./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_25-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/fibo_2calls_25-1.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1a779a25b3e5147f7c14d79ede7be3f2d2de62e2de15b88047fe2a162a63a762 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 15:57:34,328 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 15:57:34,401 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 15:57:34,406 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 15:57:34,406 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 15:57:34,430 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 15:57:34,431 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 15:57:34,431 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 15:57:34,432 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 15:57:34,432 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 15:57:34,432 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 15:57:34,432 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 15:57:34,433 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 15:57:34,433 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 15:57:34,433 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 15:57:34,434 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 15:57:34,434 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 15:57:34,434 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 15:57:34,434 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 15:57:34,434 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 15:57:34,434 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 15:57:34,434 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 15:57:34,435 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 15:57:34,435 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 15:57:34,435 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 15:57:34,435 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 15:57:34,435 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 15:57:34,435 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 15:57:34,435 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 15:57:34,435 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 15:57:34,436 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 15:57:34,436 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 15:57:34,436 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:57:34,436 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 15:57:34,436 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 15:57:34,436 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 15:57:34,436 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 15:57:34,436 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 15:57:34,436 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 15:57:34,436 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 15:57:34,437 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 15:57:34,437 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 15:57:34,437 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 15:57:34,437 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 -> 1a779a25b3e5147f7c14d79ede7be3f2d2de62e2de15b88047fe2a162a63a762 [2025-02-05 15:57:34,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 15:57:34,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 15:57:34,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 15:57:34,713 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 15:57:34,713 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 15:57:34,714 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_25-1.c [2025-02-05 15:57:36,004 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/18f513d95/29a1bab4f800416ca37fe261131e9cb3/FLAG986b9d017 [2025-02-05 15:57:36,228 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 15:57:36,229 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_25-1.c [2025-02-05 15:57:36,245 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/18f513d95/29a1bab4f800416ca37fe261131e9cb3/FLAG986b9d017 [2025-02-05 15:57:36,263 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/18f513d95/29a1bab4f800416ca37fe261131e9cb3 [2025-02-05 15:57:36,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 15:57:36,266 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 15:57:36,267 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 15:57:36,267 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 15:57:36,271 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 15:57:36,271 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:57:36" (1/1) ... [2025-02-05 15:57:36,272 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33bc6502 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:36, skipping insertion in model container [2025-02-05 15:57:36,272 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:57:36" (1/1) ... [2025-02-05 15:57:36,287 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 15:57:36,417 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_25-1.c[952,965] [2025-02-05 15:57:36,422 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:57:36,432 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 15:57:36,444 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_25-1.c[952,965] [2025-02-05 15:57:36,445 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:57:36,457 INFO L204 MainTranslator]: Completed translation [2025-02-05 15:57:36,458 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:36 WrapperNode [2025-02-05 15:57:36,459 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 15:57:36,460 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 15:57:36,460 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 15:57:36,460 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 15:57:36,466 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:36" (1/1) ... [2025-02-05 15:57:36,472 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:36" (1/1) ... [2025-02-05 15:57:36,483 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2025-02-05 15:57:36,484 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 15:57:36,484 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 15:57:36,485 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 15:57:36,485 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 15:57:36,490 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:36" (1/1) ... [2025-02-05 15:57:36,490 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:36" (1/1) ... [2025-02-05 15:57:36,492 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:36" (1/1) ... [2025-02-05 15:57:36,506 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-05 15:57:36,506 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:36" (1/1) ... [2025-02-05 15:57:36,507 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:36" (1/1) ... [2025-02-05 15:57:36,511 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:36" (1/1) ... [2025-02-05 15:57:36,512 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:36" (1/1) ... [2025-02-05 15:57:36,513 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:36" (1/1) ... [2025-02-05 15:57:36,517 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:36" (1/1) ... [2025-02-05 15:57:36,518 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 15:57:36,519 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 15:57:36,519 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 15:57:36,519 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 15:57:36,519 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:36" (1/1) ... [2025-02-05 15:57:36,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:57:36,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:36,555 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-05 15:57:36,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-05 15:57:36,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 15:57:36,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 15:57:36,582 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2025-02-05 15:57:36,583 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2025-02-05 15:57:36,583 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2025-02-05 15:57:36,583 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2025-02-05 15:57:36,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 15:57:36,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 15:57:36,627 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 15:57:36,629 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 15:57:36,701 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L25: havoc #t~ret6;havoc #t~ret7; [2025-02-05 15:57:36,717 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L15: havoc #t~ret4;havoc #t~ret5; [2025-02-05 15:57:36,724 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2025-02-05 15:57:36,724 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 15:57:36,732 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 15:57:36,734 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 15:57:36,734 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:57:36 BoogieIcfgContainer [2025-02-05 15:57:36,734 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 15:57:36,736 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 15:57:36,736 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 15:57:36,740 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 15:57:36,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 03:57:36" (1/3) ... [2025-02-05 15:57:36,740 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef9de97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:57:36, skipping insertion in model container [2025-02-05 15:57:36,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:57:36" (2/3) ... [2025-02-05 15:57:36,741 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef9de97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:57:36, skipping insertion in model container [2025-02-05 15:57:36,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:57:36" (3/3) ... [2025-02-05 15:57:36,742 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_2calls_25-1.c [2025-02-05 15:57:36,752 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 15:57:36,753 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_2calls_25-1.c that has 3 procedures, 29 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-02-05 15:57:36,796 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 15:57:36,810 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;@3687b348, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 15:57:36,811 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 15:57:36,814 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-05 15:57:36,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-02-05 15:57:36,820 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:36,821 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:36,821 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:36,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:36,826 INFO L85 PathProgramCache]: Analyzing trace with hash -402987893, now seen corresponding path program 1 times [2025-02-05 15:57:36,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:36,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265365470] [2025-02-05 15:57:36,833 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:36,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:36,889 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-05 15:57:36,903 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-05 15:57:36,904 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:36,904 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:37,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 15:57:37,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:37,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265365470] [2025-02-05 15:57:37,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265365470] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:57:37,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:57:37,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:57:37,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996425963] [2025-02-05 15:57:37,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:57:37,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:57:37,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:37,041 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:57:37,041 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:57:37,042 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 15:57:37,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:37,084 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2025-02-05 15:57:37,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:57:37,086 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2025-02-05 15:57:37,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:37,090 INFO L225 Difference]: With dead ends: 39 [2025-02-05 15:57:37,090 INFO L226 Difference]: Without dead ends: 27 [2025-02-05 15:57:37,092 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:57:37,094 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:37,095 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 124 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:57:37,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-02-05 15:57:37,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2025-02-05 15:57:37,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2025-02-05 15:57:37,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2025-02-05 15:57:37,123 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2025-02-05 15:57:37,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:37,124 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-02-05 15:57:37,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 15:57:37,124 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2025-02-05 15:57:37,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-02-05 15:57:37,125 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:37,125 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:37,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 15:57:37,125 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:37,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:37,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1356301235, now seen corresponding path program 1 times [2025-02-05 15:57:37,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:37,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011866385] [2025-02-05 15:57:37,126 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:37,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:37,131 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-05 15:57:37,137 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-05 15:57:37,138 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:37,138 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:37,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 15:57:37,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:37,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011866385] [2025-02-05 15:57:37,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011866385] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:57:37,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:57:37,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:57:37,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292263148] [2025-02-05 15:57:37,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:57:37,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:57:37,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:37,205 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:57:37,205 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:57:37,205 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 15:57:37,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:37,227 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2025-02-05 15:57:37,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:57:37,229 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2025-02-05 15:57:37,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:37,230 INFO L225 Difference]: With dead ends: 33 [2025-02-05 15:57:37,230 INFO L226 Difference]: Without dead ends: 29 [2025-02-05 15:57:37,230 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:57:37,231 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:37,232 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:57:37,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-02-05 15:57:37,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2025-02-05 15:57:37,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2025-02-05 15:57:37,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2025-02-05 15:57:37,239 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2025-02-05 15:57:37,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:37,239 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-02-05 15:57:37,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 15:57:37,240 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2025-02-05 15:57:37,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-02-05 15:57:37,241 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:37,241 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:37,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-05 15:57:37,241 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:37,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:37,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1190707769, now seen corresponding path program 1 times [2025-02-05 15:57:37,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:37,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139092607] [2025-02-05 15:57:37,242 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:37,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:37,249 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-05 15:57:37,258 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-05 15:57:37,259 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:37,259 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:37,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 15:57:37,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:37,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139092607] [2025-02-05 15:57:37,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139092607] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:37,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547638342] [2025-02-05 15:57:37,387 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:37,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:37,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:37,391 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:37,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-05 15:57:37,430 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-05 15:57:37,449 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-05 15:57:37,449 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:37,449 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:37,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-05 15:57:37,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 15:57:37,563 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:37,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 15:57:37,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547638342] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:37,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:37,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2025-02-05 15:57:37,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325199968] [2025-02-05 15:57:37,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:37,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 15:57:37,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:37,811 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 15:57:37,811 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2025-02-05 15:57:37,811 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-05 15:57:37,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:37,949 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2025-02-05 15:57:37,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 15:57:37,950 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2025-02-05 15:57:37,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:37,951 INFO L225 Difference]: With dead ends: 55 [2025-02-05 15:57:37,951 INFO L226 Difference]: Without dead ends: 31 [2025-02-05 15:57:37,952 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2025-02-05 15:57:37,952 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:37,952 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 105 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:37,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-02-05 15:57:37,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2025-02-05 15:57:37,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2025-02-05 15:57:37,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2025-02-05 15:57:37,963 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2025-02-05 15:57:37,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:37,964 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2025-02-05 15:57:37,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-05 15:57:37,964 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2025-02-05 15:57:37,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-02-05 15:57:37,965 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:37,965 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:37,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-05 15:57:38,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:38,166 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:38,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:38,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1027112458, now seen corresponding path program 1 times [2025-02-05 15:57:38,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:38,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557525348] [2025-02-05 15:57:38,166 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:38,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:38,174 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-05 15:57:38,190 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-05 15:57:38,190 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:38,190 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:38,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 15:57:38,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:38,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557525348] [2025-02-05 15:57:38,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557525348] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:38,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877149002] [2025-02-05 15:57:38,306 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:38,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:38,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:38,309 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:38,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-05 15:57:38,337 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-05 15:57:38,350 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-05 15:57:38,350 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:38,350 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:38,352 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-05 15:57:38,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 15:57:38,390 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 15:57:38,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877149002] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:38,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:38,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2025-02-05 15:57:38,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255918974] [2025-02-05 15:57:38,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:38,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-05 15:57:38,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:38,588 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-05 15:57:38,590 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-02-05 15:57:38,590 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-05 15:57:38,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:38,719 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2025-02-05 15:57:38,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-05 15:57:38,719 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2025-02-05 15:57:38,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:38,720 INFO L225 Difference]: With dead ends: 40 [2025-02-05 15:57:38,720 INFO L226 Difference]: Without dead ends: 36 [2025-02-05 15:57:38,721 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-02-05 15:57:38,721 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:38,721 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 135 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:38,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-02-05 15:57:38,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2025-02-05 15:57:38,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2025-02-05 15:57:38,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2025-02-05 15:57:38,733 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 24 [2025-02-05 15:57:38,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:38,733 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2025-02-05 15:57:38,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-05 15:57:38,734 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2025-02-05 15:57:38,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-02-05 15:57:38,735 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:38,735 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:38,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-05 15:57:38,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:38,936 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:38,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:38,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1200844378, now seen corresponding path program 1 times [2025-02-05 15:57:38,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:38,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650868939] [2025-02-05 15:57:38,936 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:38,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:38,947 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-02-05 15:57:38,957 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-02-05 15:57:38,960 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:38,960 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 15:57:39,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:39,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650868939] [2025-02-05 15:57:39,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650868939] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:39,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869597943] [2025-02-05 15:57:39,042 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:39,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:39,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:39,047 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:39,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-05 15:57:39,072 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-02-05 15:57:39,086 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-02-05 15:57:39,086 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:39,086 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:39,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-05 15:57:39,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:39,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 15:57:39,183 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:39,548 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 15:57:39,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869597943] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:39,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:39,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 14 [2025-02-05 15:57:39,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472166342] [2025-02-05 15:57:39,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:39,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-05 15:57:39,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:39,549 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-05 15:57:39,551 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2025-02-05 15:57:39,551 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2025-02-05 15:57:39,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:39,708 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2025-02-05 15:57:39,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-05 15:57:39,708 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2025-02-05 15:57:39,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:39,709 INFO L225 Difference]: With dead ends: 69 [2025-02-05 15:57:39,709 INFO L226 Difference]: Without dead ends: 38 [2025-02-05 15:57:39,710 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2025-02-05 15:57:39,711 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:39,711 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 146 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:39,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-02-05 15:57:39,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2025-02-05 15:57:39,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.173913043478261) internal successors, (27), 26 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2025-02-05 15:57:39,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2025-02-05 15:57:39,718 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 36 [2025-02-05 15:57:39,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:39,719 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2025-02-05 15:57:39,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2025-02-05 15:57:39,719 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2025-02-05 15:57:39,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-05 15:57:39,721 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:39,721 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:39,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-05 15:57:39,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:39,926 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:39,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:39,926 INFO L85 PathProgramCache]: Analyzing trace with hash -255039370, now seen corresponding path program 1 times [2025-02-05 15:57:39,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:39,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536754276] [2025-02-05 15:57:39,927 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:39,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:39,931 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-05 15:57:39,937 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 15:57:39,938 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:39,938 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:40,053 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-05 15:57:40,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:40,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536754276] [2025-02-05 15:57:40,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536754276] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:40,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859548341] [2025-02-05 15:57:40,054 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:40,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:40,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:40,057 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:40,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-05 15:57:40,089 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-05 15:57:40,105 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 15:57:40,105 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:40,105 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:40,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-05 15:57:40,108 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:40,192 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 15:57:40,193 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:40,537 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 15:57:40,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859548341] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:40,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:40,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2025-02-05 15:57:40,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393415681] [2025-02-05 15:57:40,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:40,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-05 15:57:40,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:40,538 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-05 15:57:40,538 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2025-02-05 15:57:40,538 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2025-02-05 15:57:40,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:40,934 INFO L93 Difference]: Finished difference Result 101 states and 161 transitions. [2025-02-05 15:57:40,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-05 15:57:40,934 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 37 [2025-02-05 15:57:40,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:40,936 INFO L225 Difference]: With dead ends: 101 [2025-02-05 15:57:40,936 INFO L226 Difference]: Without dead ends: 68 [2025-02-05 15:57:40,937 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2025-02-05 15:57:40,938 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 39 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:40,938 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 300 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 15:57:40,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-02-05 15:57:40,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2025-02-05 15:57:40,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 39 states have internal predecessors, (41), 11 states have call successors, (11), 3 states have call predecessors, (11), 9 states have return successors, (34), 13 states have call predecessors, (34), 11 states have call successors, (34) [2025-02-05 15:57:40,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 86 transitions. [2025-02-05 15:57:40,951 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 86 transitions. Word has length 37 [2025-02-05 15:57:40,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:40,951 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 86 transitions. [2025-02-05 15:57:40,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2025-02-05 15:57:40,952 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 86 transitions. [2025-02-05 15:57:40,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-02-05 15:57:40,953 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:40,953 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:40,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-05 15:57:41,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-02-05 15:57:41,154 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:41,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:41,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1862824006, now seen corresponding path program 1 times [2025-02-05 15:57:41,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:41,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385922236] [2025-02-05 15:57:41,157 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:41,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:41,165 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-02-05 15:57:41,173 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-02-05 15:57:41,173 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:41,173 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:41,271 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-02-05 15:57:41,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:41,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385922236] [2025-02-05 15:57:41,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385922236] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:41,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732777677] [2025-02-05 15:57:41,271 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:41,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:41,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:41,274 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:41,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-05 15:57:41,301 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-02-05 15:57:41,329 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-02-05 15:57:41,329 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:41,329 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:41,329 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-05 15:57:41,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-05 15:57:41,410 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 15:57:41,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732777677] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:41,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:41,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2025-02-05 15:57:41,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157136369] [2025-02-05 15:57:41,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:41,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-05 15:57:41,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:41,890 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-05 15:57:41,890 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2025-02-05 15:57:41,890 INFO L87 Difference]: Start difference. First operand 56 states and 86 transitions. Second operand has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2025-02-05 15:57:42,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:42,088 INFO L93 Difference]: Finished difference Result 102 states and 193 transitions. [2025-02-05 15:57:42,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-05 15:57:42,089 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) Word has length 51 [2025-02-05 15:57:42,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:42,091 INFO L225 Difference]: With dead ends: 102 [2025-02-05 15:57:42,091 INFO L226 Difference]: Without dead ends: 98 [2025-02-05 15:57:42,092 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2025-02-05 15:57:42,093 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:42,093 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 161 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:42,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-02-05 15:57:42,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2025-02-05 15:57:42,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.15) internal successors, (46), 44 states have internal predecessors, (46), 12 states have call successors, (12), 3 states have call predecessors, (12), 11 states have return successors, (48), 16 states have call predecessors, (48), 12 states have call successors, (48) [2025-02-05 15:57:42,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 106 transitions. [2025-02-05 15:57:42,126 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 106 transitions. Word has length 51 [2025-02-05 15:57:42,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:42,127 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 106 transitions. [2025-02-05 15:57:42,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2025-02-05 15:57:42,127 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 106 transitions. [2025-02-05 15:57:42,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2025-02-05 15:57:42,130 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:42,130 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:42,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-05 15:57:42,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:42,330 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:42,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:42,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1518497941, now seen corresponding path program 1 times [2025-02-05 15:57:42,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:42,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094030968] [2025-02-05 15:57:42,331 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:42,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:42,337 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 80 statements into 1 equivalence classes. [2025-02-05 15:57:42,349 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 80 of 80 statements. [2025-02-05 15:57:42,349 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:42,349 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 39 proven. 42 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-02-05 15:57:42,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:42,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094030968] [2025-02-05 15:57:42,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094030968] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:42,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769815092] [2025-02-05 15:57:42,510 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:42,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:42,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:42,512 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:42,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-05 15:57:42,548 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 80 statements into 1 equivalence classes. [2025-02-05 15:57:42,568 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 80 of 80 statements. [2025-02-05 15:57:42,568 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:42,568 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:42,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-05 15:57:42,571 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 12 proven. 71 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2025-02-05 15:57:42,706 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:43,441 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 12 proven. 81 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2025-02-05 15:57:43,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769815092] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:43,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:43,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 23 [2025-02-05 15:57:43,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497147850] [2025-02-05 15:57:43,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:43,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-05 15:57:43,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:43,443 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-05 15:57:43,443 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2025-02-05 15:57:43,443 INFO L87 Difference]: Start difference. First operand 64 states and 106 transitions. Second operand has 23 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 23 states have internal predecessors, (73), 18 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (25), 10 states have call predecessors, (25), 18 states have call successors, (25) [2025-02-05 15:57:44,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:44,020 INFO L93 Difference]: Finished difference Result 177 states and 369 transitions. [2025-02-05 15:57:44,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-02-05 15:57:44,021 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 23 states have internal predecessors, (73), 18 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (25), 10 states have call predecessors, (25), 18 states have call successors, (25) Word has length 80 [2025-02-05 15:57:44,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:44,023 INFO L225 Difference]: With dead ends: 177 [2025-02-05 15:57:44,023 INFO L226 Difference]: Without dead ends: 104 [2025-02-05 15:57:44,025 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 148 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2025-02-05 15:57:44,025 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 78 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:44,026 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 395 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-05 15:57:44,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-02-05 15:57:44,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2025-02-05 15:57:44,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 64 states have internal predecessors, (73), 16 states have call successors, (16), 8 states have call predecessors, (16), 14 states have return successors, (43), 20 states have call predecessors, (43), 16 states have call successors, (43) [2025-02-05 15:57:44,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 132 transitions. [2025-02-05 15:57:44,047 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 132 transitions. Word has length 80 [2025-02-05 15:57:44,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:44,047 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 132 transitions. [2025-02-05 15:57:44,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 23 states have internal predecessors, (73), 18 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (25), 10 states have call predecessors, (25), 18 states have call successors, (25) [2025-02-05 15:57:44,048 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 132 transitions. [2025-02-05 15:57:44,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2025-02-05 15:57:44,058 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:44,058 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 10, 8, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:44,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-05 15:57:44,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-02-05 15:57:44,259 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:44,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:44,259 INFO L85 PathProgramCache]: Analyzing trace with hash -966893141, now seen corresponding path program 1 times [2025-02-05 15:57:44,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:44,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093772106] [2025-02-05 15:57:44,260 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:44,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:44,268 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 160 statements into 1 equivalence classes. [2025-02-05 15:57:44,292 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 160 of 160 statements. [2025-02-05 15:57:44,293 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:44,293 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 47 proven. 183 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2025-02-05 15:57:44,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:44,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093772106] [2025-02-05 15:57:44,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093772106] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:44,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652922104] [2025-02-05 15:57:44,521 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:57:44,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:44,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:44,525 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:44,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-05 15:57:44,575 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 160 statements into 1 equivalence classes. [2025-02-05 15:57:44,612 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 160 of 160 statements. [2025-02-05 15:57:44,612 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:44,612 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:44,614 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 15:57:44,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 34 proven. 239 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2025-02-05 15:57:44,739 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:45,897 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 34 proven. 255 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2025-02-05 15:57:45,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652922104] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:45,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:45,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 23 [2025-02-05 15:57:45,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531035184] [2025-02-05 15:57:45,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:45,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-05 15:57:45,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:45,899 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-05 15:57:45,899 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2025-02-05 15:57:45,900 INFO L87 Difference]: Start difference. First operand 93 states and 132 transitions. Second operand has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2025-02-05 15:57:46,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:46,151 INFO L93 Difference]: Finished difference Result 132 states and 227 transitions. [2025-02-05 15:57:46,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-05 15:57:46,152 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) Word has length 160 [2025-02-05 15:57:46,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:46,154 INFO L225 Difference]: With dead ends: 132 [2025-02-05 15:57:46,154 INFO L226 Difference]: Without dead ends: 128 [2025-02-05 15:57:46,155 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 304 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2025-02-05 15:57:46,155 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:46,156 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 188 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:57:46,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2025-02-05 15:57:46,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2025-02-05 15:57:46,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 79 states have internal predecessors, (88), 21 states have call successors, (21), 8 states have call predecessors, (21), 19 states have return successors, (85), 30 states have call predecessors, (85), 21 states have call successors, (85) [2025-02-05 15:57:46,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 194 transitions. [2025-02-05 15:57:46,175 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 194 transitions. Word has length 160 [2025-02-05 15:57:46,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:46,175 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 194 transitions. [2025-02-05 15:57:46,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2025-02-05 15:57:46,176 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 194 transitions. [2025-02-05 15:57:46,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2025-02-05 15:57:46,180 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:46,180 INFO L218 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 21, 20, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 8, 8, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:46,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-05 15:57:46,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:46,384 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:46,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:46,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1486660373, now seen corresponding path program 2 times [2025-02-05 15:57:46,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:46,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526903850] [2025-02-05 15:57:46,385 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:57:46,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:46,406 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 351 statements into 2 equivalence classes. [2025-02-05 15:57:46,447 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 351 of 351 statements. [2025-02-05 15:57:46,447 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:57:46,447 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:46,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3476 backedges. 105 proven. 737 refuted. 0 times theorem prover too weak. 2634 trivial. 0 not checked. [2025-02-05 15:57:46,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:46,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526903850] [2025-02-05 15:57:46,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526903850] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:46,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075668185] [2025-02-05 15:57:46,986 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:57:46,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:46,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:46,989 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:46,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-05 15:57:47,084 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 351 statements into 2 equivalence classes. [2025-02-05 15:57:47,161 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 351 of 351 statements. [2025-02-05 15:57:47,161 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:57:47,162 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:47,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-05 15:57:47,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:47,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3476 backedges. 105 proven. 737 refuted. 0 times theorem prover too weak. 2634 trivial. 0 not checked. [2025-02-05 15:57:47,252 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3476 backedges. 105 proven. 761 refuted. 0 times theorem prover too weak. 2610 trivial. 0 not checked. [2025-02-05 15:57:49,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075668185] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:49,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:49,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 20 [2025-02-05 15:57:49,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017234461] [2025-02-05 15:57:49,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:49,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-05 15:57:49,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:49,155 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-05 15:57:49,155 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2025-02-05 15:57:49,156 INFO L87 Difference]: Start difference. First operand 118 states and 194 transitions. Second operand has 20 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 20 states have internal predecessors, (69), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) [2025-02-05 15:57:49,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:49,345 INFO L93 Difference]: Finished difference Result 148 states and 283 transitions. [2025-02-05 15:57:49,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-05 15:57:49,345 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 20 states have internal predecessors, (69), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) Word has length 351 [2025-02-05 15:57:49,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:49,349 INFO L225 Difference]: With dead ends: 148 [2025-02-05 15:57:49,349 INFO L226 Difference]: Without dead ends: 144 [2025-02-05 15:57:49,349 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 692 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2025-02-05 15:57:49,350 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:49,350 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 188 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:49,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2025-02-05 15:57:49,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2025-02-05 15:57:49,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 76 states have internal predecessors, (85), 20 states have call successors, (20), 8 states have call predecessors, (20), 18 states have return successors, (75), 28 states have call predecessors, (75), 20 states have call successors, (75) [2025-02-05 15:57:49,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 180 transitions. [2025-02-05 15:57:49,372 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 180 transitions. Word has length 351 [2025-02-05 15:57:49,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:49,373 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 180 transitions. [2025-02-05 15:57:49,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 20 states have internal predecessors, (69), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) [2025-02-05 15:57:49,373 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 180 transitions. [2025-02-05 15:57:49,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2025-02-05 15:57:49,380 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:49,380 INFO L218 NwaCegarLoop]: trace histogram [32, 32, 29, 29, 25, 22, 16, 16, 16, 16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 14, 11, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:49,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-05 15:57:49,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:49,584 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:49,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:49,584 INFO L85 PathProgramCache]: Analyzing trace with hash -2058209874, now seen corresponding path program 3 times [2025-02-05 15:57:49,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:49,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997887496] [2025-02-05 15:57:49,585 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:57:49,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:49,607 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 417 statements into 24 equivalence classes. [2025-02-05 15:57:49,617 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 50 of 417 statements. [2025-02-05 15:57:49,619 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 15:57:49,620 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4983 backedges. 566 proven. 4 refuted. 0 times theorem prover too weak. 4413 trivial. 0 not checked. [2025-02-05 15:57:49,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:49,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997887496] [2025-02-05 15:57:49,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997887496] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:49,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753253158] [2025-02-05 15:57:49,716 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:57:49,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:49,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:49,718 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:49,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-05 15:57:49,831 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 417 statements into 24 equivalence classes. [2025-02-05 15:57:49,847 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 50 of 417 statements. [2025-02-05 15:57:49,847 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 15:57:49,847 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:49,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-05 15:57:49,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:49,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4983 backedges. 813 proven. 6 refuted. 0 times theorem prover too weak. 4164 trivial. 0 not checked. [2025-02-05 15:57:49,920 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:51,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4983 backedges. 671 proven. 12 refuted. 0 times theorem prover too weak. 4300 trivial. 0 not checked. [2025-02-05 15:57:51,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753253158] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:51,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:51,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2025-02-05 15:57:51,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348279276] [2025-02-05 15:57:51,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:51,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-05 15:57:51,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:51,065 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-05 15:57:51,065 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2025-02-05 15:57:51,065 INFO L87 Difference]: Start difference. First operand 113 states and 180 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 7 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (17), 5 states have call predecessors, (17), 7 states have call successors, (17) [2025-02-05 15:57:51,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:51,198 INFO L93 Difference]: Finished difference Result 220 states and 380 transitions. [2025-02-05 15:57:51,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 15:57:51,198 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 7 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (17), 5 states have call predecessors, (17), 7 states have call successors, (17) Word has length 417 [2025-02-05 15:57:51,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:51,200 INFO L225 Difference]: With dead ends: 220 [2025-02-05 15:57:51,200 INFO L226 Difference]: Without dead ends: 115 [2025-02-05 15:57:51,202 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 823 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2025-02-05 15:57:51,202 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:51,202 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 201 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:51,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2025-02-05 15:57:51,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 110. [2025-02-05 15:57:51,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 73 states have internal predecessors, (85), 19 states have call successors, (19), 10 states have call predecessors, (19), 16 states have return successors, (65), 26 states have call predecessors, (65), 19 states have call successors, (65) [2025-02-05 15:57:51,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 169 transitions. [2025-02-05 15:57:51,219 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 169 transitions. Word has length 417 [2025-02-05 15:57:51,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:51,219 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 169 transitions. [2025-02-05 15:57:51,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 7 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (17), 5 states have call predecessors, (17), 7 states have call successors, (17) [2025-02-05 15:57:51,220 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 169 transitions. [2025-02-05 15:57:51,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 585 [2025-02-05 15:57:51,224 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:51,224 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 39, 39, 36, 34, 23, 23, 23, 23, 23, 23, 23, 19, 19, 19, 19, 19, 19, 19, 17, 11, 10, 5, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:51,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-05 15:57:51,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:51,429 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:51,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:51,429 INFO L85 PathProgramCache]: Analyzing trace with hash 63406171, now seen corresponding path program 4 times [2025-02-05 15:57:51,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:51,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708104523] [2025-02-05 15:57:51,430 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:57:51,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:51,448 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 584 statements into 2 equivalence classes. [2025-02-05 15:57:51,490 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 496 of 584 statements. [2025-02-05 15:57:51,490 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:57:51,490 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9991 backedges. 255 proven. 1037 refuted. 0 times theorem prover too weak. 8699 trivial. 0 not checked. [2025-02-05 15:57:51,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:51,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708104523] [2025-02-05 15:57:51,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708104523] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:51,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488266456] [2025-02-05 15:57:51,857 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:57:51,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:51,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:51,859 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:51,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-05 15:57:51,974 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 584 statements into 2 equivalence classes. [2025-02-05 15:57:52,067 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 496 of 584 statements. [2025-02-05 15:57:52,067 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:57:52,067 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:52,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-05 15:57:52,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:52,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9991 backedges. 1918 proven. 19 refuted. 0 times theorem prover too weak. 8054 trivial. 0 not checked. [2025-02-05 15:57:52,143 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:53,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9991 backedges. 255 proven. 1195 refuted. 0 times theorem prover too weak. 8541 trivial. 0 not checked. [2025-02-05 15:57:53,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488266456] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:53,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:53,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 17 [2025-02-05 15:57:53,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457530065] [2025-02-05 15:57:53,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:53,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-05 15:57:53,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:53,899 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-05 15:57:53,899 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2025-02-05 15:57:53,900 INFO L87 Difference]: Start difference. First operand 110 states and 169 transitions. Second operand has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 10 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (23), 6 states have call predecessors, (23), 10 states have call successors, (23) [2025-02-05 15:57:54,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:54,061 INFO L93 Difference]: Finished difference Result 214 states and 356 transitions. [2025-02-05 15:57:54,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-05 15:57:54,061 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 10 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (23), 6 states have call predecessors, (23), 10 states have call successors, (23) Word has length 584 [2025-02-05 15:57:54,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:54,062 INFO L225 Difference]: With dead ends: 214 [2025-02-05 15:57:54,062 INFO L226 Difference]: Without dead ends: 110 [2025-02-05 15:57:54,063 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1183 GetRequests, 1157 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2025-02-05 15:57:54,064 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 26 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:54,064 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 213 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:54,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2025-02-05 15:57:54,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2025-02-05 15:57:54,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 72 states have (on average 1.125) internal successors, (81), 73 states have internal predecessors, (81), 18 states have call successors, (18), 9 states have call predecessors, (18), 17 states have return successors, (57), 25 states have call predecessors, (57), 18 states have call successors, (57) [2025-02-05 15:57:54,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 156 transitions. [2025-02-05 15:57:54,076 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 156 transitions. Word has length 584 [2025-02-05 15:57:54,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:54,076 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 156 transitions. [2025-02-05 15:57:54,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 10 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (23), 6 states have call predecessors, (23), 10 states have call successors, (23) [2025-02-05 15:57:54,077 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 156 transitions. [2025-02-05 15:57:54,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2025-02-05 15:57:54,079 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:54,080 INFO L218 NwaCegarLoop]: trace histogram [41, 41, 38, 38, 33, 30, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 14, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:54,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-05 15:57:54,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-05 15:57:54,280 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:54,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:54,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1000311849, now seen corresponding path program 5 times [2025-02-05 15:57:54,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:54,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760052233] [2025-02-05 15:57:54,281 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:57:54,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:54,310 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 541 statements into 33 equivalence classes. [2025-02-05 15:57:54,357 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) and asserted 286 of 541 statements. [2025-02-05 15:57:54,357 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2025-02-05 15:57:54,358 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8499 backedges. 356 proven. 1225 refuted. 0 times theorem prover too weak. 6918 trivial. 0 not checked. [2025-02-05 15:57:54,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:54,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760052233] [2025-02-05 15:57:54,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760052233] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:54,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644394061] [2025-02-05 15:57:54,652 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:57:54,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:54,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:54,654 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:54,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-05 15:57:54,764 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 541 statements into 33 equivalence classes. [2025-02-05 15:57:54,842 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) and asserted 286 of 541 statements. [2025-02-05 15:57:54,842 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2025-02-05 15:57:54,842 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:54,844 INFO L256 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 15:57:54,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:54,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8499 backedges. 3444 proven. 111 refuted. 0 times theorem prover too weak. 4944 trivial. 0 not checked. [2025-02-05 15:57:54,913 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:56,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8499 backedges. 355 proven. 1257 refuted. 0 times theorem prover too weak. 6887 trivial. 0 not checked. [2025-02-05 15:57:56,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644394061] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:56,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:56,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 15] total 20 [2025-02-05 15:57:56,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605073016] [2025-02-05 15:57:56,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:56,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-05 15:57:56,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:56,675 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-05 15:57:56,675 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2025-02-05 15:57:56,676 INFO L87 Difference]: Start difference. First operand 108 states and 156 transitions. Second operand has 20 states, 20 states have (on average 4.45) internal successors, (89), 20 states have internal predecessors, (89), 13 states have call successors, (27), 2 states have call predecessors, (27), 9 states have return successors, (31), 12 states have call predecessors, (31), 13 states have call successors, (31) [2025-02-05 15:57:57,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:57,085 INFO L93 Difference]: Finished difference Result 238 states and 427 transitions. [2025-02-05 15:57:57,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-05 15:57:57,086 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.45) internal successors, (89), 20 states have internal predecessors, (89), 13 states have call successors, (27), 2 states have call predecessors, (27), 9 states have return successors, (31), 12 states have call predecessors, (31), 13 states have call successors, (31) Word has length 541 [2025-02-05 15:57:57,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:57,088 INFO L225 Difference]: With dead ends: 238 [2025-02-05 15:57:57,088 INFO L226 Difference]: Without dead ends: 120 [2025-02-05 15:57:57,090 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1111 GetRequests, 1070 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=230, Invalid=1030, Unknown=0, NotChecked=0, Total=1260 [2025-02-05 15:57:57,091 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 48 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:57,091 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 304 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:57:57,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2025-02-05 15:57:57,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 109. [2025-02-05 15:57:57,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 73 states have internal predecessors, (82), 18 states have call successors, (18), 11 states have call predecessors, (18), 16 states have return successors, (56), 24 states have call predecessors, (56), 18 states have call successors, (56) [2025-02-05 15:57:57,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 156 transitions. [2025-02-05 15:57:57,108 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 156 transitions. Word has length 541 [2025-02-05 15:57:57,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:57,109 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 156 transitions. [2025-02-05 15:57:57,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.45) internal successors, (89), 20 states have internal predecessors, (89), 13 states have call successors, (27), 2 states have call predecessors, (27), 9 states have return successors, (31), 12 states have call predecessors, (31), 13 states have call successors, (31) [2025-02-05 15:57:57,109 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 156 transitions. [2025-02-05 15:57:57,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2025-02-05 15:57:57,114 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:57,114 INFO L218 NwaCegarLoop]: trace histogram [36, 36, 35, 35, 29, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 11, 10, 9, 6, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:57,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-05 15:57:57,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-02-05 15:57:57,318 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:57,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:57,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1913663824, now seen corresponding path program 6 times [2025-02-05 15:57:57,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:57,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967472085] [2025-02-05 15:57:57,318 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 15:57:57,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:57,341 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 486 statements into 27 equivalence classes. [2025-02-05 15:57:57,383 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) and asserted 241 of 486 statements. [2025-02-05 15:57:57,383 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2025-02-05 15:57:57,383 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:57,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6813 backedges. 750 proven. 108 refuted. 0 times theorem prover too weak. 5955 trivial. 0 not checked. [2025-02-05 15:57:57,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:57:57,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967472085] [2025-02-05 15:57:57,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967472085] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:57:57,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85489146] [2025-02-05 15:57:57,597 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 15:57:57,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:57,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:57:57,599 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:57:57,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-05 15:57:57,730 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 486 statements into 27 equivalence classes. [2025-02-05 15:57:57,797 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) and asserted 241 of 486 statements. [2025-02-05 15:57:57,797 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2025-02-05 15:57:57,797 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:57:57,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-05 15:57:57,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:57:57,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6813 backedges. 771 proven. 111 refuted. 0 times theorem prover too weak. 5931 trivial. 0 not checked. [2025-02-05 15:57:57,874 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:57:59,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6813 backedges. 775 proven. 117 refuted. 0 times theorem prover too weak. 5921 trivial. 0 not checked. [2025-02-05 15:57:59,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85489146] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:57:59,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:57:59,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 18 [2025-02-05 15:57:59,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988288793] [2025-02-05 15:57:59,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:57:59,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-05 15:57:59,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:57:59,338 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-05 15:57:59,338 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2025-02-05 15:57:59,339 INFO L87 Difference]: Start difference. First operand 109 states and 156 transitions. Second operand has 18 states, 16 states have (on average 3.875) internal successors, (62), 18 states have internal predecessors, (62), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 10 states have call predecessors, (21), 11 states have call successors, (21) [2025-02-05 15:57:59,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:57:59,503 INFO L93 Difference]: Finished difference Result 138 states and 224 transitions. [2025-02-05 15:57:59,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-05 15:57:59,503 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.875) internal successors, (62), 18 states have internal predecessors, (62), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 10 states have call predecessors, (21), 11 states have call successors, (21) Word has length 486 [2025-02-05 15:57:59,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:57:59,507 INFO L225 Difference]: With dead ends: 138 [2025-02-05 15:57:59,507 INFO L226 Difference]: Without dead ends: 134 [2025-02-05 15:57:59,507 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 987 GetRequests, 962 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2025-02-05 15:57:59,508 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 39 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:57:59,508 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 135 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:57:59,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2025-02-05 15:57:59,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 122. [2025-02-05 15:57:59,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 82 states have (on average 1.1097560975609757) internal successors, (91), 81 states have internal predecessors, (91), 22 states have call successors, (22), 12 states have call predecessors, (22), 17 states have return successors, (80), 28 states have call predecessors, (80), 22 states have call successors, (80) [2025-02-05 15:57:59,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 193 transitions. [2025-02-05 15:57:59,523 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 193 transitions. Word has length 486 [2025-02-05 15:57:59,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:57:59,525 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 193 transitions. [2025-02-05 15:57:59,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.875) internal successors, (62), 18 states have internal predecessors, (62), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 10 states have call predecessors, (21), 11 states have call successors, (21) [2025-02-05 15:57:59,525 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 193 transitions. [2025-02-05 15:57:59,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 842 [2025-02-05 15:57:59,531 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:57:59,531 INFO L218 NwaCegarLoop]: trace histogram [62, 62, 61, 61, 53, 46, 31, 31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 30, 30, 22, 16, 16, 8, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:57:59,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-05 15:57:59,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:57:59,732 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:57:59,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:57:59,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1705340457, now seen corresponding path program 7 times [2025-02-05 15:57:59,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:57:59,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712021051] [2025-02-05 15:57:59,732 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 15:57:59,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:57:59,752 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 841 statements into 1 equivalence classes. [2025-02-05 15:57:59,825 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 841 of 841 statements. [2025-02-05 15:57:59,825 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:57:59,825 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:00,772 INFO L134 CoverageAnalysis]: Checked inductivity of 20897 backedges. 327 proven. 2224 refuted. 0 times theorem prover too weak. 18346 trivial. 0 not checked. [2025-02-05 15:58:00,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:58:00,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712021051] [2025-02-05 15:58:00,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712021051] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:58:00,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471359656] [2025-02-05 15:58:00,773 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 15:58:00,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:00,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:58:00,775 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:58:00,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-05 15:58:00,930 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 841 statements into 1 equivalence classes. [2025-02-05 15:58:01,109 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 841 of 841 statements. [2025-02-05 15:58:01,110 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:58:01,110 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:01,117 INFO L256 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-05 15:58:01,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:58:01,218 INFO L134 CoverageAnalysis]: Checked inductivity of 20897 backedges. 327 proven. 2224 refuted. 0 times theorem prover too weak. 18346 trivial. 0 not checked. [2025-02-05 15:58:01,218 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:58:04,568 INFO L134 CoverageAnalysis]: Checked inductivity of 20897 backedges. 327 proven. 2257 refuted. 0 times theorem prover too weak. 18313 trivial. 0 not checked. [2025-02-05 15:58:04,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471359656] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:58:04,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:58:04,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 19] total 22 [2025-02-05 15:58:04,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744343942] [2025-02-05 15:58:04,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:58:04,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-05 15:58:04,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:58:04,570 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-05 15:58:04,570 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2025-02-05 15:58:04,571 INFO L87 Difference]: Start difference. First operand 122 states and 193 transitions. Second operand has 22 states, 20 states have (on average 3.75) internal successors, (75), 22 states have internal predecessors, (75), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) [2025-02-05 15:58:04,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:58:04,841 INFO L93 Difference]: Finished difference Result 171 states and 348 transitions. [2025-02-05 15:58:04,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-05 15:58:04,842 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.75) internal successors, (75), 22 states have internal predecessors, (75), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) Word has length 841 [2025-02-05 15:58:04,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:58:04,846 INFO L225 Difference]: With dead ends: 171 [2025-02-05 15:58:04,846 INFO L226 Difference]: Without dead ends: 167 [2025-02-05 15:58:04,847 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1706 GetRequests, 1671 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2025-02-05 15:58:04,847 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:58:04,847 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 188 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:58:04,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2025-02-05 15:58:04,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 149. [2025-02-05 15:58:04,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 98 states have (on average 1.0918367346938775) internal successors, (107), 97 states have internal predecessors, (107), 28 states have call successors, (28), 12 states have call predecessors, (28), 22 states have return successors, (141), 39 states have call predecessors, (141), 28 states have call successors, (141) [2025-02-05 15:58:04,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 276 transitions. [2025-02-05 15:58:04,873 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 276 transitions. Word has length 841 [2025-02-05 15:58:04,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:58:04,874 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 276 transitions. [2025-02-05 15:58:04,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.75) internal successors, (75), 22 states have internal predecessors, (75), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) [2025-02-05 15:58:04,874 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 276 transitions. [2025-02-05 15:58:04,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 951 [2025-02-05 15:58:04,887 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:58:04,887 INFO L218 NwaCegarLoop]: trace histogram [74, 74, 65, 65, 56, 56, 37, 37, 37, 37, 37, 37, 37, 32, 32, 32, 32, 32, 32, 32, 24, 19, 18, 9, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:58:04,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-05 15:58:05,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:05,088 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:58:05,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:58:05,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1083468697, now seen corresponding path program 8 times [2025-02-05 15:58:05,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:58:05,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771569056] [2025-02-05 15:58:05,090 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:58:05,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:58:05,120 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 950 statements into 2 equivalence classes. [2025-02-05 15:58:05,223 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 950 of 950 statements. [2025-02-05 15:58:05,223 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:58:05,224 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 26852 backedges. 1677 proven. 2527 refuted. 0 times theorem prover too weak. 22648 trivial. 0 not checked. [2025-02-05 15:58:06,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:58:06,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771569056] [2025-02-05 15:58:06,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771569056] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:58:06,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446514014] [2025-02-05 15:58:06,604 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:58:06,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:06,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:58:06,607 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:58:06,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-05 15:58:06,791 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 950 statements into 2 equivalence classes. [2025-02-05 15:58:06,976 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 950 of 950 statements. [2025-02-05 15:58:06,976 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:58:06,976 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:06,983 INFO L256 TraceCheckSpWp]: Trace formula consists of 2129 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-05 15:58:06,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:58:07,166 INFO L134 CoverageAnalysis]: Checked inductivity of 26852 backedges. 405 proven. 2842 refuted. 0 times theorem prover too weak. 23605 trivial. 0 not checked. [2025-02-05 15:58:07,166 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:58:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 26852 backedges. 405 proven. 2886 refuted. 0 times theorem prover too weak. 23561 trivial. 0 not checked. [2025-02-05 15:58:11,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446514014] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:58:11,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:58:11,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14, 21] total 39 [2025-02-05 15:58:11,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124656274] [2025-02-05 15:58:11,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:58:11,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-02-05 15:58:11,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:58:11,547 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-02-05 15:58:11,547 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1322, Unknown=0, NotChecked=0, Total=1482 [2025-02-05 15:58:11,547 INFO L87 Difference]: Start difference. First operand 149 states and 276 transitions. Second operand has 39 states, 37 states have (on average 3.27027027027027) internal successors, (121), 39 states have internal predecessors, (121), 32 states have call successors, (38), 1 states have call predecessors, (38), 20 states have return successors, (52), 22 states have call predecessors, (52), 32 states have call successors, (52) [2025-02-05 15:58:13,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:58:13,003 INFO L93 Difference]: Finished difference Result 421 states and 1008 transitions. [2025-02-05 15:58:13,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2025-02-05 15:58:13,004 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 3.27027027027027) internal successors, (121), 39 states have internal predecessors, (121), 32 states have call successors, (38), 1 states have call predecessors, (38), 20 states have return successors, (52), 22 states have call predecessors, (52), 32 states have call successors, (52) Word has length 950 [2025-02-05 15:58:13,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:58:13,008 INFO L225 Difference]: With dead ends: 421 [2025-02-05 15:58:13,008 INFO L226 Difference]: Without dead ends: 270 [2025-02-05 15:58:13,013 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1975 GetRequests, 1879 SyntacticMatches, 9 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2224 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1008, Invalid=6824, Unknown=0, NotChecked=0, Total=7832 [2025-02-05 15:58:13,013 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 169 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 1748 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 1945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-02-05 15:58:13,014 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 867 Invalid, 1945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1748 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-02-05 15:58:13,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2025-02-05 15:58:13,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 230. [2025-02-05 15:58:13,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 158 states have (on average 1.0949367088607596) internal successors, (173), 156 states have internal predecessors, (173), 46 states have call successors, (46), 29 states have call predecessors, (46), 25 states have return successors, (135), 44 states have call predecessors, (135), 46 states have call successors, (135) [2025-02-05 15:58:13,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 354 transitions. [2025-02-05 15:58:13,038 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 354 transitions. Word has length 950 [2025-02-05 15:58:13,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:58:13,039 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 354 transitions. [2025-02-05 15:58:13,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 3.27027027027027) internal successors, (121), 39 states have internal predecessors, (121), 32 states have call successors, (38), 1 states have call predecessors, (38), 20 states have return successors, (52), 22 states have call predecessors, (52), 32 states have call successors, (52) [2025-02-05 15:58:13,039 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 354 transitions. [2025-02-05 15:58:13,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1219 [2025-02-05 15:58:13,049 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:58:13,050 INFO L218 NwaCegarLoop]: trace histogram [106, 106, 73, 73, 72, 68, 53, 53, 53, 53, 53, 53, 53, 36, 36, 36, 36, 36, 36, 36, 36, 34, 15, 5, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:58:13,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-05 15:58:13,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-05 15:58:13,250 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:58:13,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:58:13,251 INFO L85 PathProgramCache]: Analyzing trace with hash -346948851, now seen corresponding path program 9 times [2025-02-05 15:58:13,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:58:13,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839579218] [2025-02-05 15:58:13,251 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:58:13,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:58:13,296 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1218 statements into 67 equivalence classes. [2025-02-05 15:58:13,301 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 64 of 1218 statements. [2025-02-05 15:58:13,301 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 15:58:13,301 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 45638 backedges. 2269 proven. 15 refuted. 0 times theorem prover too weak. 43354 trivial. 0 not checked. [2025-02-05 15:58:13,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:58:13,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839579218] [2025-02-05 15:58:13,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839579218] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:58:13,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937808620] [2025-02-05 15:58:13,396 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:58:13,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:13,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:58:13,398 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:58:13,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-05 15:58:13,648 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1218 statements into 67 equivalence classes. [2025-02-05 15:58:13,664 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 64 of 1218 statements. [2025-02-05 15:58:13,664 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 15:58:13,664 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:13,666 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-05 15:58:13,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:58:13,762 INFO L134 CoverageAnalysis]: Checked inductivity of 45638 backedges. 2641 proven. 21 refuted. 0 times theorem prover too weak. 42976 trivial. 0 not checked. [2025-02-05 15:58:13,763 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:58:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 45638 backedges. 2641 proven. 21 refuted. 0 times theorem prover too weak. 42976 trivial. 0 not checked. [2025-02-05 15:58:16,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937808620] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:58:16,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:58:16,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2025-02-05 15:58:16,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215142675] [2025-02-05 15:58:16,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:58:16,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-05 15:58:16,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:58:16,582 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-05 15:58:16,582 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2025-02-05 15:58:16,582 INFO L87 Difference]: Start difference. First operand 230 states and 354 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 9 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2025-02-05 15:58:16,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:58:16,790 INFO L93 Difference]: Finished difference Result 466 states and 812 transitions. [2025-02-05 15:58:16,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-05 15:58:16,791 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 9 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 1218 [2025-02-05 15:58:16,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:58:16,793 INFO L225 Difference]: With dead ends: 466 [2025-02-05 15:58:16,793 INFO L226 Difference]: Without dead ends: 238 [2025-02-05 15:58:16,795 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2454 GetRequests, 2424 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2025-02-05 15:58:16,796 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:58:16,796 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 165 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:58:16,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2025-02-05 15:58:16,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 212. [2025-02-05 15:58:16,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 147 states have (on average 1.0952380952380953) internal successors, (161), 143 states have internal predecessors, (161), 41 states have call successors, (41), 28 states have call predecessors, (41), 23 states have return successors, (109), 40 states have call predecessors, (109), 41 states have call successors, (109) [2025-02-05 15:58:16,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 311 transitions. [2025-02-05 15:58:16,815 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 311 transitions. Word has length 1218 [2025-02-05 15:58:16,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:58:16,815 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 311 transitions. [2025-02-05 15:58:16,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 9 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2025-02-05 15:58:16,815 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 311 transitions. [2025-02-05 15:58:16,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1196 [2025-02-05 15:58:16,825 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:58:16,825 INFO L218 NwaCegarLoop]: trace histogram [94, 94, 81, 81, 71, 70, 47, 47, 47, 47, 47, 47, 47, 40, 40, 40, 40, 40, 40, 40, 31, 23, 23, 11, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:58:16,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-02-05 15:58:17,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-05 15:58:17,026 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:58:17,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:58:17,026 INFO L85 PathProgramCache]: Analyzing trace with hash 265815158, now seen corresponding path program 10 times [2025-02-05 15:58:17,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:58:17,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386984337] [2025-02-05 15:58:17,026 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:58:17,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:58:17,044 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1195 statements into 2 equivalence classes. [2025-02-05 15:58:17,162 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 1017 of 1195 statements. [2025-02-05 15:58:17,162 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:58:17,162 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 42788 backedges. 736 proven. 3250 refuted. 0 times theorem prover too weak. 38802 trivial. 0 not checked. [2025-02-05 15:58:17,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:58:17,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386984337] [2025-02-05 15:58:17,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386984337] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:58:17,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987312557] [2025-02-05 15:58:17,951 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:58:17,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:17,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:58:17,953 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:58:17,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-05 15:58:18,158 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1195 statements into 2 equivalence classes. [2025-02-05 15:58:18,325 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 1017 of 1195 statements. [2025-02-05 15:58:18,325 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:58:18,325 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:18,330 INFO L256 TraceCheckSpWp]: Trace formula consists of 2124 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 15:58:18,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:58:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 42788 backedges. 6924 proven. 68 refuted. 0 times theorem prover too weak. 35796 trivial. 0 not checked. [2025-02-05 15:58:18,425 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:58:22,018 INFO L134 CoverageAnalysis]: Checked inductivity of 42788 backedges. 739 proven. 3582 refuted. 0 times theorem prover too weak. 38467 trivial. 0 not checked. [2025-02-05 15:58:22,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987312557] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:58:22,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:58:22,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15] total 22 [2025-02-05 15:58:22,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373519468] [2025-02-05 15:58:22,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:58:22,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-05 15:58:22,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:58:22,020 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-05 15:58:22,020 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2025-02-05 15:58:22,020 INFO L87 Difference]: Start difference. First operand 212 states and 311 transitions. Second operand has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 15 states have call successors, (25), 2 states have call predecessors, (25), 8 states have return successors, (29), 8 states have call predecessors, (29), 15 states have call successors, (29) [2025-02-05 15:58:22,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:58:22,242 INFO L93 Difference]: Finished difference Result 430 states and 679 transitions. [2025-02-05 15:58:22,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-05 15:58:22,243 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 15 states have call successors, (25), 2 states have call predecessors, (25), 8 states have return successors, (29), 8 states have call predecessors, (29), 15 states have call successors, (29) Word has length 1195 [2025-02-05 15:58:22,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:58:22,246 INFO L225 Difference]: With dead ends: 430 [2025-02-05 15:58:22,246 INFO L226 Difference]: Without dead ends: 225 [2025-02-05 15:58:22,248 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2414 GetRequests, 2376 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2025-02-05 15:58:22,248 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 42 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:58:22,248 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 212 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:58:22,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2025-02-05 15:58:22,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 213. [2025-02-05 15:58:22,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 148 states have (on average 1.087837837837838) internal successors, (161), 144 states have internal predecessors, (161), 41 states have call successors, (41), 28 states have call predecessors, (41), 23 states have return successors, (106), 40 states have call predecessors, (106), 41 states have call successors, (106) [2025-02-05 15:58:22,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 308 transitions. [2025-02-05 15:58:22,266 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 308 transitions. Word has length 1195 [2025-02-05 15:58:22,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:58:22,267 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 308 transitions. [2025-02-05 15:58:22,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 15 states have call successors, (25), 2 states have call predecessors, (25), 8 states have return successors, (29), 8 states have call predecessors, (29), 15 states have call successors, (29) [2025-02-05 15:58:22,267 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 308 transitions. [2025-02-05 15:58:22,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1374 [2025-02-05 15:58:22,278 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:58:22,279 INFO L218 NwaCegarLoop]: trace histogram [109, 109, 92, 92, 84, 79, 54, 54, 54, 54, 54, 54, 54, 46, 46, 46, 46, 46, 46, 46, 38, 25, 25, 13, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:58:22,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-02-05 15:58:22,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-05 15:58:22,480 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:58:22,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:58:22,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1984989296, now seen corresponding path program 11 times [2025-02-05 15:58:22,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:58:22,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890082985] [2025-02-05 15:58:22,481 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:58:22,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:58:22,511 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1373 statements into 86 equivalence classes. [2025-02-05 15:58:22,538 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) and asserted 332 of 1373 statements. [2025-02-05 15:58:22,538 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2025-02-05 15:58:22,538 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:22,978 INFO L134 CoverageAnalysis]: Checked inductivity of 56719 backedges. 1835 proven. 4420 refuted. 0 times theorem prover too weak. 50464 trivial. 0 not checked. [2025-02-05 15:58:22,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:58:22,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890082985] [2025-02-05 15:58:22,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890082985] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:58:22,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931509317] [2025-02-05 15:58:22,979 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:58:22,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:22,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:58:22,981 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:58:22,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-05 15:58:23,248 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1373 statements into 86 equivalence classes. [2025-02-05 15:58:23,329 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) and asserted 332 of 1373 statements. [2025-02-05 15:58:23,329 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2025-02-05 15:58:23,329 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:23,332 INFO L256 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-05 15:58:23,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:58:23,458 INFO L134 CoverageAnalysis]: Checked inductivity of 56719 backedges. 25814 proven. 392 refuted. 0 times theorem prover too weak. 30513 trivial. 0 not checked. [2025-02-05 15:58:23,459 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:58:28,631 INFO L134 CoverageAnalysis]: Checked inductivity of 56719 backedges. 1814 proven. 4367 refuted. 0 times theorem prover too weak. 50538 trivial. 0 not checked. [2025-02-05 15:58:28,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931509317] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:58:28,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:58:28,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 21] total 30 [2025-02-05 15:58:28,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527469838] [2025-02-05 15:58:28,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:58:28,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-05 15:58:28,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:58:28,633 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-05 15:58:28,634 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2025-02-05 15:58:28,634 INFO L87 Difference]: Start difference. First operand 213 states and 308 transitions. Second operand has 30 states, 30 states have (on average 3.7666666666666666) internal successors, (113), 30 states have internal predecessors, (113), 22 states have call successors, (35), 2 states have call predecessors, (35), 13 states have return successors, (44), 15 states have call predecessors, (44), 22 states have call successors, (44) [2025-02-05 15:58:29,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:58:29,271 INFO L93 Difference]: Finished difference Result 455 states and 714 transitions. [2025-02-05 15:58:29,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-02-05 15:58:29,271 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.7666666666666666) internal successors, (113), 30 states have internal predecessors, (113), 22 states have call successors, (35), 2 states have call predecessors, (35), 13 states have return successors, (44), 15 states have call predecessors, (44), 22 states have call successors, (44) Word has length 1373 [2025-02-05 15:58:29,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:58:29,274 INFO L225 Difference]: With dead ends: 455 [2025-02-05 15:58:29,274 INFO L226 Difference]: Without dead ends: 234 [2025-02-05 15:58:29,276 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2791 GetRequests, 2729 SyntacticMatches, 10 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=463, Invalid=2399, Unknown=0, NotChecked=0, Total=2862 [2025-02-05 15:58:29,278 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 83 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 15:58:29,278 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 489 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 15:58:29,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2025-02-05 15:58:29,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 207. [2025-02-05 15:58:29,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 146 states have (on average 1.0890410958904109) internal successors, (159), 141 states have internal predecessors, (159), 40 states have call successors, (40), 31 states have call predecessors, (40), 20 states have return successors, (95), 34 states have call predecessors, (95), 40 states have call successors, (95) [2025-02-05 15:58:29,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 294 transitions. [2025-02-05 15:58:29,297 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 294 transitions. Word has length 1373 [2025-02-05 15:58:29,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:58:29,297 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 294 transitions. [2025-02-05 15:58:29,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.7666666666666666) internal successors, (113), 30 states have internal predecessors, (113), 22 states have call successors, (35), 2 states have call predecessors, (35), 13 states have return successors, (44), 15 states have call predecessors, (44), 22 states have call successors, (44) [2025-02-05 15:58:29,297 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 294 transitions. [2025-02-05 15:58:29,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1251 [2025-02-05 15:58:29,308 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:58:29,308 INFO L218 NwaCegarLoop]: trace histogram [93, 93, 90, 90, 74, 74, 46, 46, 46, 46, 46, 46, 46, 45, 45, 45, 45, 45, 45, 45, 29, 28, 19, 16, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:58:29,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-05 15:58:29,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:29,509 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:58:29,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:58:29,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1364492379, now seen corresponding path program 12 times [2025-02-05 15:58:29,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:58:29,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718785456] [2025-02-05 15:58:29,510 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 15:58:29,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:58:29,557 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1250 statements into 81 equivalence classes. [2025-02-05 15:58:29,615 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) and asserted 390 of 1250 statements. [2025-02-05 15:58:29,615 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2025-02-05 15:58:29,615 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 46634 backedges. 907 proven. 3466 refuted. 0 times theorem prover too weak. 42261 trivial. 0 not checked. [2025-02-05 15:58:29,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:58:29,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718785456] [2025-02-05 15:58:29,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718785456] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:58:29,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109874240] [2025-02-05 15:58:29,993 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 15:58:29,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:29,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:58:29,995 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:58:29,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-05 15:58:30,279 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1250 statements into 81 equivalence classes. [2025-02-05 15:58:30,367 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) and asserted 390 of 1250 statements. [2025-02-05 15:58:30,367 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2025-02-05 15:58:30,367 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:30,371 INFO L256 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-05 15:58:30,379 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:58:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 46634 backedges. 907 proven. 3466 refuted. 0 times theorem prover too weak. 42261 trivial. 0 not checked. [2025-02-05 15:58:30,478 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:58:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 46634 backedges. 911 proven. 3506 refuted. 0 times theorem prover too weak. 42217 trivial. 0 not checked. [2025-02-05 15:58:35,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109874240] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:58:35,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:58:35,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 21] total 24 [2025-02-05 15:58:35,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910117025] [2025-02-05 15:58:35,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:58:35,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-05 15:58:35,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:58:35,356 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-05 15:58:35,357 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2025-02-05 15:58:35,357 INFO L87 Difference]: Start difference. First operand 207 states and 294 transitions. Second operand has 24 states, 22 states have (on average 3.727272727272727) internal successors, (82), 24 states have internal predecessors, (82), 20 states have call successors, (25), 1 states have call predecessors, (25), 10 states have return successors, (31), 12 states have call predecessors, (31), 20 states have call successors, (31) [2025-02-05 15:58:35,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:58:35,554 INFO L93 Difference]: Finished difference Result 234 states and 355 transitions. [2025-02-05 15:58:35,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-05 15:58:35,554 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.727272727272727) internal successors, (82), 24 states have internal predecessors, (82), 20 states have call successors, (25), 1 states have call predecessors, (25), 10 states have return successors, (31), 12 states have call predecessors, (31), 20 states have call successors, (31) Word has length 1250 [2025-02-05 15:58:35,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:58:35,559 INFO L225 Difference]: With dead ends: 234 [2025-02-05 15:58:35,559 INFO L226 Difference]: Without dead ends: 230 [2025-02-05 15:58:35,559 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2527 GetRequests, 2488 SyntacticMatches, 9 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2025-02-05 15:58:35,560 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 69 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:58:35,560 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 205 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:58:35,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2025-02-05 15:58:35,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 225. [2025-02-05 15:58:35,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 157 states have (on average 1.0828025477707006) internal successors, (170), 152 states have internal predecessors, (170), 43 states have call successors, (43), 31 states have call predecessors, (43), 24 states have return successors, (127), 41 states have call predecessors, (127), 43 states have call successors, (127) [2025-02-05 15:58:35,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 340 transitions. [2025-02-05 15:58:35,580 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 340 transitions. Word has length 1250 [2025-02-05 15:58:35,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:58:35,581 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 340 transitions. [2025-02-05 15:58:35,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.727272727272727) internal successors, (82), 24 states have internal predecessors, (82), 20 states have call successors, (25), 1 states have call predecessors, (25), 10 states have return successors, (31), 12 states have call predecessors, (31), 20 states have call successors, (31) [2025-02-05 15:58:35,581 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 340 transitions. [2025-02-05 15:58:35,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1551 [2025-02-05 15:58:35,595 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:58:35,596 INFO L218 NwaCegarLoop]: trace histogram [117, 117, 110, 110, 94, 90, 58, 58, 58, 58, 58, 58, 58, 55, 55, 55, 55, 55, 55, 55, 39, 32, 23, 20, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:58:35,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-02-05 15:58:35,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:35,796 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:58:35,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:58:35,797 INFO L85 PathProgramCache]: Analyzing trace with hash -623542233, now seen corresponding path program 13 times [2025-02-05 15:58:35,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:58:35,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367848971] [2025-02-05 15:58:35,797 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 15:58:35,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:58:35,819 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1550 statements into 1 equivalence classes. [2025-02-05 15:58:36,010 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1550 of 1550 statements. [2025-02-05 15:58:36,010 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:58:36,010 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:37,895 INFO L134 CoverageAnalysis]: Checked inductivity of 72052 backedges. 762 proven. 5315 refuted. 0 times theorem prover too weak. 65975 trivial. 0 not checked. [2025-02-05 15:58:37,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:58:37,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367848971] [2025-02-05 15:58:37,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367848971] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:58:37,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331156999] [2025-02-05 15:58:37,895 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 15:58:37,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:37,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:58:37,897 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:58:37,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-05 15:58:38,204 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1550 statements into 1 equivalence classes. [2025-02-05 15:58:38,519 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1550 of 1550 statements. [2025-02-05 15:58:38,519 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:58:38,519 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:38,528 INFO L256 TraceCheckSpWp]: Trace formula consists of 3461 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-05 15:58:38,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:58:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 72052 backedges. 762 proven. 5315 refuted. 0 times theorem prover too weak. 65975 trivial. 0 not checked. [2025-02-05 15:58:38,631 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:58:45,041 INFO L134 CoverageAnalysis]: Checked inductivity of 72052 backedges. 762 proven. 5371 refuted. 0 times theorem prover too weak. 65919 trivial. 0 not checked. [2025-02-05 15:58:45,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331156999] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:58:45,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:58:45,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 23] total 26 [2025-02-05 15:58:45,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454795052] [2025-02-05 15:58:45,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:58:45,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-05 15:58:45,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:58:45,044 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-05 15:58:45,044 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2025-02-05 15:58:45,044 INFO L87 Difference]: Start difference. First operand 225 states and 340 transitions. Second operand has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 23 states have call successors, (26), 1 states have call predecessors, (26), 11 states have return successors, (33), 11 states have call predecessors, (33), 23 states have call successors, (33) [2025-02-05 15:58:45,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:58:45,257 INFO L93 Difference]: Finished difference Result 242 states and 383 transitions. [2025-02-05 15:58:45,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-05 15:58:45,258 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 23 states have call successors, (26), 1 states have call predecessors, (26), 11 states have return successors, (33), 11 states have call predecessors, (33), 23 states have call successors, (33) Word has length 1550 [2025-02-05 15:58:45,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:58:45,262 INFO L225 Difference]: With dead ends: 242 [2025-02-05 15:58:45,262 INFO L226 Difference]: Without dead ends: 238 [2025-02-05 15:58:45,262 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3130 GetRequests, 3087 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2025-02-05 15:58:45,263 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 63 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:58:45,263 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 229 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:58:45,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2025-02-05 15:58:45,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 217. [2025-02-05 15:58:45,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 152 states have (on average 1.0855263157894737) internal successors, (165), 147 states have internal predecessors, (165), 42 states have call successors, (42), 31 states have call predecessors, (42), 22 states have return successors, (112), 38 states have call predecessors, (112), 42 states have call successors, (112) [2025-02-05 15:58:45,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 319 transitions. [2025-02-05 15:58:45,282 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 319 transitions. Word has length 1550 [2025-02-05 15:58:45,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:58:45,283 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 319 transitions. [2025-02-05 15:58:45,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 23 states have call successors, (26), 1 states have call predecessors, (26), 11 states have return successors, (33), 11 states have call predecessors, (33), 23 states have call successors, (33) [2025-02-05 15:58:45,284 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 319 transitions. [2025-02-05 15:58:45,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2068 [2025-02-05 15:58:45,306 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:58:45,307 INFO L218 NwaCegarLoop]: trace histogram [153, 153, 150, 150, 123, 122, 76, 76, 76, 76, 76, 76, 76, 75, 75, 75, 75, 75, 75, 75, 48, 46, 30, 28, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:58:45,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-02-05 15:58:45,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:45,508 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:58:45,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:58:45,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1837769051, now seen corresponding path program 14 times [2025-02-05 15:58:45,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:58:45,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662001966] [2025-02-05 15:58:45,509 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:58:45,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:58:45,538 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 2067 statements into 2 equivalence classes. [2025-02-05 15:58:45,856 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 2067 of 2067 statements. [2025-02-05 15:58:45,856 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:58:45,856 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 128596 backedges. 2836 proven. 9685 refuted. 0 times theorem prover too weak. 116075 trivial. 0 not checked. [2025-02-05 15:58:49,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:58:49,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662001966] [2025-02-05 15:58:49,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662001966] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:58:49,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173732213] [2025-02-05 15:58:49,751 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:58:49,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:49,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:58:49,753 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:58:49,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-05 15:58:50,120 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 2067 statements into 2 equivalence classes. [2025-02-05 15:58:50,486 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 2067 of 2067 statements. [2025-02-05 15:58:50,487 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:58:50,487 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:50,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 4609 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-05 15:58:50,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:58:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 128596 backedges. 977 proven. 8061 refuted. 0 times theorem prover too weak. 119558 trivial. 0 not checked. [2025-02-05 15:58:50,692 INFO L312 TraceCheckSpWp]: Computing backward predicates...