" (1/1) ... [2025-02-05 14:52:58,952 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3db62278 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:58, skipping insertion in model container [2025-02-05 14:52:58,952 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 02:52:58" (1/1) ... [2025-02-05 14:52:58,961 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 14:52:59,039 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-de41.c[368,381] [2025-02-05 14:52:59,052 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 14:52:59,060 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 14:52:59,066 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-de41.c[368,381] [2025-02-05 14:52:59,068 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 14:52:59,076 INFO L204 MainTranslator]: Completed translation [2025-02-05 14:52:59,077 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:59 WrapperNode [2025-02-05 14:52:59,077 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 14:52:59,078 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 14:52:59,078 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 14:52:59,078 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 14:52:59,081 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:59" (1/1) ... [2025-02-05 14:52:59,084 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:59" (1/1) ... [2025-02-05 14:52:59,093 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2025-02-05 14:52:59,093 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 14:52:59,094 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 14:52:59,094 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 14:52:59,094 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 14:52:59,098 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:59" (1/1) ... [2025-02-05 14:52:59,098 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:59" (1/1) ... [2025-02-05 14:52:59,099 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:59" (1/1) ... [2025-02-05 14:52:59,105 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 14:52:59,105 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:59" (1/1) ... [2025-02-05 14:52:59,105 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:59" (1/1) ... [2025-02-05 14:52:59,106 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:59" (1/1) ... [2025-02-05 14:52:59,107 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:59" (1/1) ... [2025-02-05 14:52:59,107 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:59" (1/1) ... [2025-02-05 14:52:59,108 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:59" (1/1) ... [2025-02-05 14:52:59,108 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 14:52:59,109 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 14:52:59,109 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 14:52:59,109 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 14:52:59,109 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:59" (1/1) ... [2025-02-05 14:52:59,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 14:52:59,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:52:59,129 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 14:52:59,132 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 14:52:59,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 14:52:59,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 14:52:59,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 14:52:59,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 14:52:59,182 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 14:52:59,183 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 14:52:59,265 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2025-02-05 14:52:59,266 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 14:52:59,271 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 14:52:59,271 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 14:52:59,272 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 02:52:59 BoogieIcfgContainer [2025-02-05 14:52:59,272 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 14:52:59,273 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 14:52:59,273 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 14:52:59,276 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 14:52:59,276 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 02:52:58" (1/3) ... [2025-02-05 14:52:59,277 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@260d71fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 02:52:59, skipping insertion in model container [2025-02-05 14:52:59,277 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:59" (2/3) ... [2025-02-05 14:52:59,277 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@260d71fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 02:52:59, skipping insertion in model container [2025-02-05 14:52:59,277 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 02:52:59" (3/3) ... [2025-02-05 14:52:59,278 INFO L128 eAbstractionObserver]: Analyzing ICFG in-de41.c [2025-02-05 14:52:59,287 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 14:52:59,288 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG in-de41.c that has 1 procedures, 13 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2025-02-05 14:52:59,328 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 14:52:59,335 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;@56d22683, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 14:52:59,335 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 14:52:59,338 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 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 14:52:59,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-02-05 14:52:59,341 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:52:59,341 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:52:59,341 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:52:59,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:52:59,345 INFO L85 PathProgramCache]: Analyzing trace with hash -516143365, now seen corresponding path program 1 times [2025-02-05 14:52:59,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:52:59,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103744658] [2025-02-05 14:52:59,350 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:52:59,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:52:59,389 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-05 14:52:59,407 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-05 14:52:59,408 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:52:59,408 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:59,728 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 14:52:59,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:52:59,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103744658] [2025-02-05 14:52:59,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103744658] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:52:59,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 14:52:59,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 14:52:59,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555609528] [2025-02-05 14:52:59,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:52:59,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 14:52:59,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:52:59,745 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 14:52:59,745 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-05 14:52:59,747 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 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) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 14:52:59,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:52:59,786 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2025-02-05 14:52:59,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 14:52:59,788 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 8 [2025-02-05 14:52:59,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:52:59,792 INFO L225 Difference]: With dead ends: 27 [2025-02-05 14:52:59,793 INFO L226 Difference]: Without dead ends: 11 [2025-02-05 14:52:59,795 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-05 14:52:59,796 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:52:59,797 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:52:59,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2025-02-05 14:52:59,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2025-02-05 14:52:59,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 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 14:52:59,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2025-02-05 14:52:59,816 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 8 [2025-02-05 14:52:59,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:52:59,817 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2025-02-05 14:52:59,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 14:52:59,817 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2025-02-05 14:52:59,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-05 14:52:59,817 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:52:59,817 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:52:59,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 14:52:59,818 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:52:59,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:52:59,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1152734091, now seen corresponding path program 1 times [2025-02-05 14:52:59,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:52:59,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154627865] [2025-02-05 14:52:59,819 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:52:59,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:52:59,823 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-05 14:52:59,828 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-05 14:52:59,828 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:52:59,828 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:59,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:52:59,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:52:59,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154627865] [2025-02-05 14:52:59,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154627865] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:52:59,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 14:52:59,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-05 14:52:59,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695313502] [2025-02-05 14:52:59,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:52:59,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-05 14:52:59,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:52:59,864 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-05 14:52:59,864 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-05 14:52:59,879 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 14:52:59,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:52:59,900 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2025-02-05 14:52:59,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-05 14:52:59,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2025-02-05 14:52:59,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:52:59,901 INFO L225 Difference]: With dead ends: 17 [2025-02-05 14:52:59,901 INFO L226 Difference]: Without dead ends: 10 [2025-02-05 14:52:59,901 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-02-05 14:52:59,902 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:52:59,902 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 21 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:52:59,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2025-02-05 14:52:59,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2025-02-05 14:52:59,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:52:59,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2025-02-05 14:52:59,904 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 9 [2025-02-05 14:52:59,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:52:59,904 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2025-02-05 14:52:59,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 14:52:59,904 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2025-02-05 14:52:59,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-05 14:52:59,905 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:52:59,905 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:52:59,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-05 14:52:59,905 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:52:59,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:52:59,905 INFO L85 PathProgramCache]: Analyzing trace with hash 2097496074, now seen corresponding path program 1 times [2025-02-05 14:52:59,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:52:59,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58216042] [2025-02-05 14:52:59,906 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:52:59,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:52:59,909 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-05 14:52:59,912 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-05 14:52:59,913 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:52:59,913 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:59,960 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 14:52:59,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:52:59,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58216042] [2025-02-05 14:52:59,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58216042] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:52:59,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523398229] [2025-02-05 14:52:59,960 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:52:59,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:52:59,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:52:59,965 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 14:52:59,966 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 14:52:59,988 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-05 14:52:59,994 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-05 14:52:59,994 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:52:59,994 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:59,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-05 14:52:59,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:00,018 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 14:53:00,019 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:00,056 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 14:53:00,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523398229] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:00,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:00,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2025-02-05 14:53:00,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496209489] [2025-02-05 14:53:00,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:00,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-05 14:53:00,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:00,058 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-05 14:53:00,058 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2025-02-05 14:53:00,058 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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 14:53:00,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:00,163 INFO L93 Difference]: Finished difference Result 34 states and 57 transitions. [2025-02-05 14:53:00,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 14:53:00,163 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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 9 [2025-02-05 14:53:00,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:00,164 INFO L225 Difference]: With dead ends: 34 [2025-02-05 14:53:00,164 INFO L226 Difference]: Without dead ends: 29 [2025-02-05 14:53:00,165 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 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 14:53:00,165 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 23 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:00,165 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 25 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:53:00,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-02-05 14:53:00,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2025-02-05 14:53:00,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 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 14:53:00,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2025-02-05 14:53:00,169 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 9 [2025-02-05 14:53:00,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:00,170 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2025-02-05 14:53:00,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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 14:53:00,170 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2025-02-05 14:53:00,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-02-05 14:53:00,170 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:00,170 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:00,176 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 14:53:00,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:00,371 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:00,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:00,371 INFO L85 PathProgramCache]: Analyzing trace with hash 525818982, now seen corresponding path program 1 times [2025-02-05 14:53:00,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:00,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799934596] [2025-02-05 14:53:00,371 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:53:00,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:00,375 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-05 14:53:00,380 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-05 14:53:00,380 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:53:00,380 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:00,421 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 14:53:00,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:00,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799934596] [2025-02-05 14:53:00,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799934596] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:00,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394534637] [2025-02-05 14:53:00,422 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:53:00,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:00,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:00,427 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 14:53:00,428 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 14:53:00,448 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-05 14:53:00,455 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-05 14:53:00,455 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:53:00,455 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:00,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-05 14:53:00,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:00,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-05 14:53:00,486 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-05 14:53:00,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394534637] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:00,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:00,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2025-02-05 14:53:00,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708734983] [2025-02-05 14:53:00,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:00,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-05 14:53:00,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:00,502 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-05 14:53:00,502 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-02-05 14:53:00,502 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 14:53:00,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:00,541 INFO L93 Difference]: Finished difference Result 52 states and 79 transitions. [2025-02-05 14:53:00,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-05 14:53:00,542 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 14:53:00,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:00,542 INFO L225 Difference]: With dead ends: 52 [2025-02-05 14:53:00,542 INFO L226 Difference]: Without dead ends: 48 [2025-02-05 14:53:00,542 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2025-02-05 14:53:00,543 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:00,543 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 32 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:53:00,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-02-05 14:53:00,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2025-02-05 14:53:00,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 41 states have internal predecessors, (63), 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 14:53:00,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 63 transitions. [2025-02-05 14:53:00,550 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 63 transitions. Word has length 11 [2025-02-05 14:53:00,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:00,550 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 63 transitions. [2025-02-05 14:53:00,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 14:53:00,550 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 63 transitions. [2025-02-05 14:53:00,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-02-05 14:53:00,551 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:00,551 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:00,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-05 14:53:00,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:00,752 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:00,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:00,752 INFO L85 PathProgramCache]: Analyzing trace with hash -879448993, now seen corresponding path program 1 times [2025-02-05 14:53:00,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:00,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172611687] [2025-02-05 14:53:00,752 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:53:00,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:00,756 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-05 14:53:00,766 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-05 14:53:00,766 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:53:00,766 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:53:00,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:00,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172611687] [2025-02-05 14:53:00,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172611687] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:00,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661992046] [2025-02-05 14:53:00,976 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:53:00,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:00,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:00,977 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 14:53:00,979 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 14:53:00,997 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-05 14:53:01,007 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-05 14:53:01,007 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:53:01,007 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:01,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-05 14:53:01,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:01,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:53:01,073 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:01,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:53:01,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661992046] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:01,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:01,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2025-02-05 14:53:01,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491552431] [2025-02-05 14:53:01,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:01,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-05 14:53:01,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:01,157 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-05 14:53:01,157 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2025-02-05 14:53:01,158 INFO L87 Difference]: Start difference. First operand 42 states and 63 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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 14:53:05,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-02-05 14:53:06,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-02-05 14:53:06,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:06,764 INFO L93 Difference]: Finished difference Result 60 states and 88 transitions. [2025-02-05 14:53:06,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-05 14:53:06,764 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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 12 [2025-02-05 14:53:06,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:06,765 INFO L225 Difference]: With dead ends: 60 [2025-02-05 14:53:06,765 INFO L226 Difference]: Without dead ends: 51 [2025-02-05 14:53:06,765 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2025-02-05 14:53:06,765 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:06,765 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 39 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2025-02-05 14:53:06,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2025-02-05 14:53:06,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2025-02-05 14:53:06,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.5454545454545454) internal successors, (68), 44 states have internal predecessors, (68), 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 14:53:06,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 68 transitions. [2025-02-05 14:53:06,774 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 68 transitions. Word has length 12 [2025-02-05 14:53:06,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:06,774 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 68 transitions. [2025-02-05 14:53:06,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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 14:53:06,774 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 68 transitions. [2025-02-05 14:53:06,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-02-05 14:53:06,775 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:06,775 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:06,781 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 14:53:06,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:06,979 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:06,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:06,980 INFO L85 PathProgramCache]: Analyzing trace with hash 137990843, now seen corresponding path program 2 times [2025-02-05 14:53:06,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:06,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129074141] [2025-02-05 14:53:06,980 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:53:06,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:06,984 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-02-05 14:53:06,991 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 12 of 12 statements. [2025-02-05 14:53:06,991 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:53:06,991 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:07,056 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 14:53:07,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:07,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129074141] [2025-02-05 14:53:07,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129074141] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:07,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261890043] [2025-02-05 14:53:07,057 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:53:07,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:07,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:07,058 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 14:53:07,060 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 14:53:07,096 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-02-05 14:53:07,103 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 12 of 12 statements. [2025-02-05 14:53:07,103 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:53:07,104 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:07,104 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-05 14:53:07,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:07,120 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 14:53:07,120 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:07,199 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 14:53:07,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261890043] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:07,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:07,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2025-02-05 14:53:07,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751690155] [2025-02-05 14:53:07,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:07,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-05 14:53:07,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:07,200 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-05 14:53:07,200 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2025-02-05 14:53:07,200 INFO L87 Difference]: Start difference. First operand 45 states and 68 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 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 14:53:07,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:07,761 INFO L93 Difference]: Finished difference Result 164 states and 288 transitions. [2025-02-05 14:53:07,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-02-05 14:53:07,761 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 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) Word has length 12 [2025-02-05 14:53:07,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:07,762 INFO L225 Difference]: With dead ends: 164 [2025-02-05 14:53:07,762 INFO L226 Difference]: Without dead ends: 151 [2025-02-05 14:53:07,763 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 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 14:53:07,763 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 161 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:07,763 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 54 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 14:53:07,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2025-02-05 14:53:07,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 77. [2025-02-05 14:53:07,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.513157894736842) internal successors, (115), 76 states have internal predecessors, (115), 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 14:53:07,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 115 transitions. [2025-02-05 14:53:07,785 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 115 transitions. Word has length 12 [2025-02-05 14:53:07,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:07,785 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 115 transitions. [2025-02-05 14:53:07,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 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 14:53:07,785 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 115 transitions. [2025-02-05 14:53:07,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-02-05 14:53:07,785 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:07,785 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:07,791 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 14:53:07,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-02-05 14:53:07,986 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:07,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:07,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1334765064, now seen corresponding path program 2 times [2025-02-05 14:53:07,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:07,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107448830] [2025-02-05 14:53:07,987 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:53:07,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:07,990 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-02-05 14:53:07,996 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-02-05 14:53:07,996 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:53:07,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:08,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:53:08,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:08,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107448830] [2025-02-05 14:53:08,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107448830] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:08,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943963252] [2025-02-05 14:53:08,084 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:53:08,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:08,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:08,088 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 14:53:08,091 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 14:53:08,112 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-02-05 14:53:08,121 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-02-05 14:53:08,121 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:53:08,121 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:08,121 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-05 14:53:08,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:08,208 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 14:53:08,208 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:08,343 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 14:53:08,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943963252] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:08,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:08,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-02-05 14:53:08,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876838317] [2025-02-05 14:53:08,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:08,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-05 14:53:08,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:08,344 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-05 14:53:08,344 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2025-02-05 14:53:08,344 INFO L87 Difference]: Start difference. First operand 77 states and 115 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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 14:53:09,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:09,027 INFO L93 Difference]: Finished difference Result 176 states and 265 transitions. [2025-02-05 14:53:09,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-05 14:53:09,030 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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 14 [2025-02-05 14:53:09,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:09,031 INFO L225 Difference]: With dead ends: 176 [2025-02-05 14:53:09,031 INFO L226 Difference]: Without dead ends: 160 [2025-02-05 14:53:09,031 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2025-02-05 14:53:09,032 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 72 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:09,032 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 139 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 14:53:09,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2025-02-05 14:53:09,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 120. [2025-02-05 14:53:09,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.5630252100840336) internal successors, (186), 119 states have internal predecessors, (186), 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 14:53:09,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 186 transitions. [2025-02-05 14:53:09,052 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 186 transitions. Word has length 14 [2025-02-05 14:53:09,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:09,052 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 186 transitions. [2025-02-05 14:53:09,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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 14:53:09,053 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 186 transitions. [2025-02-05 14:53:09,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-02-05 14:53:09,053 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:09,053 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:09,061 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 14:53:09,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:09,258 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:09,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:09,259 INFO L85 PathProgramCache]: Analyzing trace with hash 653003322, now seen corresponding path program 2 times [2025-02-05 14:53:09,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:09,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121072792] [2025-02-05 14:53:09,259 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:53:09,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:09,263 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-02-05 14:53:09,266 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-02-05 14:53:09,266 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:53:09,266 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 14:53:09,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:09,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121072792] [2025-02-05 14:53:09,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121072792] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:09,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223764978] [2025-02-05 14:53:09,332 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:53:09,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:09,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:09,338 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 14:53:09,339 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 14:53:09,356 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-02-05 14:53:09,363 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-02-05 14:53:09,363 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:53:09,363 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:09,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 14:53:09,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 14:53:09,413 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 14:53:09,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223764978] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:09,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:09,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 12 [2025-02-05 14:53:09,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930703824] [2025-02-05 14:53:09,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:09,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 14:53:09,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:09,467 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 14:53:09,468 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-02-05 14:53:09,468 INFO L87 Difference]: Start difference. First operand 120 states and 186 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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 14:53:09,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:09,613 INFO L93 Difference]: Finished difference Result 184 states and 262 transitions. [2025-02-05 14:53:09,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-05 14:53:09,613 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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 14 [2025-02-05 14:53:09,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:09,614 INFO L225 Difference]: With dead ends: 184 [2025-02-05 14:53:09,614 INFO L226 Difference]: Without dead ends: 168 [2025-02-05 14:53:09,614 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2025-02-05 14:53:09,615 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:09,615 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 34 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:53:09,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2025-02-05 14:53:09,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 116. [2025-02-05 14:53:09,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.5478260869565217) internal successors, (178), 115 states have internal predecessors, (178), 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 14:53:09,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 178 transitions. [2025-02-05 14:53:09,651 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 178 transitions. Word has length 14 [2025-02-05 14:53:09,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:09,655 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 178 transitions. [2025-02-05 14:53:09,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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 14:53:09,656 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 178 transitions. [2025-02-05 14:53:09,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-02-05 14:53:09,656 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:09,656 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:09,666 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 14:53:09,856 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,SelfDestructingSolverStorable7 [2025-02-05 14:53:09,857 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:09,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:09,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1289144773, now seen corresponding path program 3 times [2025-02-05 14:53:09,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:09,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710987927] [2025-02-05 14:53:09,861 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:53:09,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:09,865 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-02-05 14:53:09,879 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-05 14:53:09,882 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-05 14:53:09,882 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:10,173 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 14:53:10,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:10,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710987927] [2025-02-05 14:53:10,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710987927] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:10,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84827275] [2025-02-05 14:53:10,173 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:53:10,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:10,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:10,177 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 14:53:10,178 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 14:53:10,196 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-02-05 14:53:10,213 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-05 14:53:10,213 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-05 14:53:10,213 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:10,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-02-05 14:53:10,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:53:10,504 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:10,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:53:10,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84827275] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:10,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:10,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 27 [2025-02-05 14:53:10,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106310787] [2025-02-05 14:53:10,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:10,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-05 14:53:10,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:10,729 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-05 14:53:10,730 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2025-02-05 14:53:10,730 INFO L87 Difference]: Start difference. First operand 116 states and 178 transitions. Second operand has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 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 14:53:11,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:11,722 INFO L93 Difference]: Finished difference Result 214 states and 304 transitions. [2025-02-05 14:53:11,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-02-05 14:53:11,722 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 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 16 [2025-02-05 14:53:11,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:11,723 INFO L225 Difference]: With dead ends: 214 [2025-02-05 14:53:11,723 INFO L226 Difference]: Without dead ends: 198 [2025-02-05 14:53:11,724 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=356, Invalid=1714, Unknown=0, NotChecked=0, Total=2070 [2025-02-05 14:53:11,724 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:11,724 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 101 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 14:53:11,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2025-02-05 14:53:11,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 145. [2025-02-05 14:53:11,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.5416666666666667) internal successors, (222), 144 states have internal predecessors, (222), 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 14:53:11,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 222 transitions. [2025-02-05 14:53:11,783 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 222 transitions. Word has length 16 [2025-02-05 14:53:11,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:11,783 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 222 transitions. [2025-02-05 14:53:11,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 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 14:53:11,783 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 222 transitions. [2025-02-05 14:53:11,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-02-05 14:53:11,784 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:11,784 INFO L218 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:11,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-05 14:53:11,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:11,988 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:11,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:11,989 INFO L85 PathProgramCache]: Analyzing trace with hash -347565522, now seen corresponding path program 4 times [2025-02-05 14:53:11,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:11,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508592741] [2025-02-05 14:53:11,989 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:53:11,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:11,995 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 17 statements into 2 equivalence classes. [2025-02-05 14:53:11,999 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-02-05 14:53:11,999 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:53:11,999 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:12,135 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-05 14:53:12,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:12,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508592741] [2025-02-05 14:53:12,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508592741] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:12,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050952292] [2025-02-05 14:53:12,135 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:53:12,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:12,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:12,139 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 14:53:12,140 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 14:53:12,163 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 17 statements into 2 equivalence classes. [2025-02-05 14:53:12,171 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-02-05 14:53:12,171 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:53:12,171 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:12,172 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-05 14:53:12,172 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:12,190 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-05 14:53:12,190 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:12,323 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-05 14:53:12,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050952292] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:12,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:12,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2025-02-05 14:53:12,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402354774] [2025-02-05 14:53:12,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:12,324 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-05 14:53:12,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:12,324 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-05 14:53:12,324 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2025-02-05 14:53:12,324 INFO L87 Difference]: Start difference. First operand 145 states and 222 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 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 14:53:14,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:14,418 INFO L93 Difference]: Finished difference Result 435 states and 721 transitions. [2025-02-05 14:53:14,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2025-02-05 14:53:14,418 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 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 17 [2025-02-05 14:53:14,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:14,423 INFO L225 Difference]: With dead ends: 435 [2025-02-05 14:53:14,423 INFO L226 Difference]: Without dead ends: 409 [2025-02-05 14:53:14,429 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1999 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1570, Invalid=4282, Unknown=0, NotChecked=0, Total=5852 [2025-02-05 14:53:14,429 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 274 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:14,429 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 106 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-05 14:53:14,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2025-02-05 14:53:14,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 181. [2025-02-05 14:53:14,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.5444444444444445) internal successors, (278), 180 states have internal predecessors, (278), 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 14:53:14,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 278 transitions. [2025-02-05 14:53:14,501 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 278 transitions. Word has length 17 [2025-02-05 14:53:14,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:14,501 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 278 transitions. [2025-02-05 14:53:14,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 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 14:53:14,501 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 278 transitions. [2025-02-05 14:53:14,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-02-05 14:53:14,501 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:14,501 INFO L218 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:14,507 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 14:53:14,702 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:14,702 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:14,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:14,703 INFO L85 PathProgramCache]: Analyzing trace with hash 276086330, now seen corresponding path program 5 times [2025-02-05 14:53:14,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:14,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200173513] [2025-02-05 14:53:14,703 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 14:53:14,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:14,708 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 4 equivalence classes. [2025-02-05 14:53:14,714 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 18 of 18 statements. [2025-02-05 14:53:14,714 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-05 14:53:14,714 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:14,772 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-05 14:53:14,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:14,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200173513] [2025-02-05 14:53:14,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200173513] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:14,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346173739] [2025-02-05 14:53:14,773 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 14:53:14,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:14,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:14,775 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 14:53:14,776 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 14:53:14,800 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 4 equivalence classes. [2025-02-05 14:53:14,816 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 18 of 18 statements. [2025-02-05 14:53:14,816 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-05 14:53:14,816 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:14,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-05 14:53:14,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-05 14:53:14,858 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:14,951 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-05 14:53:14,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346173739] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:14,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:14,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2025-02-05 14:53:14,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504539528] [2025-02-05 14:53:14,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:14,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-05 14:53:14,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:14,952 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-05 14:53:14,952 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2025-02-05 14:53:14,952 INFO L87 Difference]: Start difference. First operand 181 states and 278 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 14:53:15,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:15,181 INFO L93 Difference]: Finished difference Result 255 states and 370 transitions. [2025-02-05 14:53:15,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-05 14:53:15,182 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 18 [2025-02-05 14:53:15,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:15,183 INFO L225 Difference]: With dead ends: 255 [2025-02-05 14:53:15,183 INFO L226 Difference]: Without dead ends: 222 [2025-02-05 14:53:15,184 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2025-02-05 14:53:15,184 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:15,184 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 36 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:53:15,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2025-02-05 14:53:15,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 176. [2025-02-05 14:53:15,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.56) internal successors, (273), 175 states have internal predecessors, (273), 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 14:53:15,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 273 transitions. [2025-02-05 14:53:15,240 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 273 transitions. Word has length 18 [2025-02-05 14:53:15,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:15,240 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 273 transitions. [2025-02-05 14:53:15,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 14:53:15,241 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 273 transitions. [2025-02-05 14:53:15,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-02-05 14:53:15,241 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:15,241 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:15,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-05 14:53:15,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:15,442 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:15,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:15,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1695435512, now seen corresponding path program 6 times [2025-02-05 14:53:15,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:15,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355559697] [2025-02-05 14:53:15,443 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 14:53:15,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:15,448 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 3 equivalence classes. [2025-02-05 14:53:15,452 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 18 of 18 statements. [2025-02-05 14:53:15,452 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-05 14:53:15,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-05 14:53:15,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:15,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355559697] [2025-02-05 14:53:15,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355559697] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:15,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657168379] [2025-02-05 14:53:15,533 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 14:53:15,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:15,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:15,536 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 14:53:15,537 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 14:53:15,555 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 3 equivalence classes. [2025-02-05 14:53:15,563 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 18 of 18 statements. [2025-02-05 14:53:15,563 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-05 14:53:15,563 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:15,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-05 14:53:15,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-05 14:53:15,596 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:15,677 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-05 14:53:15,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657168379] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:15,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:15,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 16 [2025-02-05 14:53:15,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915105015] [2025-02-05 14:53:15,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:15,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-05 14:53:15,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:15,678 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-05 14:53:15,678 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2025-02-05 14:53:15,678 INFO L87 Difference]: Start difference. First operand 176 states and 273 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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 14:53:15,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:15,950 INFO L93 Difference]: Finished difference Result 250 states and 358 transitions. [2025-02-05 14:53:15,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-05 14:53:15,950 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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 18 [2025-02-05 14:53:15,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:15,951 INFO L225 Difference]: With dead ends: 250 [2025-02-05 14:53:15,951 INFO L226 Difference]: Without dead ends: 224 [2025-02-05 14:53:15,952 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2025-02-05 14:53:15,952 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:15,952 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 42 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:53:15,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2025-02-05 14:53:16,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 170. [2025-02-05 14:53:16,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.544378698224852) internal successors, (261), 169 states have internal predecessors, (261), 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 14:53:16,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 261 transitions. [2025-02-05 14:53:16,003 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 261 transitions. Word has length 18 [2025-02-05 14:53:16,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:16,004 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 261 transitions. [2025-02-05 14:53:16,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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 14:53:16,005 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 261 transitions. [2025-02-05 14:53:16,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-02-05 14:53:16,008 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:16,008 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:16,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-05 14:53:16,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-05 14:53:16,209 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:16,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:16,209 INFO L85 PathProgramCache]: Analyzing trace with hash 329165343, now seen corresponding path program 7 times [2025-02-05 14:53:16,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:16,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471061311] [2025-02-05 14:53:16,209 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 14:53:16,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:16,214 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-05 14:53:16,221 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-05 14:53:16,221 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:53:16,221 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 14:53:16,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:16,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471061311] [2025-02-05 14:53:16,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471061311] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:16,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958057330] [2025-02-05 14:53:16,589 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 14:53:16,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:16,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:16,590 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 14:53:16,592 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 14:53:16,613 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-05 14:53:16,628 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-05 14:53:16,628 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:53:16,628 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:16,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-02-05 14:53:16,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:16,892 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 14:53:16,892 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:17,188 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 14:53:17,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958057330] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:17,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:17,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 28 [2025-02-05 14:53:17,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317248384] [2025-02-05 14:53:17,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:17,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-02-05 14:53:17,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:17,190 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-02-05 14:53:17,191 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2025-02-05 14:53:17,191 INFO L87 Difference]: Start difference. First operand 170 states and 261 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:53:18,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:18,176 INFO L93 Difference]: Finished difference Result 269 states and 380 transitions. [2025-02-05 14:53:18,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-02-05 14:53:18,176 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2025-02-05 14:53:18,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:18,177 INFO L225 Difference]: With dead ends: 269 [2025-02-05 14:53:18,177 INFO L226 Difference]: Without dead ends: 248 [2025-02-05 14:53:18,178 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=251, Invalid=1471, Unknown=0, NotChecked=0, Total=1722 [2025-02-05 14:53:18,179 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 17 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:18,179 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 68 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 14:53:18,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2025-02-05 14:53:18,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 202. [2025-02-05 14:53:18,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.5174129353233832) internal successors, (305), 201 states have internal predecessors, (305), 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 14:53:18,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 305 transitions. [2025-02-05 14:53:18,230 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 305 transitions. Word has length 20 [2025-02-05 14:53:18,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:18,230 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 305 transitions. [2025-02-05 14:53:18,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:53:18,231 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 305 transitions. [2025-02-05 14:53:18,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-02-05 14:53:18,231 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:18,231 INFO L218 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:18,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-05 14:53:18,431 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,SelfDestructingSolverStorable12 [2025-02-05 14:53:18,432 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:18,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:18,432 INFO L85 PathProgramCache]: Analyzing trace with hash -159048915, now seen corresponding path program 8 times [2025-02-05 14:53:18,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:18,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184871261] [2025-02-05 14:53:18,432 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:53:18,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:18,437 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-02-05 14:53:18,444 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-05 14:53:18,444 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:53:18,444 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-05 14:53:18,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:18,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184871261] [2025-02-05 14:53:18,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184871261] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:18,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696611344] [2025-02-05 14:53:18,682 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:53:18,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:18,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:18,686 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 14:53:18,693 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 14:53:18,712 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-02-05 14:53:18,722 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-05 14:53:18,722 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:53:18,722 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:18,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-05 14:53:18,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:18,857 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 14:53:18,857 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:19,012 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 14:53:19,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696611344] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:19,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:19,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2025-02-05 14:53:19,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229102052] [2025-02-05 14:53:19,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:19,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-05 14:53:19,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:19,013 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-05 14:53:19,013 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2025-02-05 14:53:19,013 INFO L87 Difference]: Start difference. First operand 202 states and 305 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 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 14:53:20,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:20,158 INFO L93 Difference]: Finished difference Result 432 states and 642 transitions. [2025-02-05 14:53:20,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-02-05 14:53:20,158 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 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 21 [2025-02-05 14:53:20,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:20,160 INFO L225 Difference]: With dead ends: 432 [2025-02-05 14:53:20,160 INFO L226 Difference]: Without dead ends: 404 [2025-02-05 14:53:20,161 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=456, Invalid=1896, Unknown=0, NotChecked=0, Total=2352 [2025-02-05 14:53:20,165 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 154 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:20,165 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 291 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-05 14:53:20,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2025-02-05 14:53:20,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 262. [2025-02-05 14:53:20,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.5363984674329503) internal successors, (401), 261 states have internal predecessors, (401), 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 14:53:20,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 401 transitions. [2025-02-05 14:53:20,265 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 401 transitions. Word has length 21 [2025-02-05 14:53:20,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:20,265 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 401 transitions. [2025-02-05 14:53:20,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 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 14:53:20,265 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 401 transitions. [2025-02-05 14:53:20,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-02-05 14:53:20,266 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:20,266 INFO L218 NwaCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:20,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-05 14:53:20,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:20,466 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:20,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:20,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1221158090, now seen corresponding path program 3 times [2025-02-05 14:53:20,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:20,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691057713] [2025-02-05 14:53:20,467 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:53:20,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:20,471 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 8 equivalence classes. [2025-02-05 14:53:20,481 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 21 of 21 statements. [2025-02-05 14:53:20,481 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-02-05 14:53:20,481 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:20,677 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:53:20,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:20,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691057713] [2025-02-05 14:53:20,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691057713] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:20,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948076492] [2025-02-05 14:53:20,677 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:53:20,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:20,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:20,679 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 14:53:20,681 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 14:53:20,700 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 8 equivalence classes. [2025-02-05 14:53:20,714 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 21 of 21 statements. [2025-02-05 14:53:20,714 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-02-05 14:53:20,714 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:20,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-02-05 14:53:20,715 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:20,749 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:53:20,749 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:53:21,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948076492] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:21,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:21,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2025-02-05 14:53:21,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981028747] [2025-02-05 14:53:21,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:21,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-02-05 14:53:21,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:21,071 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-02-05 14:53:21,071 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2025-02-05 14:53:21,071 INFO L87 Difference]: Start difference. First operand 262 states and 401 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 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 14:53:26,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:26,676 INFO L93 Difference]: Finished difference Result 1260 states and 2055 transitions. [2025-02-05 14:53:26,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2025-02-05 14:53:26,676 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 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 21 [2025-02-05 14:53:26,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:26,680 INFO L225 Difference]: With dead ends: 1260 [2025-02-05 14:53:26,680 INFO L226 Difference]: Without dead ends: 1210 [2025-02-05 14:53:26,681 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1720 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2101, Invalid=4705, Unknown=0, NotChecked=0, Total=6806 [2025-02-05 14:53:26,682 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 758 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 1338 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 1338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:26,682 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [758 Valid, 210 Invalid, 1864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 1338 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2025-02-05 14:53:26,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2025-02-05 14:53:26,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 367. [2025-02-05 14:53:26,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 1.5437158469945356) internal successors, (565), 366 states have internal predecessors, (565), 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 14:53:26,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 565 transitions. [2025-02-05 14:53:26,822 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 565 transitions. Word has length 21 [2025-02-05 14:53:26,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:26,822 INFO L471 AbstractCegarLoop]: Abstraction has 367 states and 565 transitions. [2025-02-05 14:53:26,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 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 14:53:26,822 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 565 transitions. [2025-02-05 14:53:26,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-02-05 14:53:26,822 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:26,822 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:26,831 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 14:53:27,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:27,023 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:27,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:27,024 INFO L85 PathProgramCache]: Analyzing trace with hash 544528058, now seen corresponding path program 9 times [2025-02-05 14:53:27,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:27,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110101375] [2025-02-05 14:53:27,024 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:53:27,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:27,031 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 3 equivalence classes. [2025-02-05 14:53:27,046 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 22 of 22 statements. [2025-02-05 14:53:27,046 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 14:53:27,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:27,171 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-05 14:53:27,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:27,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110101375] [2025-02-05 14:53:27,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110101375] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:27,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553953890] [2025-02-05 14:53:27,171 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:53:27,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:27,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:27,173 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 14:53:27,175 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 14:53:27,196 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 3 equivalence classes. [2025-02-05 14:53:27,207 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 22 of 22 statements. [2025-02-05 14:53:27,207 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 14:53:27,207 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:27,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-05 14:53:27,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:27,239 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-05 14:53:27,239 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:27,356 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-05 14:53:27,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553953890] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:27,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:27,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2025-02-05 14:53:27,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102513287] [2025-02-05 14:53:27,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:27,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-05 14:53:27,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:27,357 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-05 14:53:27,357 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2025-02-05 14:53:27,357 INFO L87 Difference]: Start difference. First operand 367 states and 565 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 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 14:53:29,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:29,521 INFO L93 Difference]: Finished difference Result 721 states and 945 transitions. [2025-02-05 14:53:29,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2025-02-05 14:53:29,522 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 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 14:53:29,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:29,525 INFO L225 Difference]: With dead ends: 721 [2025-02-05 14:53:29,525 INFO L226 Difference]: Without dead ends: 683 [2025-02-05 14:53:29,526 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2292 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1267, Invalid=5705, Unknown=0, NotChecked=0, Total=6972 [2025-02-05 14:53:29,527 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 190 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:29,527 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 117 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 14:53:29,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2025-02-05 14:53:29,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 367. [2025-02-05 14:53:29,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 1.5218579234972678) internal successors, (557), 366 states have internal predecessors, (557), 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 14:53:29,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 557 transitions. [2025-02-05 14:53:29,676 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 557 transitions. Word has length 22 [2025-02-05 14:53:29,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:29,677 INFO L471 AbstractCegarLoop]: Abstraction has 367 states and 557 transitions. [2025-02-05 14:53:29,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 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 14:53:29,677 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 557 transitions. [2025-02-05 14:53:29,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-02-05 14:53:29,677 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:29,677 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:29,682 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 14:53:29,881 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,SelfDestructingSolverStorable15 [2025-02-05 14:53:29,881 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:29,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:29,881 INFO L85 PathProgramCache]: Analyzing trace with hash -70072965, now seen corresponding path program 10 times [2025-02-05 14:53:29,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:29,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067437884] [2025-02-05 14:53:29,881 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:53:29,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:29,884 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 24 statements into 2 equivalence classes. [2025-02-05 14:53:29,893 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-02-05 14:53:29,893 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:53:29,893 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:30,295 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 14:53:30,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:30,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067437884] [2025-02-05 14:53:30,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067437884] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:30,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189657136] [2025-02-05 14:53:30,295 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:53:30,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:30,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:30,297 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 14:53:30,309 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 14:53:30,338 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 24 statements into 2 equivalence classes. [2025-02-05 14:53:30,378 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-02-05 14:53:30,378 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:53:30,378 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:30,379 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 57 conjuncts are in the unsatisfiable core [2025-02-05 14:53:30,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:30,876 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:53:30,876 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:53:31,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189657136] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:31,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:31,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 15] total 43 [2025-02-05 14:53:31,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136490149] [2025-02-05 14:53:31,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:31,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-02-05 14:53:31,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:31,420 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-02-05 14:53:31,420 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1485, Unknown=0, NotChecked=0, Total=1806 [2025-02-05 14:53:31,420 INFO L87 Difference]: Start difference. First operand 367 states and 557 transitions. Second operand has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 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 14:53:33,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:33,761 INFO L93 Difference]: Finished difference Result 447 states and 644 transitions. [2025-02-05 14:53:33,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2025-02-05 14:53:33,762 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 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 24 [2025-02-05 14:53:33,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:33,763 INFO L225 Difference]: With dead ends: 447 [2025-02-05 14:53:33,763 INFO L226 Difference]: Without dead ends: 434 [2025-02-05 14:53:33,764 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1529 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=850, Invalid=4262, Unknown=0, NotChecked=0, Total=5112 [2025-02-05 14:53:33,765 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:33,765 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 124 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-05 14:53:33,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2025-02-05 14:53:33,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 388. [2025-02-05 14:53:33,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 1.5012919896640826) internal successors, (581), 387 states have internal predecessors, (581), 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 14:53:33,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 581 transitions. [2025-02-05 14:53:33,942 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 581 transitions. Word has length 24 [2025-02-05 14:53:33,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:33,943 INFO L471 AbstractCegarLoop]: Abstraction has 388 states and 581 transitions. [2025-02-05 14:53:33,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 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 14:53:33,943 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 581 transitions. [2025-02-05 14:53:33,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-02-05 14:53:33,944 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:33,944 INFO L218 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:33,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-05 14:53:34,144 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,SelfDestructingSolverStorable16 [2025-02-05 14:53:34,144 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:34,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:34,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1219513006, now seen corresponding path program 11 times [2025-02-05 14:53:34,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:34,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280246927] [2025-02-05 14:53:34,145 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 14:53:34,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:34,149 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 25 statements into 8 equivalence classes. [2025-02-05 14:53:34,160 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 25 of 25 statements. [2025-02-05 14:53:34,160 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-02-05 14:53:34,160 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:34,358 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-05 14:53:34,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:34,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280246927] [2025-02-05 14:53:34,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280246927] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:34,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371946167] [2025-02-05 14:53:34,358 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 14:53:34,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:34,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:34,360 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 14:53:34,361 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 14:53:34,380 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 25 statements into 8 equivalence classes. [2025-02-05 14:53:34,409 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 25 of 25 statements. [2025-02-05 14:53:34,409 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-02-05 14:53:34,409 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:34,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-02-05 14:53:34,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:34,443 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-05 14:53:34,443 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:34,850 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-05 14:53:34,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371946167] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:34,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:34,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2025-02-05 14:53:34,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034704422] [2025-02-05 14:53:34,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:34,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-02-05 14:53:34,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:34,851 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-02-05 14:53:34,852 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2025-02-05 14:53:34,852 INFO L87 Difference]: Start difference. First operand 388 states and 581 transitions. Second operand has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 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 14:53:49,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:49,093 INFO L93 Difference]: Finished difference Result 1301 states and 2035 transitions. [2025-02-05 14:53:49,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2025-02-05 14:53:49,093 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 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 25 [2025-02-05 14:53:49,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:49,097 INFO L225 Difference]: With dead ends: 1301 [2025-02-05 14:53:49,097 INFO L226 Difference]: Without dead ends: 1268 [2025-02-05 14:53:49,100 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9740 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=6878, Invalid=18244, Unknown=0, NotChecked=0, Total=25122 [2025-02-05 14:53:49,101 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 1230 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 1755 mSolverCounterSat, 852 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1230 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 2607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 852 IncrementalHoareTripleChecker+Valid, 1755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:49,101 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1230 Valid, 279 Invalid, 2607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [852 Valid, 1755 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2025-02-05 14:53:49,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2025-02-05 14:53:49,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 442. [2025-02-05 14:53:49,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 1.5170068027210883) internal successors, (669), 441 states have internal predecessors, (669), 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 14:53:49,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 669 transitions. [2025-02-05 14:53:49,304 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 669 transitions. Word has length 25 [2025-02-05 14:53:49,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:49,304 INFO L471 AbstractCegarLoop]: Abstraction has 442 states and 669 transitions. [2025-02-05 14:53:49,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 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 14:53:49,304 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 669 transitions. [2025-02-05 14:53:49,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-02-05 14:53:49,306 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:49,306 INFO L218 NwaCegarLoop]: trace histogram [8, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:49,311 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 14:53:49,506 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,SelfDestructingSolverStorable17 [2025-02-05 14:53:49,507 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:49,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:49,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1486191717, now seen corresponding path program 12 times [2025-02-05 14:53:49,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:49,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176850698] [2025-02-05 14:53:49,507 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 14:53:49,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:49,511 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 5 equivalence classes. [2025-02-05 14:53:49,523 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 26 of 26 statements. [2025-02-05 14:53:49,524 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-05 14:53:49,524 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:49,663 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-02-05 14:53:49,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:49,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176850698] [2025-02-05 14:53:49,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176850698] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:49,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583092095] [2025-02-05 14:53:49,664 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 14:53:49,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:49,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:49,666 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 14:53:49,669 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 14:53:49,690 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 5 equivalence classes. [2025-02-05 14:53:49,710 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 26 of 26 statements. [2025-02-05 14:53:49,710 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-05 14:53:49,710 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:49,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-02-05 14:53:49,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:49,762 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-05 14:53:49,763 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:49,966 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-05 14:53:49,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583092095] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:49,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:49,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 29 [2025-02-05 14:53:49,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179264271] [2025-02-05 14:53:49,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:49,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-05 14:53:49,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:49,968 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-05 14:53:49,969 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2025-02-05 14:53:49,969 INFO L87 Difference]: Start difference. First operand 442 states and 669 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 14:53:50,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:50,876 INFO L93 Difference]: Finished difference Result 761 states and 1007 transitions. [2025-02-05 14:53:50,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-02-05 14:53:50,876 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 26 [2025-02-05 14:53:50,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:50,878 INFO L225 Difference]: With dead ends: 761 [2025-02-05 14:53:50,879 INFO L226 Difference]: Without dead ends: 711 [2025-02-05 14:53:50,879 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2025-02-05 14:53:50,879 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 54 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:50,879 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 76 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 14:53:50,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2025-02-05 14:53:51,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 420. [2025-02-05 14:53:51,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 1.532219570405728) internal successors, (642), 419 states have internal predecessors, (642), 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 14:53:51,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 642 transitions. [2025-02-05 14:53:51,080 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 642 transitions. Word has length 26 [2025-02-05 14:53:51,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:51,080 INFO L471 AbstractCegarLoop]: Abstraction has 420 states and 642 transitions. [2025-02-05 14:53:51,080 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 14:53:51,081 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 642 transitions. [2025-02-05 14:53:51,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-02-05 14:53:51,081 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:51,081 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:51,087 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 14:53:51,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:51,285 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:51,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:51,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1866942600, now seen corresponding path program 13 times [2025-02-05 14:53:51,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:51,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092899197] [2025-02-05 14:53:51,286 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 14:53:51,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:51,289 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-05 14:53:51,293 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-05 14:53:51,293 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:53:51,293 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:51,421 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-05 14:53:51,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:51,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092899197] [2025-02-05 14:53:51,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092899197] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:51,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077656467] [2025-02-05 14:53:51,422 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 14:53:51,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:51,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:51,424 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 14:53:51,426 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 14:53:51,446 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-05 14:53:51,457 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-05 14:53:51,457 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:53:51,457 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:51,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-02-05 14:53:51,458 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:51,527 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-05 14:53:51,527 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:51,720 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-05 14:53:51,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077656467] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:51,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:51,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 28 [2025-02-05 14:53:51,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298659206] [2025-02-05 14:53:51,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:51,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-02-05 14:53:51,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:51,721 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-02-05 14:53:51,721 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2025-02-05 14:53:51,721 INFO L87 Difference]: Start difference. First operand 420 states and 642 transitions. Second operand has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 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 14:53:52,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:52,683 INFO L93 Difference]: Finished difference Result 617 states and 857 transitions. [2025-02-05 14:53:52,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-02-05 14:53:52,684 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 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 14:53:52,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:52,685 INFO L225 Difference]: With dead ends: 617 [2025-02-05 14:53:52,685 INFO L226 Difference]: Without dead ends: 536 [2025-02-05 14:53:52,686 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=218, Invalid=1188, Unknown=0, NotChecked=0, Total=1406 [2025-02-05 14:53:52,686 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 27 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:52,686 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 67 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 14:53:52,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2025-02-05 14:53:52,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 403. [2025-02-05 14:53:52,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.5099502487562189) internal successors, (607), 402 states have internal predecessors, (607), 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 14:53:52,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 607 transitions. [2025-02-05 14:53:52,882 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 607 transitions. Word has length 26 [2025-02-05 14:53:52,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:52,882 INFO L471 AbstractCegarLoop]: Abstraction has 403 states and 607 transitions. [2025-02-05 14:53:52,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 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 14:53:52,882 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 607 transitions. [2025-02-05 14:53:52,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-02-05 14:53:52,883 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:52,883 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:52,892 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 14:53:53,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:53,087 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:53,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:53,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1514666017, now seen corresponding path program 14 times [2025-02-05 14:53:53,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:53,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180624380] [2025-02-05 14:53:53,088 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:53:53,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:53,091 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-05 14:53:53,104 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-05 14:53:53,104 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:53:53,104 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:53,435 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-05 14:53:53,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:53,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180624380] [2025-02-05 14:53:53,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180624380] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:53,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090745644] [2025-02-05 14:53:53,436 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:53:53,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:53,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:53,437 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 14:53:53,439 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 14:53:53,460 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-05 14:53:53,500 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-05 14:53:53,500 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:53:53,500 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:53,501 WARN L254 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 72 conjuncts are in the unsatisfiable core [2025-02-05 14:53:53,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:54,091 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:53:54,092 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:53:55,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090745644] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:55,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:55,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 25] total 57 [2025-02-05 14:53:55,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572247771] [2025-02-05 14:53:55,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:55,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-02-05 14:53:55,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:55,149 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-02-05 14:53:55,150 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=2894, Unknown=0, NotChecked=0, Total=3192 [2025-02-05 14:53:55,150 INFO L87 Difference]: Start difference. First operand 403 states and 607 transitions. Second operand has 57 states, 57 states have (on average 1.263157894736842) internal successors, (72), 57 states have internal predecessors, (72), 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 14:54:01,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:01,784 INFO L93 Difference]: Finished difference Result 676 states and 893 transitions. [2025-02-05 14:54:01,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2025-02-05 14:54:01,784 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.263157894736842) internal successors, (72), 57 states have internal predecessors, (72), 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 14:54:01,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:01,786 INFO L225 Difference]: With dead ends: 676 [2025-02-05 14:54:01,786 INFO L226 Difference]: Without dead ends: 661 [2025-02-05 14:54:01,787 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5189 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=2390, Invalid=15166, Unknown=0, NotChecked=0, Total=17556 [2025-02-05 14:54:01,787 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 186 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 1794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:01,787 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 236 Invalid, 1794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 1375 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-02-05 14:54:01,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2025-02-05 14:54:02,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 428. [2025-02-05 14:54:02,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 1.4894613583138174) internal successors, (636), 427 states have internal predecessors, (636), 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 14:54:02,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 636 transitions. [2025-02-05 14:54:02,040 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 636 transitions. Word has length 28 [2025-02-05 14:54:02,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:02,040 INFO L471 AbstractCegarLoop]: Abstraction has 428 states and 636 transitions. [2025-02-05 14:54:02,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.263157894736842) internal successors, (72), 57 states have internal predecessors, (72), 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 14:54:02,040 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 636 transitions. [2025-02-05 14:54:02,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-02-05 14:54:02,041 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:02,041 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:54:02,047 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 14:54:02,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:02,245 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:02,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:02,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1385613899, now seen corresponding path program 15 times [2025-02-05 14:54:02,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:02,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646959690] [2025-02-05 14:54:02,245 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:54:02,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:02,249 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 5 equivalence classes. [2025-02-05 14:54:02,267 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 29 of 29 statements. [2025-02-05 14:54:02,267 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-05 14:54:02,267 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:02,445 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-05 14:54:02,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:02,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646959690] [2025-02-05 14:54:02,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646959690] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:02,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824622553] [2025-02-05 14:54:02,446 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:54:02,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:02,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:02,450 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 14:54:02,451 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 14:54:02,475 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 5 equivalence classes. [2025-02-05 14:54:02,495 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 29 of 29 statements. [2025-02-05 14:54:02,495 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-05 14:54:02,495 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:02,496 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-02-05 14:54:02,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-05 14:54:02,777 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-05 14:54:03,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824622553] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:03,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:03,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 25 [2025-02-05 14:54:03,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869755395] [2025-02-05 14:54:03,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:03,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-05 14:54:03,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:03,057 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-05 14:54:03,057 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2025-02-05 14:54:03,057 INFO L87 Difference]: Start difference. First operand 428 states and 636 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:05,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:05,224 INFO L93 Difference]: Finished difference Result 532 states and 754 transitions. [2025-02-05 14:54:05,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2025-02-05 14:54:05,224 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2025-02-05 14:54:05,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:05,226 INFO L225 Difference]: With dead ends: 532 [2025-02-05 14:54:05,226 INFO L226 Difference]: Without dead ends: 483 [2025-02-05 14:54:05,228 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 44 SyntacticMatches, 14 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=540, Invalid=4572, Unknown=0, NotChecked=0, Total=5112 [2025-02-05 14:54:05,231 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 99 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:05,231 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 216 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-02-05 14:54:05,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2025-02-05 14:54:05,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 445. [2025-02-05 14:54:05,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 1.4594594594594594) internal successors, (648), 444 states have internal predecessors, (648), 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 14:54:05,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 648 transitions. [2025-02-05 14:54:05,508 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 648 transitions. Word has length 29 [2025-02-05 14:54:05,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:05,508 INFO L471 AbstractCegarLoop]: Abstraction has 445 states and 648 transitions. [2025-02-05 14:54:05,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:54:05,509 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 648 transitions. [2025-02-05 14:54:05,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-02-05 14:54:05,509 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:05,509 INFO L218 NwaCegarLoop]: trace histogram [15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:54:05,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-02-05 14:54:05,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:05,710 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:05,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:05,710 INFO L85 PathProgramCache]: Analyzing trace with hash -509668086, now seen corresponding path program 16 times [2025-02-05 14:54:05,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:05,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406620249] [2025-02-05 14:54:05,711 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:54:05,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:05,713 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-02-05 14:54:05,719 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-05 14:54:05,720 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:54:05,720 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:05,938 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 14:54:05,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:05,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406620249] [2025-02-05 14:54:05,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406620249] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:05,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613830917] [2025-02-05 14:54:05,939 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:54:05,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:05,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:05,941 INFO L229 MonitoredProcess]: Starting monitored process 22 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 14:54:05,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-02-05 14:54:05,968 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-02-05 14:54:05,988 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-05 14:54:05,988 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:54:05,988 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:05,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-02-05 14:54:05,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:06,035 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 14:54:06,035 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:06,628 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 14:54:06,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613830917] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:06,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:06,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2025-02-05 14:54:06,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142682627] [2025-02-05 14:54:06,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:06,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-02-05 14:54:06,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:06,629 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-02-05 14:54:06,629 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=1293, Unknown=0, NotChecked=0, Total=1640 [2025-02-05 14:54:06,629 INFO L87 Difference]: Start difference. First operand 445 states and 648 transitions. Second operand has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 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) [2025-02-05 14:54:37,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:37,714 INFO L93 Difference]: Finished difference Result 1617 states and 2330 transitions. [2025-02-05 14:54:37,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2025-02-05 14:54:37,714 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 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) Word has length 29 [2025-02-05 14:54:37,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:37,718 INFO L225 Difference]: With dead ends: 1617 [2025-02-05 14:54:37,718 INFO L226 Difference]: Without dead ends: 1555 [2025-02-05 14:54:37,721 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23631 ImplicationChecksByTransitivity, 26.9s TimeCoverageRelationStatistics Valid=13494, Invalid=43866, Unknown=0, NotChecked=0, Total=57360 [2025-02-05 14:54:37,722 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 1500 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 2315 mSolverCounterSat, 1080 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1500 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 3395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1080 IncrementalHoareTripleChecker+Valid, 2315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:37,722 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1500 Valid, 315 Invalid, 3395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1080 Valid, 2315 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2025-02-05 14:54:37,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2025-02-05 14:54:38,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 469. [2025-02-05 14:54:38,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 1.4572649572649572) internal successors, (682), 468 states have internal predecessors, (682), 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 14:54:38,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 682 transitions. [2025-02-05 14:54:38,038 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 682 transitions. Word has length 29 [2025-02-05 14:54:38,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:38,038 INFO L471 AbstractCegarLoop]: Abstraction has 469 states and 682 transitions. [2025-02-05 14:54:38,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 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) [2025-02-05 14:54:38,038 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 682 transitions. [2025-02-05 14:54:38,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-02-05 14:54:38,039 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:38,039 INFO L218 NwaCegarLoop]: trace histogram [10, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:54:38,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-02-05 14:54:38,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-02-05 14:54:38,243 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:38,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:38,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1983474152, now seen corresponding path program 17 times [2025-02-05 14:54:38,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:38,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813987624] [2025-02-05 14:54:38,244 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 14:54:38,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:38,247 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 6 equivalence classes. [2025-02-05 14:54:38,259 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 30 of 30 statements. [2025-02-05 14:54:38,259 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-05 14:54:38,259 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:38,451 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 14:54:38,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:38,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813987624] [2025-02-05 14:54:38,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813987624] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:38,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234748432] [2025-02-05 14:54:38,451 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 14:54:38,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:38,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:38,453 INFO L229 MonitoredProcess]: Starting monitored process 23 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 14:54:38,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-02-05 14:54:38,479 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 6 equivalence classes. [2025-02-05 14:54:38,524 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 30 of 30 statements. [2025-02-05 14:54:38,524 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-05 14:54:38,524 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:38,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-02-05 14:54:38,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:38,632 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-05 14:54:38,632 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-05 14:54:38,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234748432] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:38,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:38,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 37 [2025-02-05 14:54:38,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198145609] [2025-02-05 14:54:38,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:38,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-02-05 14:54:38,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:38,947 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-02-05 14:54:38,947 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1137, Unknown=0, NotChecked=0, Total=1332 [2025-02-05 14:54:38,947 INFO L87 Difference]: Start difference. First operand 469 states and 682 transitions. Second operand has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 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 14:54:40,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:40,427 INFO L93 Difference]: Finished difference Result 808 states and 1034 transitions. [2025-02-05 14:54:40,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-02-05 14:54:40,428 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 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) Word has length 30 [2025-02-05 14:54:40,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:40,431 INFO L225 Difference]: With dead ends: 808 [2025-02-05 14:54:40,431 INFO L226 Difference]: Without dead ends: 753 [2025-02-05 14:54:40,431 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=460, Invalid=2192, Unknown=0, NotChecked=0, Total=2652 [2025-02-05 14:54:40,432 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 52 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:40,432 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 104 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 14:54:40,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2025-02-05 14:54:40,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 436. [2025-02-05 14:54:40,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.4666666666666666) internal successors, (638), 435 states have internal predecessors, (638), 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 14:54:40,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 638 transitions. [2025-02-05 14:54:40,755 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 638 transitions. Word has length 30 [2025-02-05 14:54:40,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:40,755 INFO L471 AbstractCegarLoop]: Abstraction has 436 states and 638 transitions. [2025-02-05 14:54:40,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 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 14:54:40,755 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 638 transitions. [2025-02-05 14:54:40,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-02-05 14:54:40,756 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:40,756 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:54:40,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-02-05 14:54:40,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-02-05 14:54:40,960 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:40,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:40,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1932850363, now seen corresponding path program 18 times [2025-02-05 14:54:40,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:40,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000544959] [2025-02-05 14:54:40,961 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 14:54:40,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:40,971 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 32 statements into 4 equivalence classes. [2025-02-05 14:54:41,004 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 32 of 32 statements. [2025-02-05 14:54:41,008 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-02-05 14:54:41,008 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat