./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 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/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-?-551b009-m [2025-01-09 03:01:32,341 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 03:01:32,380 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 03:01:32,383 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 03:01:32,384 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 03:01:32,398 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 03:01:32,399 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 03:01:32,399 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 03:01:32,399 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 03:01:32,399 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 03:01:32,399 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 03:01:32,399 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 03:01:32,400 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 03:01:32,400 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 03:01:32,400 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 03:01:32,400 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 03:01:32,400 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 03:01:32,400 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 03:01:32,400 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 03:01:32,400 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 03:01:32,400 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 03:01:32,400 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 03:01:32,400 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 03:01:32,400 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 03:01:32,401 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 03:01:32,401 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 03:01:32,401 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 03:01:32,401 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 03:01:32,401 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 03:01:32,401 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 03:01:32,401 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 03:01:32,401 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 03:01:32,401 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 03:01:32,402 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 03:01:32,402 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 03:01:32,402 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 03:01:32,402 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 03:01:32,402 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 03:01:32,402 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 03:01:32,402 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 03:01:32,402 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 03:01:32,402 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 03:01:32,402 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 03:01:32,402 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 03:01:32,402 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 03:01:32,403 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 03:01:32,403 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 03:01:32,403 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 03:01:32,403 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 [2025-01-09 03:01:32,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 03:01:32,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 03:01:32,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 03:01:32,676 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 03:01:32,676 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 03:01:32,677 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de41.c [2025-01-09 03:01:33,839 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c2cb862c8/56c2e614503140229be7f8c17666a882/FLAGedf29aa6c [2025-01-09 03:01:34,093 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 03:01:34,098 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de41.c [2025-01-09 03:01:34,109 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c2cb862c8/56c2e614503140229be7f8c17666a882/FLAGedf29aa6c [2025-01-09 03:01:34,155 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c2cb862c8/56c2e614503140229be7f8c17666a882 [2025-01-09 03:01:34,159 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 03:01:34,161 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 03:01:34,162 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 03:01:34,163 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 03:01:34,166 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 03:01:34,166 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 03:01:34" (1/1) ... [2025-01-09 03:01:34,167 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15889f41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:34, skipping insertion in model container [2025-01-09 03:01:34,167 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 03:01:34" (1/1) ... [2025-01-09 03:01:34,177 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 03:01:34,289 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] [2025-01-09 03:01:34,301 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 03:01:34,307 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 03:01:34,315 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] [2025-01-09 03:01:34,319 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 03:01:34,329 INFO L204 MainTranslator]: Completed translation [2025-01-09 03:01:34,330 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:34 WrapperNode [2025-01-09 03:01:34,331 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 03:01:34,331 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 03:01:34,332 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 03:01:34,332 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 03:01:34,337 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:34" (1/1) ... [2025-01-09 03:01:34,343 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:34" (1/1) ... [2025-01-09 03:01:34,354 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2025-01-09 03:01:34,355 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 03:01:34,355 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 03:01:34,355 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 03:01:34,355 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 03:01:34,361 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:34" (1/1) ... [2025-01-09 03:01:34,361 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:34" (1/1) ... [2025-01-09 03:01:34,363 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:34" (1/1) ... [2025-01-09 03:01:34,369 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-01-09 03:01:34,370 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:34" (1/1) ... [2025-01-09 03:01:34,370 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:34" (1/1) ... [2025-01-09 03:01:34,374 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:34" (1/1) ... [2025-01-09 03:01:34,376 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:34" (1/1) ... [2025-01-09 03:01:34,379 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:34" (1/1) ... [2025-01-09 03:01:34,380 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:34" (1/1) ... [2025-01-09 03:01:34,380 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:34" (1/1) ... [2025-01-09 03:01:34,381 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 03:01:34,384 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 03:01:34,384 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 03:01:34,384 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 03:01:34,385 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:34" (1/1) ... [2025-01-09 03:01:34,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 03:01:34,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:01:34,444 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-09 03:01:34,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-09 03:01:34,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 03:01:34,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 03:01:34,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 03:01:34,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 03:01:34,512 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 03:01:34,514 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 03:01:34,608 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2025-01-09 03:01:34,609 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 03:01:34,617 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 03:01:34,618 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-09 03:01:34,618 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 03:01:34 BoogieIcfgContainer [2025-01-09 03:01:34,618 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 03:01:34,620 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 03:01:34,621 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 03:01:34,625 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 03:01:34,625 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 03:01:34" (1/3) ... [2025-01-09 03:01:34,626 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25e276ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 03:01:34, skipping insertion in model container [2025-01-09 03:01:34,626 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:01:34" (2/3) ... [2025-01-09 03:01:34,626 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25e276ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 03:01:34, skipping insertion in model container [2025-01-09 03:01:34,627 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 03:01:34" (3/3) ... [2025-01-09 03:01:34,628 INFO L128 eAbstractionObserver]: Analyzing ICFG in-de41.c [2025-01-09 03:01:34,637 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 03:01:34,639 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. [2025-01-09 03:01:34,680 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 03:01:34,689 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;@787b5d70, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 03:01:34,689 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-09 03:01:34,693 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) [2025-01-09 03:01:34,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-01-09 03:01:34,698 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:01:34,698 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:01:34,699 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:01:34,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:01:34,702 INFO L85 PathProgramCache]: Analyzing trace with hash 210137137, now seen corresponding path program 1 times [2025-01-09 03:01:34,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:01:34,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372522850] [2025-01-09 03:01:34,708 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:01:34,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:01:34,761 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-01-09 03:01:34,794 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-01-09 03:01:34,796 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:01:34,796 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:35,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 03:01:35,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:01:35,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372522850] [2025-01-09 03:01:35,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372522850] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:01:35,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:01:35,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 03:01:35,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807368266] [2025-01-09 03:01:35,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:01:35,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:01:35,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:01:35,136 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:01:35,136 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:01:35,137 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) [2025-01-09 03:01:35,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:01:35,190 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2025-01-09 03:01:35,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:01:35,192 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 [2025-01-09 03:01:35,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:01:35,196 INFO L225 Difference]: With dead ends: 27 [2025-01-09 03:01:35,196 INFO L226 Difference]: Without dead ends: 11 [2025-01-09 03:01:35,197 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 [2025-01-09 03:01:35,199 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 [2025-01-09 03:01:35,199 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] [2025-01-09 03:01:35,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2025-01-09 03:01:35,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2025-01-09 03:01:35,214 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) [2025-01-09 03:01:35,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2025-01-09 03:01:35,220 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 8 [2025-01-09 03:01:35,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:01:35,220 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2025-01-09 03:01:35,221 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) [2025-01-09 03:01:35,222 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2025-01-09 03:01:35,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-01-09 03:01:35,222 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:01:35,222 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:01:35,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 03:01:35,222 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:01:35,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:01:35,224 INFO L85 PathProgramCache]: Analyzing trace with hash 266778897, now seen corresponding path program 1 times [2025-01-09 03:01:35,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:01:35,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471409042] [2025-01-09 03:01:35,224 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:01:35,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:01:35,229 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-01-09 03:01:35,235 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-01-09 03:01:35,238 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:01:35,238 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:35,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 03:01:35,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:01:35,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471409042] [2025-01-09 03:01:35,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471409042] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:01:35,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785255376] [2025-01-09 03:01:35,350 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:01:35,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:01:35,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:01:35,355 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:01:35,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-09 03:01:35,389 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-01-09 03:01:35,395 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-01-09 03:01:35,395 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:01:35,395 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:35,397 INFO L256 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-01-09 03:01:35,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:01:35,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 03:01:35,434 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:01:35,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 03:01:35,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785255376] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:01:35,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:01:35,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2025-01-09 03:01:35,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016271122] [2025-01-09 03:01:35,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:01:35,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-09 03:01:35,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:01:35,495 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-09 03:01:35,495 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2025-01-09 03:01:35,495 INFO L87 Difference]: Start difference. First operand 11 states and 15 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) [2025-01-09 03:01:35,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:01:35,630 INFO L93 Difference]: Finished difference Result 36 states and 61 transitions. [2025-01-09 03:01:35,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-09 03:01:35,631 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 [2025-01-09 03:01:35,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:01:35,632 INFO L225 Difference]: With dead ends: 36 [2025-01-09 03:01:35,632 INFO L226 Difference]: Without dead ends: 31 [2025-01-09 03:01:35,632 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2025-01-09 03:01:35,633 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:01:35,633 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 24 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:01:35,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-01-09 03:01:35,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2025-01-09 03:01:35,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 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) [2025-01-09 03:01:35,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2025-01-09 03:01:35,643 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 9 [2025-01-09 03:01:35,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:01:35,643 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2025-01-09 03:01:35,643 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) [2025-01-09 03:01:35,644 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2025-01-09 03:01:35,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-01-09 03:01:35,644 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:01:35,645 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:01:35,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-01-09 03:01:35,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:01:35,846 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:01:35,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:01:35,847 INFO L85 PathProgramCache]: Analyzing trace with hash -2138664433, now seen corresponding path program 1 times [2025-01-09 03:01:35,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:01:35,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84801579] [2025-01-09 03:01:35,847 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:01:35,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:01:35,852 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-01-09 03:01:35,855 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-01-09 03:01:35,856 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:01:35,856 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:35,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 03:01:35,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:01:35,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84801579] [2025-01-09 03:01:35,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84801579] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:01:35,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:01:35,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-09 03:01:35,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662303173] [2025-01-09 03:01:35,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:01:35,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 03:01:35,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:01:35,882 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 03:01:35,882 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 03:01:35,882 INFO L87 Difference]: Start difference. First operand 22 states and 32 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) [2025-01-09 03:01:35,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:01:35,900 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2025-01-09 03:01:35,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 03:01:35,901 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 [2025-01-09 03:01:35,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:01:35,901 INFO L225 Difference]: With dead ends: 27 [2025-01-09 03:01:35,901 INFO L226 Difference]: Without dead ends: 20 [2025-01-09 03:01:35,901 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 [2025-01-09 03:01:35,902 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 [2025-01-09 03:01:35,902 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] [2025-01-09 03:01:35,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-01-09 03:01:35,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-01-09 03:01:35,905 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) [2025-01-09 03:01:35,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2025-01-09 03:01:35,905 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 9 [2025-01-09 03:01:35,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:01:35,906 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2025-01-09 03:01:35,906 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) [2025-01-09 03:01:35,906 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2025-01-09 03:01:35,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-01-09 03:01:35,906 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:01:35,906 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:01:35,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-09 03:01:35,907 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:01:35,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:01:35,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1017007123, now seen corresponding path program 1 times [2025-01-09 03:01:35,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:01:35,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176989274] [2025-01-09 03:01:35,907 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:01:35,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:01:35,910 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-09 03:01:35,920 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-09 03:01:35,923 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:01:35,923 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 03:01:35,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:01:35,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176989274] [2025-01-09 03:01:35,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176989274] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:01:35,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228744657] [2025-01-09 03:01:35,995 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:01:35,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:01:35,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:01:35,998 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:01:36,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-09 03:01:36,030 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-09 03:01:36,042 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-09 03:01:36,043 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:01:36,043 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:36,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-01-09 03:01:36,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:01:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 03:01:36,088 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:01:36,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 03:01:36,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228744657] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:01:36,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:01:36,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2025-01-09 03:01:36,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440066513] [2025-01-09 03:01:36,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:01:36,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 03:01:36,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:01:36,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 03:01:36,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-01-09 03:01:36,115 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) [2025-01-09 03:01:36,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:01:36,165 INFO L93 Difference]: Finished difference Result 52 states and 79 transitions. [2025-01-09 03:01:36,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-09 03:01:36,165 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 [2025-01-09 03:01:36,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:01:36,166 INFO L225 Difference]: With dead ends: 52 [2025-01-09 03:01:36,166 INFO L226 Difference]: Without dead ends: 48 [2025-01-09 03:01:36,167 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 [2025-01-09 03:01:36,167 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:01:36,168 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 29 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:01:36,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-01-09 03:01:36,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2025-01-09 03:01:36,179 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) [2025-01-09 03:01:36,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 63 transitions. [2025-01-09 03:01:36,180 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 63 transitions. Word has length 11 [2025-01-09 03:01:36,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:01:36,180 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 63 transitions. [2025-01-09 03:01:36,180 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) [2025-01-09 03:01:36,180 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 63 transitions. [2025-01-09 03:01:36,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-01-09 03:01:36,181 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:01:36,181 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:01:36,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-01-09 03:01:36,385 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 [2025-01-09 03:01:36,385 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:01:36,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:01:36,387 INFO L85 PathProgramCache]: Analyzing trace with hash 113354801, now seen corresponding path program 2 times [2025-01-09 03:01:36,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:01:36,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160098744] [2025-01-09 03:01:36,387 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:01:36,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:01:36,392 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-01-09 03:01:36,400 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 12 of 12 statements. [2025-01-09 03:01:36,400 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:01:36,400 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:36,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 03:01:36,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:01:36,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160098744] [2025-01-09 03:01:36,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160098744] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:01:36,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203165687] [2025-01-09 03:01:36,472 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:01:36,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:01:36,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:01:36,474 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:01:36,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-09 03:01:36,520 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-01-09 03:01:36,528 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 12 of 12 statements. [2025-01-09 03:01:36,528 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:01:36,528 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:36,528 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-01-09 03:01:36,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:01:36,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 03:01:36,546 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:01:36,626 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 03:01:36,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203165687] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:01:36,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:01:36,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2025-01-09 03:01:36,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005552135] [2025-01-09 03:01:36,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:01:36,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-01-09 03:01:36,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:01:36,627 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-01-09 03:01:36,627 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2025-01-09 03:01:36,627 INFO L87 Difference]: Start difference. First operand 42 states and 63 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) [2025-01-09 03:01:37,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:01:37,140 INFO L93 Difference]: Finished difference Result 156 states and 276 transitions. [2025-01-09 03:01:37,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-01-09 03:01:37,140 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 [2025-01-09 03:01:37,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:01:37,142 INFO L225 Difference]: With dead ends: 156 [2025-01-09 03:01:37,142 INFO L226 Difference]: Without dead ends: 145 [2025-01-09 03:01:37,142 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=690, Unknown=0, NotChecked=0, Total=992 [2025-01-09 03:01:37,143 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 128 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 03:01:37,143 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 52 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 03:01:37,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2025-01-09 03:01:37,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 71. [2025-01-09 03:01:37,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.5571428571428572) internal successors, (109), 70 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:01:37,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 109 transitions. [2025-01-09 03:01:37,163 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 109 transitions. Word has length 12 [2025-01-09 03:01:37,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:01:37,163 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 109 transitions. [2025-01-09 03:01:37,163 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) [2025-01-09 03:01:37,163 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 109 transitions. [2025-01-09 03:01:37,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-01-09 03:01:37,163 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:01:37,163 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:01:37,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-01-09 03:01:37,364 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 [2025-01-09 03:01:37,365 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:01:37,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:01:37,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1462387245, now seen corresponding path program 1 times [2025-01-09 03:01:37,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:01:37,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693983091] [2025-01-09 03:01:37,366 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:01:37,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:01:37,370 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-01-09 03:01:37,398 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-01-09 03:01:37,398 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:01:37,398 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:37,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 03:01:37,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:01:37,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693983091] [2025-01-09 03:01:37,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693983091] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:01:37,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496247921] [2025-01-09 03:01:37,564 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:01:37,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:01:37,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:01:37,566 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:01:37,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-09 03:01:37,585 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-01-09 03:01:37,595 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-01-09 03:01:37,595 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:01:37,595 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:37,598 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-01-09 03:01:37,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:01:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 03:01:37,686 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:01:37,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 03:01:37,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496247921] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:01:37,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:01:37,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2025-01-09 03:01:37,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372290432] [2025-01-09 03:01:37,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:01:37,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-01-09 03:01:37,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:01:37,774 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-01-09 03:01:37,774 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2025-01-09 03:01:37,775 INFO L87 Difference]: Start difference. First operand 71 states and 109 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:01:37,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:01:37,978 INFO L93 Difference]: Finished difference Result 97 states and 137 transitions. [2025-01-09 03:01:37,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-01-09 03:01:37,978 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2025-01-09 03:01:37,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:01:37,979 INFO L225 Difference]: With dead ends: 97 [2025-01-09 03:01:37,979 INFO L226 Difference]: Without dead ends: 90 [2025-01-09 03:01:37,979 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2025-01-09 03:01:37,980 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:01:37,980 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 33 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:01:37,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2025-01-09 03:01:37,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2025-01-09 03:01:37,996 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) [2025-01-09 03:01:37,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 115 transitions. [2025-01-09 03:01:37,997 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 115 transitions. Word has length 12 [2025-01-09 03:01:37,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:01:37,997 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 115 transitions. [2025-01-09 03:01:37,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:01:37,997 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 115 transitions. [2025-01-09 03:01:37,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-01-09 03:01:37,998 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:01:37,998 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:01:38,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-09 03:01:38,202 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 [2025-01-09 03:01:38,202 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:01:38,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:01:38,203 INFO L85 PathProgramCache]: Analyzing trace with hash -29015247, now seen corresponding path program 2 times [2025-01-09 03:01:38,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:01:38,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419733325] [2025-01-09 03:01:38,203 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:01:38,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:01:38,206 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-01-09 03:01:38,210 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-01-09 03:01:38,210 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:01:38,210 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:38,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:01:38,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:01:38,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419733325] [2025-01-09 03:01:38,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419733325] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:01:38,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560251350] [2025-01-09 03:01:38,266 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:01:38,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:01:38,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:01:38,268 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:01:38,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-09 03:01:38,289 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-01-09 03:01:38,298 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-01-09 03:01:38,298 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:01:38,298 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:38,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-09 03:01:38,299 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:01:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:01:38,317 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:01:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:01:38,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560251350] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:01:38,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:01:38,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 12 [2025-01-09 03:01:38,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976732842] [2025-01-09 03:01:38,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:01:38,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-09 03:01:38,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:01:38,369 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-09 03:01:38,370 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2025-01-09 03:01:38,370 INFO L87 Difference]: Start difference. First operand 77 states and 115 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) [2025-01-09 03:01:38,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:01:38,549 INFO L93 Difference]: Finished difference Result 115 states and 163 transitions. [2025-01-09 03:01:38,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-01-09 03:01:38,549 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 [2025-01-09 03:01:38,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:01:38,550 INFO L225 Difference]: With dead ends: 115 [2025-01-09 03:01:38,550 INFO L226 Difference]: Without dead ends: 99 [2025-01-09 03:01:38,550 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2025-01-09 03:01:38,551 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 20 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:01:38,551 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 47 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:01:38,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2025-01-09 03:01:38,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 73. [2025-01-09 03:01:38,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.4861111111111112) internal successors, (107), 72 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:01:38,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 107 transitions. [2025-01-09 03:01:38,568 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 107 transitions. Word has length 14 [2025-01-09 03:01:38,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:01:38,568 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 107 transitions. [2025-01-09 03:01:38,568 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) [2025-01-09 03:01:38,568 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 107 transitions. [2025-01-09 03:01:38,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-01-09 03:01:38,569 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:01:38,569 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:01:38,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-01-09 03:01:38,769 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 [2025-01-09 03:01:38,770 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:01:38,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:01:38,770 INFO L85 PathProgramCache]: Analyzing trace with hash -451195663, now seen corresponding path program 2 times [2025-01-09 03:01:38,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:01:38,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086639390] [2025-01-09 03:01:38,770 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:01:38,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:01:38,773 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-01-09 03:01:38,780 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-01-09 03:01:38,780 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:01:38,780 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:38,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 03:01:38,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:01:38,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086639390] [2025-01-09 03:01:38,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086639390] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:01:38,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512968430] [2025-01-09 03:01:38,848 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:01:38,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:01:38,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:01:38,853 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:01:38,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-01-09 03:01:38,884 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-01-09 03:01:38,892 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-01-09 03:01:38,893 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:01:38,893 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:38,893 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-09 03:01:38,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:01:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:01:38,936 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:01:39,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:01:39,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512968430] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:01:39,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:01:39,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2025-01-09 03:01:39,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917637125] [2025-01-09 03:01:39,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:01:39,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-01-09 03:01:39,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:01:39,009 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-01-09 03:01:39,009 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2025-01-09 03:01:39,010 INFO L87 Difference]: Start difference. First operand 73 states and 107 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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) [2025-01-09 03:01:39,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:01:39,436 INFO L93 Difference]: Finished difference Result 129 states and 185 transitions. [2025-01-09 03:01:39,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-01-09 03:01:39,436 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 14 [2025-01-09 03:01:39,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:01:39,437 INFO L225 Difference]: With dead ends: 129 [2025-01-09 03:01:39,437 INFO L226 Difference]: Without dead ends: 112 [2025-01-09 03:01:39,437 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=953, Unknown=0, NotChecked=0, Total=1122 [2025-01-09 03:01:39,438 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 03:01:39,438 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 80 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 03:01:39,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2025-01-09 03:01:39,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2025-01-09 03:01:39,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.4565217391304348) internal successors, (134), 92 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:01:39,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 134 transitions. [2025-01-09 03:01:39,456 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 134 transitions. Word has length 14 [2025-01-09 03:01:39,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:01:39,457 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 134 transitions. [2025-01-09 03:01:39,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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) [2025-01-09 03:01:39,457 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 134 transitions. [2025-01-09 03:01:39,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-01-09 03:01:39,457 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:01:39,457 INFO L218 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:01:39,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-01-09 03:01:39,658 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 [2025-01-09 03:01:39,658 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:01:39,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:01:39,658 INFO L85 PathProgramCache]: Analyzing trace with hash -787908051, now seen corresponding path program 3 times [2025-01-09 03:01:39,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:01:39,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215148120] [2025-01-09 03:01:39,658 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:01:39,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:01:39,662 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 4 equivalence classes. [2025-01-09 03:01:39,673 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 03:01:39,673 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-01-09 03:01:39,673 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:39,753 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 03:01:39,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:01:39,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215148120] [2025-01-09 03:01:39,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215148120] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:01:39,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730066038] [2025-01-09 03:01:39,753 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:01:39,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:01:39,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:01:39,755 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:01:39,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-01-09 03:01:39,775 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 4 equivalence classes. [2025-01-09 03:01:39,855 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 03:01:39,855 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-01-09 03:01:39,855 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:39,856 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-01-09 03:01:39,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:01:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 03:01:39,880 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:01:39,984 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 03:01:39,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730066038] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:01:39,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:01:39,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2025-01-09 03:01:39,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168591764] [2025-01-09 03:01:39,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:01:39,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-01-09 03:01:39,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:01:39,986 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-01-09 03:01:39,986 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2025-01-09 03:01:39,986 INFO L87 Difference]: Start difference. First operand 93 states and 134 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 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) [2025-01-09 03:01:41,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:01:41,362 INFO L93 Difference]: Finished difference Result 270 states and 398 transitions. [2025-01-09 03:01:41,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2025-01-09 03:01:41,363 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 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) Word has length 16 [2025-01-09 03:01:41,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:01:41,364 INFO L225 Difference]: With dead ends: 270 [2025-01-09 03:01:41,364 INFO L226 Difference]: Without dead ends: 243 [2025-01-09 03:01:41,365 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1148, Invalid=3142, Unknown=0, NotChecked=0, Total=4290 [2025-01-09 03:01:41,366 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 177 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-09 03:01:41,366 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 89 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-09 03:01:41,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2025-01-09 03:01:41,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 104. [2025-01-09 03:01:41,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.4368932038834952) internal successors, (148), 103 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:01:41,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 148 transitions. [2025-01-09 03:01:41,388 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 148 transitions. Word has length 16 [2025-01-09 03:01:41,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:01:41,388 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 148 transitions. [2025-01-09 03:01:41,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 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) [2025-01-09 03:01:41,388 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 148 transitions. [2025-01-09 03:01:41,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-01-09 03:01:41,389 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:01:41,389 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:01:41,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-01-09 03:01:41,593 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 [2025-01-09 03:01:41,593 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:01:41,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:01:41,594 INFO L85 PathProgramCache]: Analyzing trace with hash -677494863, now seen corresponding path program 4 times [2025-01-09 03:01:41,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:01:41,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761286813] [2025-01-09 03:01:41,594 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 03:01:41,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:01:41,597 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-01-09 03:01:41,610 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 03:01:41,610 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 03:01:41,610 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:41,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 03:01:41,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:01:41,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761286813] [2025-01-09 03:01:41,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761286813] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:01:41,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056315041] [2025-01-09 03:01:41,919 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 03:01:41,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:01:41,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:01:41,921 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:01:41,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-01-09 03:01:41,942 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-01-09 03:01:41,958 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 03:01:41,958 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 03:01:41,958 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:41,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-01-09 03:01:41,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:01:42,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 03:01:42,298 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:01:42,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 03:01:42,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056315041] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:01:42,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:01:42,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 9] total 25 [2025-01-09 03:01:42,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328649246] [2025-01-09 03:01:42,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:01:42,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-01-09 03:01:42,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:01:42,522 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-01-09 03:01:42,522 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2025-01-09 03:01:42,522 INFO L87 Difference]: Start difference. First operand 104 states and 148 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:01:43,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:01:43,223 INFO L93 Difference]: Finished difference Result 142 states and 189 transitions. [2025-01-09 03:01:43,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-01-09 03:01:43,224 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-01-09 03:01:43,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:01:43,224 INFO L225 Difference]: With dead ends: 142 [2025-01-09 03:01:43,224 INFO L226 Difference]: Without dead ends: 133 [2025-01-09 03:01:43,225 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=272, Invalid=1210, Unknown=0, NotChecked=0, Total=1482 [2025-01-09 03:01:43,226 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 30 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 03:01:43,226 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 56 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 03:01:43,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2025-01-09 03:01:43,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 113. [2025-01-09 03:01:43,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.4107142857142858) internal successors, (158), 112 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:01:43,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 158 transitions. [2025-01-09 03:01:43,249 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 158 transitions. Word has length 16 [2025-01-09 03:01:43,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:01:43,249 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 158 transitions. [2025-01-09 03:01:43,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:01:43,249 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 158 transitions. [2025-01-09 03:01:43,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-01-09 03:01:43,250 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:01:43,250 INFO L218 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:01:43,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-01-09 03:01:43,450 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 [2025-01-09 03:01:43,451 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:01:43,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:01:43,451 INFO L85 PathProgramCache]: Analyzing trace with hash 45835023, now seen corresponding path program 3 times [2025-01-09 03:01:43,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:01:43,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098835441] [2025-01-09 03:01:43,451 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:01:43,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:01:43,455 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 4 equivalence classes. [2025-01-09 03:01:43,463 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 03:01:43,463 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-01-09 03:01:43,463 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:43,549 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 03:01:43,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:01:43,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098835441] [2025-01-09 03:01:43,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098835441] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:01:43,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121868924] [2025-01-09 03:01:43,550 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:01:43,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:01:43,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:01:43,554 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:01:43,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-01-09 03:01:43,575 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 4 equivalence classes. [2025-01-09 03:01:43,585 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 03:01:43,585 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-01-09 03:01:43,585 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:43,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-09 03:01:43,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:01:43,611 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-09 03:01:43,612 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:01:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-09 03:01:43,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121868924] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:01:43,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:01:43,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 19 [2025-01-09 03:01:43,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251809932] [2025-01-09 03:01:43,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:01:43,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-01-09 03:01:43,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:01:43,701 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-01-09 03:01:43,701 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2025-01-09 03:01:43,701 INFO L87 Difference]: Start difference. First operand 113 states and 158 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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) [2025-01-09 03:01:43,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:01:43,874 INFO L93 Difference]: Finished difference Result 148 states and 199 transitions. [2025-01-09 03:01:43,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-01-09 03:01:43,874 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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 17 [2025-01-09 03:01:43,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:01:43,875 INFO L225 Difference]: With dead ends: 148 [2025-01-09 03:01:43,875 INFO L226 Difference]: Without dead ends: 124 [2025-01-09 03:01:43,876 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2025-01-09 03:01:43,876 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:01:43,876 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 56 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:01:43,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2025-01-09 03:01:43,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 102. [2025-01-09 03:01:43,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.4059405940594059) internal successors, (142), 101 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:01:43,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 142 transitions. [2025-01-09 03:01:43,896 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 142 transitions. Word has length 17 [2025-01-09 03:01:43,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:01:43,896 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 142 transitions. [2025-01-09 03:01:43,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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) [2025-01-09 03:01:43,897 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 142 transitions. [2025-01-09 03:01:43,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-01-09 03:01:43,897 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:01:43,897 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:01:43,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-01-09 03:01:44,101 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 [2025-01-09 03:01:44,101 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:01:44,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:01:44,102 INFO L85 PathProgramCache]: Analyzing trace with hash -600007567, now seen corresponding path program 5 times [2025-01-09 03:01:44,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:01:44,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084645041] [2025-01-09 03:01:44,102 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 03:01:44,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:01:44,107 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 3 equivalence classes. [2025-01-09 03:01:44,114 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 03:01:44,115 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-01-09 03:01:44,115 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-01-09 03:01:44,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:01:44,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084645041] [2025-01-09 03:01:44,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084645041] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:01:44,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391030677] [2025-01-09 03:01:44,178 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 03:01:44,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:01:44,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:01:44,180 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:01:44,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-01-09 03:01:44,203 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 3 equivalence classes. [2025-01-09 03:01:44,214 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 03:01:44,214 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-01-09 03:01:44,214 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:44,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-01-09 03:01:44,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:01:44,249 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-01-09 03:01:44,249 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:01:44,333 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-01-09 03:01:44,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391030677] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:01:44,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:01:44,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2025-01-09 03:01:44,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580981878] [2025-01-09 03:01:44,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:01:44,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-09 03:01:44,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:01:44,334 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-09 03:01:44,334 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2025-01-09 03:01:44,334 INFO L87 Difference]: Start difference. First operand 102 states and 142 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 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) [2025-01-09 03:01:44,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:01:44,668 INFO L93 Difference]: Finished difference Result 156 states and 206 transitions. [2025-01-09 03:01:44,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-01-09 03:01:44,668 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 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) Word has length 18 [2025-01-09 03:01:44,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:01:44,669 INFO L225 Difference]: With dead ends: 156 [2025-01-09 03:01:44,669 INFO L226 Difference]: Without dead ends: 135 [2025-01-09 03:01:44,670 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2025-01-09 03:01:44,670 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 03:01:44,670 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 46 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 03:01:44,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2025-01-09 03:01:44,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 98. [2025-01-09 03:01:44,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.3814432989690721) internal successors, (134), 97 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:01:44,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 134 transitions. [2025-01-09 03:01:44,694 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 134 transitions. Word has length 18 [2025-01-09 03:01:44,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:01:44,694 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 134 transitions. [2025-01-09 03:01:44,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 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) [2025-01-09 03:01:44,694 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 134 transitions. [2025-01-09 03:01:44,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-01-09 03:01:44,695 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:01:44,695 INFO L218 NwaCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:01:44,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-01-09 03:01:44,899 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 [2025-01-09 03:01:44,899 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:01:44,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:01:44,899 INFO L85 PathProgramCache]: Analyzing trace with hash 898673937, now seen corresponding path program 3 times [2025-01-09 03:01:44,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:01:44,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611193839] [2025-01-09 03:01:44,900 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:01:44,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:01:44,902 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 7 equivalence classes. [2025-01-09 03:01:44,909 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 19 of 19 statements. [2025-01-09 03:01:44,909 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-01-09 03:01:44,909 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:45,019 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 03:01:45,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:01:45,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611193839] [2025-01-09 03:01:45,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611193839] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:01:45,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759869306] [2025-01-09 03:01:45,019 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:01:45,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:01:45,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:01:45,023 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:01:45,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-01-09 03:01:45,044 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 7 equivalence classes. [2025-01-09 03:01:45,066 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 19 of 19 statements. [2025-01-09 03:01:45,067 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-01-09 03:01:45,067 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:45,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-01-09 03:01:45,069 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:01:45,100 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 03:01:45,100 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:01:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 03:01:45,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759869306] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:01:45,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:01:45,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 29 [2025-01-09 03:01:45,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497631998] [2025-01-09 03:01:45,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:01:45,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-01-09 03:01:45,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:01:45,336 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-01-09 03:01:45,336 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2025-01-09 03:01:45,337 INFO L87 Difference]: Start difference. First operand 98 states and 134 transitions. Second operand has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:01:49,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:01:49,137 INFO L93 Difference]: Finished difference Result 552 states and 831 transitions. [2025-01-09 03:01:49,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2025-01-09 03:01:49,138 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2025-01-09 03:01:49,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:01:49,143 INFO L225 Difference]: With dead ends: 552 [2025-01-09 03:01:49,143 INFO L226 Difference]: Without dead ends: 495 [2025-01-09 03:01:49,145 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1888 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1877, Invalid=4929, Unknown=0, NotChecked=0, Total=6806 [2025-01-09 03:01:49,146 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 504 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 457 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 457 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-01-09 03:01:49,146 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 190 Invalid, 1539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [457 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-01-09 03:01:49,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2025-01-09 03:01:49,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 163. [2025-01-09 03:01:49,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.4074074074074074) internal successors, (228), 162 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:01:49,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 228 transitions. [2025-01-09 03:01:49,208 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 228 transitions. Word has length 19 [2025-01-09 03:01:49,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:01:49,208 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 228 transitions. [2025-01-09 03:01:49,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:01:49,209 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 228 transitions. [2025-01-09 03:01:49,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-01-09 03:01:49,209 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:01:49,210 INFO L218 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:01:49,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-01-09 03:01:49,414 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 [2025-01-09 03:01:49,414 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:01:49,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:01:49,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1209409841, now seen corresponding path program 4 times [2025-01-09 03:01:49,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:01:49,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317438454] [2025-01-09 03:01:49,415 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 03:01:49,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:01:49,422 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-01-09 03:01:49,430 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 03:01:49,430 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 03:01:49,430 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:49,513 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-01-09 03:01:49,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:01:49,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317438454] [2025-01-09 03:01:49,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317438454] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:01:49,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785807727] [2025-01-09 03:01:49,514 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 03:01:49,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:01:49,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:01:49,518 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) [2025-01-09 03:01:49,521 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 [2025-01-09 03:01:49,541 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-01-09 03:01:49,551 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 03:01:49,551 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 03:01:49,551 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:49,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-01-09 03:01:49,553 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:01:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-09 03:01:49,614 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:01:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-09 03:01:49,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785807727] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:01:49,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:01:49,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 24 [2025-01-09 03:01:49,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432893272] [2025-01-09 03:01:49,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:01:49,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-01-09 03:01:49,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:01:49,814 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-01-09 03:01:49,814 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2025-01-09 03:01:49,815 INFO L87 Difference]: Start difference. First operand 163 states and 228 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:01:52,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:01:52,438 INFO L93 Difference]: Finished difference Result 399 states and 500 transitions. [2025-01-09 03:01:52,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2025-01-09 03:01:52,438 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2025-01-09 03:01:52,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:01:52,440 INFO L225 Difference]: With dead ends: 399 [2025-01-09 03:01:52,440 INFO L226 Difference]: Without dead ends: 368 [2025-01-09 03:01:52,446 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2828 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1705, Invalid=8395, Unknown=0, NotChecked=0, Total=10100 [2025-01-09 03:01:52,447 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 243 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-09 03:01:52,447 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 135 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-09 03:01:52,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2025-01-09 03:01:52,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 167. [2025-01-09 03:01:52,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.3855421686746987) internal successors, (230), 166 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:01:52,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 230 transitions. [2025-01-09 03:01:52,514 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 230 transitions. Word has length 20 [2025-01-09 03:01:52,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:01:52,514 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 230 transitions. [2025-01-09 03:01:52,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:01:52,514 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 230 transitions. [2025-01-09 03:01:52,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-01-09 03:01:52,515 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:01:52,515 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:01:52,521 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 [2025-01-09 03:01:52,719 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 [2025-01-09 03:01:52,719 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:01:52,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:01:52,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1189649491, now seen corresponding path program 6 times [2025-01-09 03:01:52,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:01:52,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841975046] [2025-01-09 03:01:52,721 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 03:01:52,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:01:52,727 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 3 equivalence classes. [2025-01-09 03:01:52,747 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 03:01:52,747 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-01-09 03:01:52,747 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:53,878 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 03:01:53,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:01:53,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841975046] [2025-01-09 03:01:53,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841975046] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:01:53,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107419886] [2025-01-09 03:01:53,879 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 03:01:53,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:01:53,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:01:53,885 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) [2025-01-09 03:01:53,886 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 [2025-01-09 03:01:53,909 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 3 equivalence classes. [2025-01-09 03:01:53,939 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 03:01:53,939 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-01-09 03:01:53,939 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:53,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-01-09 03:01:53,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:01:54,363 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 03:01:54,363 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:01:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 03:01:54,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107419886] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:01:54,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:01:54,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 12] total 35 [2025-01-09 03:01:54,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613313624] [2025-01-09 03:01:54,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:01:54,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-01-09 03:01:54,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:01:54,784 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-01-09 03:01:54,784 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2025-01-09 03:01:54,784 INFO L87 Difference]: Start difference. First operand 167 states and 230 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:01:56,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:01:56,283 INFO L93 Difference]: Finished difference Result 220 states and 282 transitions. [2025-01-09 03:01:56,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-01-09 03:01:56,283 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 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 [2025-01-09 03:01:56,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:01:56,286 INFO L225 Difference]: With dead ends: 220 [2025-01-09 03:01:56,286 INFO L226 Difference]: Without dead ends: 205 [2025-01-09 03:01:56,289 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=483, Invalid=2939, Unknown=0, NotChecked=0, Total=3422 [2025-01-09 03:01:56,289 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-09 03:01:56,290 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 131 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-09 03:01:56,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2025-01-09 03:01:56,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 163. [2025-01-09 03:01:56,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.3888888888888888) internal successors, (225), 162 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:01:56,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 225 transitions. [2025-01-09 03:01:56,350 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 225 transitions. Word has length 20 [2025-01-09 03:01:56,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:01:56,350 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 225 transitions. [2025-01-09 03:01:56,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:01:56,353 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 225 transitions. [2025-01-09 03:01:56,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-01-09 03:01:56,353 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:01:56,353 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:01:56,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-01-09 03:01:56,558 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 [2025-01-09 03:01:56,558 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:01:56,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:01:56,558 INFO L85 PathProgramCache]: Analyzing trace with hash -910144945, now seen corresponding path program 7 times [2025-01-09 03:01:56,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:01:56,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015669601] [2025-01-09 03:01:56,558 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 03:01:56,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:01:56,563 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-01-09 03:01:56,574 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 03:01:56,574 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:01:56,574 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-09 03:01:56,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:01:56,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015669601] [2025-01-09 03:01:56,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015669601] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:01:56,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200548016] [2025-01-09 03:01:56,708 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 03:01:56,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:01:56,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:01:56,710 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) [2025-01-09 03:01:56,714 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 [2025-01-09 03:01:56,733 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-01-09 03:01:56,742 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 03:01:56,742 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:01:56,742 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:01:56,743 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-01-09 03:01:56,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:01:56,836 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-01-09 03:01:56,836 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:01:56,892 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-01-09 03:01:56,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200548016] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:01:56,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:01:56,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 20 [2025-01-09 03:01:56,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268839608] [2025-01-09 03:01:56,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:01:56,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-01-09 03:01:56,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:01:56,893 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-01-09 03:01:56,893 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2025-01-09 03:01:56,893 INFO L87 Difference]: Start difference. First operand 163 states and 225 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 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) [2025-01-09 03:02:08,972 WARN L286 SmtUtils]: Spent 12.03s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-01-09 03:02:16,998 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-01-09 03:02:29,159 WARN L286 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-01-09 03:02:37,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:02:37,369 INFO L93 Difference]: Finished difference Result 346 states and 497 transitions. [2025-01-09 03:02:37,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-01-09 03:02:37,369 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 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 [2025-01-09 03:02:37,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:02:37,371 INFO L225 Difference]: With dead ends: 346 [2025-01-09 03:02:37,371 INFO L226 Difference]: Without dead ends: 342 [2025-01-09 03:02:37,371 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 40.4s TimeCoverageRelationStatistics Valid=302, Invalid=628, Unknown=0, NotChecked=0, Total=930 [2025-01-09 03:02:37,371 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 72 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:02:37,371 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 128 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:02:37,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2025-01-09 03:02:37,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 255. [2025-01-09 03:02:37,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.4763779527559056) internal successors, (375), 254 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:02:37,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 375 transitions. [2025-01-09 03:02:37,453 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 375 transitions. Word has length 21 [2025-01-09 03:02:37,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:02:37,453 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 375 transitions. [2025-01-09 03:02:37,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 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) [2025-01-09 03:02:37,454 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 375 transitions. [2025-01-09 03:02:37,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-01-09 03:02:37,456 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:02:37,456 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:02:37,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-01-09 03:02:37,660 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 [2025-01-09 03:02:37,660 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:02:37,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:02:37,661 INFO L85 PathProgramCache]: Analyzing trace with hash -61575375, now seen corresponding path program 8 times [2025-01-09 03:02:37,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:02:37,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477748660] [2025-01-09 03:02:37,661 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:02:37,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:02:37,663 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-01-09 03:02:37,686 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-01-09 03:02:37,688 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:02:37,688 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:02:38,035 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-09 03:02:38,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:02:38,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477748660] [2025-01-09 03:02:38,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477748660] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:02:38,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243574943] [2025-01-09 03:02:38,036 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:02:38,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:02:38,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:02:38,038 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) [2025-01-09 03:02:38,042 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 [2025-01-09 03:02:38,070 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-01-09 03:02:38,119 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-01-09 03:02:38,119 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:02:38,119 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:02:38,120 WARN L254 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 60 conjuncts are in the unsatisfiable core [2025-01-09 03:02:38,121 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:02:38,568 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 03:02:38,568 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:02:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 03:02:39,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243574943] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:02:39,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:02:39,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 21] total 47 [2025-01-09 03:02:39,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160295720] [2025-01-09 03:02:39,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:02:39,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-01-09 03:02:39,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:02:39,430 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-01-09 03:02:39,430 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1875, Unknown=0, NotChecked=0, Total=2162 [2025-01-09 03:02:39,430 INFO L87 Difference]: Start difference. First operand 255 states and 375 transitions. Second operand has 47 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 47 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:02:43,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:02:43,411 INFO L93 Difference]: Finished difference Result 373 states and 501 transitions. [2025-01-09 03:02:43,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2025-01-09 03:02:43,412 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 47 states have internal predecessors, (64), 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 [2025-01-09 03:02:43,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:02:43,414 INFO L225 Difference]: With dead ends: 373 [2025-01-09 03:02:43,414 INFO L226 Difference]: Without dead ends: 360 [2025-01-09 03:02:43,416 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2795 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1735, Invalid=10037, Unknown=0, NotChecked=0, Total=11772 [2025-01-09 03:02:43,416 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 77 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-01-09 03:02:43,417 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 195 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-01-09 03:02:43,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2025-01-09 03:02:43,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 276. [2025-01-09 03:02:43,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.450909090909091) internal successors, (399), 275 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:02:43,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 399 transitions. [2025-01-09 03:02:43,521 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 399 transitions. Word has length 24 [2025-01-09 03:02:43,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:02:43,522 INFO L471 AbstractCegarLoop]: Abstraction has 276 states and 399 transitions. [2025-01-09 03:02:43,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 47 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:02:43,522 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 399 transitions. [2025-01-09 03:02:43,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-01-09 03:02:43,522 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:02:43,522 INFO L218 NwaCegarLoop]: trace histogram [12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:02:43,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-01-09 03:02:43,722 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 [2025-01-09 03:02:43,723 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:02:43,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:02:43,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1352256433, now seen corresponding path program 9 times [2025-01-09 03:02:43,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:02:43,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129982689] [2025-01-09 03:02:43,723 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:02:43,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:02:43,727 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 7 equivalence classes. [2025-01-09 03:02:43,744 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 26 of 26 statements. [2025-01-09 03:02:43,744 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-01-09 03:02:43,744 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:02:43,982 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-09 03:02:43,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:02:43,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129982689] [2025-01-09 03:02:43,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129982689] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:02:43,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980707685] [2025-01-09 03:02:43,982 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:02:43,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:02:43,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:02:43,984 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) [2025-01-09 03:02:43,988 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 [2025-01-09 03:02:44,008 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 7 equivalence classes. [2025-01-09 03:02:44,254 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 26 of 26 statements. [2025-01-09 03:02:44,254 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-01-09 03:02:44,254 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:02:44,255 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-01-09 03:02:44,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:02:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-09 03:02:44,308 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:02:44,621 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-09 03:02:44,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980707685] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:02:44,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:02:44,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 36 [2025-01-09 03:02:44,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690392378] [2025-01-09 03:02:44,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:02:44,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-01-09 03:02:44,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:02:44,622 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-01-09 03:02:44,622 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2025-01-09 03:02:44,622 INFO L87 Difference]: Start difference. First operand 276 states and 399 transitions. Second operand has 36 states, 36 states have (on average 1.25) internal successors, (45), 36 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) [2025-01-09 03:02:59,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:02:59,451 INFO L93 Difference]: Finished difference Result 882 states and 1275 transitions. [2025-01-09 03:02:59,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2025-01-09 03:02:59,452 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.25) internal successors, (45), 36 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 26 [2025-01-09 03:02:59,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:02:59,455 INFO L225 Difference]: With dead ends: 882 [2025-01-09 03:02:59,455 INFO L226 Difference]: Without dead ends: 825 [2025-01-09 03:02:59,459 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14505 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=8344, Invalid=26812, Unknown=0, NotChecked=0, Total=35156 [2025-01-09 03:02:59,459 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 1175 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 1757 mSolverCounterSat, 784 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1175 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 2541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 784 IncrementalHoareTripleChecker+Valid, 1757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2025-01-09 03:02:59,459 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1175 Valid, 233 Invalid, 2541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [784 Valid, 1757 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2025-01-09 03:02:59,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2025-01-09 03:02:59,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 295. [2025-01-09 03:02:59,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.445578231292517) internal successors, (425), 294 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:02:59,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 425 transitions. [2025-01-09 03:02:59,607 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 425 transitions. Word has length 26 [2025-01-09 03:02:59,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:02:59,607 INFO L471 AbstractCegarLoop]: Abstraction has 295 states and 425 transitions. [2025-01-09 03:02:59,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.25) internal successors, (45), 36 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) [2025-01-09 03:02:59,607 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 425 transitions. [2025-01-09 03:02:59,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-01-09 03:02:59,608 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:02:59,608 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:02:59,617 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 [2025-01-09 03:02:59,812 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 [2025-01-09 03:02:59,812 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:02:59,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:02:59,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1525550671, now seen corresponding path program 10 times [2025-01-09 03:02:59,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:02:59,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961571857] [2025-01-09 03:02:59,813 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 03:02:59,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:02:59,815 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-01-09 03:02:59,820 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-01-09 03:02:59,820 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 03:02:59,820 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:02:59,929 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2025-01-09 03:02:59,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:02:59,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961571857] [2025-01-09 03:02:59,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961571857] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:02:59,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306922935] [2025-01-09 03:02:59,929 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 03:02:59,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:02:59,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:02:59,932 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) [2025-01-09 03:02:59,941 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 [2025-01-09 03:02:59,968 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-01-09 03:02:59,980 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-01-09 03:02:59,980 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 03:02:59,980 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:02:59,981 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-01-09 03:02:59,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:03:00,039 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2025-01-09 03:03:00,040 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:03:00,194 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-01-09 03:03:00,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306922935] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:03:00,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:03:00,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 10] total 25 [2025-01-09 03:03:00,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114109810] [2025-01-09 03:03:00,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:03:00,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-01-09 03:03:00,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:03:00,195 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-01-09 03:03:00,196 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2025-01-09 03:03:00,196 INFO L87 Difference]: Start difference. First operand 295 states and 425 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:03:01,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:03:01,099 INFO L93 Difference]: Finished difference Result 425 states and 572 transitions. [2025-01-09 03:03:01,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-01-09 03:03:01,100 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 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 [2025-01-09 03:03:01,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:03:01,101 INFO L225 Difference]: With dead ends: 425 [2025-01-09 03:03:01,101 INFO L226 Difference]: Without dead ends: 378 [2025-01-09 03:03:01,102 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=301, Invalid=1955, Unknown=0, NotChecked=0, Total=2256 [2025-01-09 03:03:01,102 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-09 03:03:01,102 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 76 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-09 03:03:01,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2025-01-09 03:03:01,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 284. [2025-01-09 03:03:01,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 1.4346289752650176) internal successors, (406), 283 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:03:01,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 406 transitions. [2025-01-09 03:03:01,224 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 406 transitions. Word has length 26 [2025-01-09 03:03:01,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:03:01,225 INFO L471 AbstractCegarLoop]: Abstraction has 284 states and 406 transitions. [2025-01-09 03:03:01,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:03:01,225 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 406 transitions. [2025-01-09 03:03:01,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-01-09 03:03:01,225 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:03:01,225 INFO L218 NwaCegarLoop]: trace histogram [10, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:03:01,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-01-09 03:03:01,430 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 [2025-01-09 03:03:01,433 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:03:01,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:03:01,437 INFO L85 PathProgramCache]: Analyzing trace with hash -753050895, now seen corresponding path program 5 times [2025-01-09 03:03:01,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:03:01,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964760738] [2025-01-09 03:03:01,439 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 03:03:01,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:03:01,462 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 6 equivalence classes. [2025-01-09 03:03:01,502 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 26 of 26 statements. [2025-01-09 03:03:01,502 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-01-09 03:03:01,502 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:03:01,703 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-09 03:03:01,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:03:01,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964760738] [2025-01-09 03:03:01,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964760738] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:03:01,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682521198] [2025-01-09 03:03:01,704 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 03:03:01,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:03:01,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:03:01,706 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) [2025-01-09 03:03:01,707 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 [2025-01-09 03:03:01,736 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 6 equivalence classes. [2025-01-09 03:03:01,773 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 26 of 26 statements. [2025-01-09 03:03:01,774 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-01-09 03:03:01,774 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:03:01,774 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-01-09 03:03:01,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:03:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-01-09 03:03:01,863 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:03:02,111 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-01-09 03:03:02,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682521198] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:03:02,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:03:02,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 12] total 33 [2025-01-09 03:03:02,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474184696] [2025-01-09 03:03:02,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:03:02,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-01-09 03:03:02,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:03:02,112 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-01-09 03:03:02,112 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2025-01-09 03:03:02,112 INFO L87 Difference]: Start difference. First operand 284 states and 406 transitions. Second operand has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:03:02,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:03:02,883 INFO L93 Difference]: Finished difference Result 437 states and 572 transitions. [2025-01-09 03:03:02,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-01-09 03:03:02,883 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 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 [2025-01-09 03:03:02,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:03:02,885 INFO L225 Difference]: With dead ends: 437 [2025-01-09 03:03:02,885 INFO L226 Difference]: Without dead ends: 394 [2025-01-09 03:03:02,885 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=298, Invalid=1508, Unknown=0, NotChecked=0, Total=1806 [2025-01-09 03:03:02,886 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 51 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 03:03:02,886 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 78 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 03:03:02,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2025-01-09 03:03:03,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 259. [2025-01-09 03:03:03,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.4534883720930232) internal successors, (375), 258 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:03:03,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 375 transitions. [2025-01-09 03:03:03,003 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 375 transitions. Word has length 26 [2025-01-09 03:03:03,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:03:03,004 INFO L471 AbstractCegarLoop]: Abstraction has 259 states and 375 transitions. [2025-01-09 03:03:03,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:03:03,004 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 375 transitions. [2025-01-09 03:03:03,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-01-09 03:03:03,004 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:03:03,004 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:03:03,011 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 [2025-01-09 03:03:03,209 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 [2025-01-09 03:03:03,209 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:03:03,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:03:03,209 INFO L85 PathProgramCache]: Analyzing trace with hash -940930797, now seen corresponding path program 11 times [2025-01-09 03:03:03,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:03:03,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823448021] [2025-01-09 03:03:03,209 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 03:03:03,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:03:03,213 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 4 equivalence classes. [2025-01-09 03:03:03,244 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 27 of 27 statements. [2025-01-09 03:03:03,244 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-01-09 03:03:03,245 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:03:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-01-09 03:03:03,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:03:03,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823448021] [2025-01-09 03:03:03,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823448021] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:03:03,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700566026] [2025-01-09 03:03:03,420 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 03:03:03,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:03:03,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:03:03,422 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) [2025-01-09 03:03:03,423 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 [2025-01-09 03:03:03,444 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 4 equivalence classes. [2025-01-09 03:03:03,471 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 27 of 27 statements. [2025-01-09 03:03:03,471 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-01-09 03:03:03,471 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:03:03,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-01-09 03:03:03,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:03:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-01-09 03:03:03,500 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:03:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-01-09 03:03:03,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700566026] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:03:03,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:03:03,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2025-01-09 03:03:03,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266911649] [2025-01-09 03:03:03,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:03:03,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-09 03:03:03,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:03:03,587 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-09 03:03:03,587 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-01-09 03:03:03,587 INFO L87 Difference]: Start difference. First operand 259 states and 375 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:03:03,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:03:03,940 INFO L93 Difference]: Finished difference Result 297 states and 417 transitions. [2025-01-09 03:03:03,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-01-09 03:03:03,940 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2025-01-09 03:03:03,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:03:03,942 INFO L225 Difference]: With dead ends: 297 [2025-01-09 03:03:03,942 INFO L226 Difference]: Without dead ends: 294 [2025-01-09 03:03:03,942 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 12 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2025-01-09 03:03:03,942 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:03:03,943 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 97 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:03:03,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2025-01-09 03:03:04,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 279. [2025-01-09 03:03:04,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.4316546762589928) internal successors, (398), 278 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:03:04,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 398 transitions. [2025-01-09 03:03:04,078 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 398 transitions. Word has length 27 [2025-01-09 03:03:04,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:03:04,078 INFO L471 AbstractCegarLoop]: Abstraction has 279 states and 398 transitions. [2025-01-09 03:03:04,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:03:04,078 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 398 transitions. [2025-01-09 03:03:04,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-01-09 03:03:04,079 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:03:04,079 INFO L218 NwaCegarLoop]: trace histogram [10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:03:04,085 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 [2025-01-09 03:03:04,279 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 [2025-01-09 03:03:04,280 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:03:04,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:03:04,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1123375537, now seen corresponding path program 6 times [2025-01-09 03:03:04,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:03:04,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489301123] [2025-01-09 03:03:04,280 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 03:03:04,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:03:04,283 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 6 equivalence classes. [2025-01-09 03:03:04,290 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 28 of 28 statements. [2025-01-09 03:03:04,290 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-01-09 03:03:04,290 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:03:04,478 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-01-09 03:03:04,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:03:04,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489301123] [2025-01-09 03:03:04,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489301123] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:03:04,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688484698] [2025-01-09 03:03:04,479 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 03:03:04,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:03:04,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:03:04,487 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) [2025-01-09 03:03:04,488 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 [2025-01-09 03:03:04,512 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 6 equivalence classes. [2025-01-09 03:03:04,549 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 28 of 28 statements. [2025-01-09 03:03:04,549 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-01-09 03:03:04,549 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:03:04,549 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-01-09 03:03:04,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:03:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-01-09 03:03:04,630 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:03:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-01-09 03:03:05,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688484698] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:03:05,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:03:05,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 38 [2025-01-09 03:03:05,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128203453] [2025-01-09 03:03:05,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:03:05,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-01-09 03:03:05,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:03:05,031 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-01-09 03:03:05,031 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1150, Unknown=0, NotChecked=0, Total=1406 [2025-01-09 03:03:05,031 INFO L87 Difference]: Start difference. First operand 279 states and 398 transitions. Second operand has 38 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 38 states have internal predecessors, (46), 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)