./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_7-1.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_7-1.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 17c70baee0bc6a4a26b6403fb6f46125ad9d7f8a7127109634f2327c61aaf5cb --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 15:58:31,558 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 15:58:31,598 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 15:58:31,601 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 15:58:31,602 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 15:58:31,615 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 15:58:31,615 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 15:58:31,615 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 15:58:31,615 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 15:58:31,615 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 15:58:31,615 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 15:58:31,615 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 15:58:31,616 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 15:58:31,616 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 15:58:31,616 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 15:58:31,616 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 15:58:31,616 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 15:58:31,616 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 15:58:31,616 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 15:58:31,616 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 15:58:31,616 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 15:58:31,616 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 15:58:31,616 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 15:58:31,616 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 15:58:31,616 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 15:58:31,616 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 15:58:31,616 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 15:58:31,616 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 15:58:31,618 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 15:58:31,618 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 15:58:31,618 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 15:58:31,618 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 15:58:31,618 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:58:31,618 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 15:58:31,618 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 15:58:31,618 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 15:58:31,618 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 15:58:31,618 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 15:58:31,619 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 15:58:31,619 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 15:58:31,619 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 15:58:31,619 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 15:58:31,619 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 15:58:31,619 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 -> 17c70baee0bc6a4a26b6403fb6f46125ad9d7f8a7127109634f2327c61aaf5cb [2025-02-05 15:58:31,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 15:58:31,838 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 15:58:31,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 15:58:31,840 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 15:58:31,840 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 15:58:31,841 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_7-1.c [2025-02-05 15:58:32,997 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c766d005e/a38f6aa53834401aa433f5436e898ce0/FLAGb74fcfaf8 [2025-02-05 15:58:33,197 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 15:58:33,206 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_7-1.c [2025-02-05 15:58:33,215 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c766d005e/a38f6aa53834401aa433f5436e898ce0/FLAGb74fcfaf8 [2025-02-05 15:58:33,255 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c766d005e/a38f6aa53834401aa433f5436e898ce0 [2025-02-05 15:58:33,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 15:58:33,265 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 15:58:33,270 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 15:58:33,270 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 15:58:33,278 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 15:58:33,278 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:58:33" (1/1) ... [2025-02-05 15:58:33,279 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d4306cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:58:33, skipping insertion in model container [2025-02-05 15:58:33,279 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:58:33" (1/1) ... [2025-02-05 15:58:33,290 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 15:58:33,386 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_7-1.c[741,754] [2025-02-05 15:58:33,388 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:58:33,395 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 15:58:33,405 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_7-1.c[741,754] [2025-02-05 15:58:33,406 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:58:33,416 INFO L204 MainTranslator]: Completed translation [2025-02-05 15:58:33,417 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:58:33 WrapperNode [2025-02-05 15:58:33,417 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 15:58:33,418 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 15:58:33,418 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 15:58:33,418 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 15:58:33,423 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:58:33" (1/1) ... [2025-02-05 15:58:33,427 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:58:33" (1/1) ... [2025-02-05 15:58:33,436 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2025-02-05 15:58:33,437 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 15:58:33,437 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 15:58:33,438 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 15:58:33,438 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 15:58:33,442 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:58:33" (1/1) ... [2025-02-05 15:58:33,442 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:58:33" (1/1) ... [2025-02-05 15:58:33,443 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:58:33" (1/1) ... [2025-02-05 15:58:33,450 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 15:58:33,450 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:58:33" (1/1) ... [2025-02-05 15:58:33,451 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:58:33" (1/1) ... [2025-02-05 15:58:33,453 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:58:33" (1/1) ... [2025-02-05 15:58:33,455 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:58:33" (1/1) ... [2025-02-05 15:58:33,455 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:58:33" (1/1) ... [2025-02-05 15:58:33,456 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:58:33" (1/1) ... [2025-02-05 15:58:33,456 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 15:58:33,457 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 15:58:33,458 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 15:58:33,458 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 15:58:33,458 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:58:33" (1/1) ... [2025-02-05 15:58:33,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:58:33,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:58:33,481 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 15:58:33,490 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 15:58:33,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 15:58:33,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 15:58:33,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 15:58:33,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 15:58:33,508 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2025-02-05 15:58:33,508 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2025-02-05 15:58:33,545 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 15:58:33,546 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 15:58:33,610 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L13: havoc #t~ret4;havoc #t~ret5; [2025-02-05 15:58:33,618 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-02-05 15:58:33,618 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 15:58:33,623 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 15:58:33,623 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 15:58:33,624 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:58:33 BoogieIcfgContainer [2025-02-05 15:58:33,624 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 15:58:33,625 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 15:58:33,625 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 15:58:33,628 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 15:58:33,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 03:58:33" (1/3) ... [2025-02-05 15:58:33,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7f1a9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:58:33, skipping insertion in model container [2025-02-05 15:58:33,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:58:33" (2/3) ... [2025-02-05 15:58:33,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7f1a9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:58:33, skipping insertion in model container [2025-02-05 15:58:33,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:58:33" (3/3) ... [2025-02-05 15:58:33,630 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_7-1.c [2025-02-05 15:58:33,646 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 15:58:33,647 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_7-1.c that has 2 procedures, 20 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-02-05 15:58:33,679 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 15:58:33,697 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;@5a1e5a81, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 15:58:33,697 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 15:58:33,700 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 15:58:33,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-02-05 15:58:33,710 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:58:33,711 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:58:33,711 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:58:33,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:58:33,719 INFO L85 PathProgramCache]: Analyzing trace with hash 402921910, now seen corresponding path program 1 times [2025-02-05 15:58:33,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:58:33,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463513478] [2025-02-05 15:58:33,728 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:58:33,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:58:33,821 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-05 15:58:33,844 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-05 15:58:33,851 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:58:33,851 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:33,975 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 15:58:33,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:58:33,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463513478] [2025-02-05 15:58:33,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463513478] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:58:33,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:58:33,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:58:33,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940582415] [2025-02-05 15:58:33,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:58:33,989 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:58:33,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:58:34,011 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:58:34,011 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:58:34,012 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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 15:58:34,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:58:34,110 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2025-02-05 15:58:34,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:58:34,112 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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 15:58:34,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:58:34,121 INFO L225 Difference]: With dead ends: 32 [2025-02-05 15:58:34,124 INFO L226 Difference]: Without dead ends: 20 [2025-02-05 15:58:34,128 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 15:58:34,133 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:58:34,134 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 51 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:58:34,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-02-05 15:58:34,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2025-02-05 15:58:34,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-02-05 15:58:34,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2025-02-05 15:58:34,189 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2025-02-05 15:58:34,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:58:34,191 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2025-02-05 15:58:34,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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 15:58:34,191 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2025-02-05 15:58:34,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-02-05 15:58:34,192 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:58:34,192 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:58:34,196 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 15:58:34,196 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:58:34,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:58:34,196 INFO L85 PathProgramCache]: Analyzing trace with hash -2143228819, now seen corresponding path program 1 times [2025-02-05 15:58:34,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:58:34,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973741102] [2025-02-05 15:58:34,196 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:58:34,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:58:34,206 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-05 15:58:34,219 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-05 15:58:34,219 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:58:34,220 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:34,310 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 15:58:34,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:58:34,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973741102] [2025-02-05 15:58:34,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973741102] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:58:34,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:58:34,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:58:34,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939980879] [2025-02-05 15:58:34,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:58:34,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:58:34,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:58:34,318 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:58:34,318 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:58:34,318 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 15:58:34,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:58:34,380 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2025-02-05 15:58:34,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:58:34,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 15:58:34,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:58:34,382 INFO L225 Difference]: With dead ends: 24 [2025-02-05 15:58:34,382 INFO L226 Difference]: Without dead ends: 20 [2025-02-05 15:58:34,385 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 15:58:34,386 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:58:34,387 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 34 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:58:34,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-02-05 15:58:34,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2025-02-05 15:58:34,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-02-05 15:58:34,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2025-02-05 15:58:34,396 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2025-02-05 15:58:34,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:58:34,399 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2025-02-05 15:58:34,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 15:58:34,400 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2025-02-05 15:58:34,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-02-05 15:58:34,400 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:58:34,400 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:58:34,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-05 15:58:34,400 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:58:34,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:58:34,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1857137997, now seen corresponding path program 1 times [2025-02-05 15:58:34,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:58:34,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971024015] [2025-02-05 15:58:34,401 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:58:34,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:58:34,409 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-05 15:58:34,422 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-05 15:58:34,422 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:58:34,422 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:34,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 15:58:34,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:58:34,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971024015] [2025-02-05 15:58:34,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971024015] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:58:34,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073253478] [2025-02-05 15:58:34,509 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:58:34,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:34,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:58:34,512 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 15:58:34,515 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 15:58:34,538 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-05 15:58:34,548 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-05 15:58:34,548 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:58:34,548 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:34,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-05 15:58:34,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:58:34,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 15:58:34,614 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:58:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 15:58:34,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073253478] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:58:34,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:58:34,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 11 [2025-02-05 15:58:34,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289986759] [2025-02-05 15:58:34,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:58:34,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-05 15:58:34,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:58:34,761 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-05 15:58:34,761 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2025-02-05 15:58:34,762 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 11 states, 8 states have (on average 3.5) internal successors, (28), 11 states have internal predecessors, (28), 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 15:58:34,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:58:34,820 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2025-02-05 15:58:34,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-05 15:58:34,821 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 3.5) internal successors, (28), 11 states have internal predecessors, (28), 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 15:58:34,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:58:34,821 INFO L225 Difference]: With dead ends: 35 [2025-02-05 15:58:34,821 INFO L226 Difference]: Without dead ends: 20 [2025-02-05 15:58:34,822 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2025-02-05 15:58:34,822 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:58:34,822 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 60 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:58:34,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-02-05 15:58:34,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-02-05 15:58:34,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 15 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2025-02-05 15:58:34,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2025-02-05 15:58:34,826 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 23 [2025-02-05 15:58:34,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:58:34,826 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2025-02-05 15:58:34,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 3.5) internal successors, (28), 11 states have internal predecessors, (28), 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 15:58:34,826 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2025-02-05 15:58:34,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-02-05 15:58:34,827 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:58:34,827 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:58:34,833 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 15:58:35,031 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 15:58:35,031 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:58:35,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:58:35,032 INFO L85 PathProgramCache]: Analyzing trace with hash -318077138, now seen corresponding path program 1 times [2025-02-05 15:58:35,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:58:35,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439569458] [2025-02-05 15:58:35,032 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:58:35,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:58:35,036 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-05 15:58:35,042 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-05 15:58:35,042 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:58:35,042 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:35,106 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 15:58:35,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:58:35,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439569458] [2025-02-05 15:58:35,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439569458] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:58:35,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256198298] [2025-02-05 15:58:35,107 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:58:35,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:35,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:58:35,109 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 15:58:35,110 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 15:58:35,132 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-05 15:58:35,139 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-05 15:58:35,139 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:58:35,139 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:35,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-05 15:58:35,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:58:35,166 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 15:58:35,166 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:58:35,285 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 15:58:35,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256198298] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:58:35,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:58:35,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 9 [2025-02-05 15:58:35,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372394303] [2025-02-05 15:58:35,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:58:35,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-05 15:58:35,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:58:35,286 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-05 15:58:35,286 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-02-05 15:58:35,287 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 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 15:58:35,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:58:35,330 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2025-02-05 15:58:35,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 15:58:35,331 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 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 15:58:35,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:58:35,331 INFO L225 Difference]: With dead ends: 29 [2025-02-05 15:58:35,331 INFO L226 Difference]: Without dead ends: 25 [2025-02-05 15:58:35,332 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-02-05 15:58:35,332 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:58:35,332 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:58:35,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-02-05 15:58:35,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2025-02-05 15:58:35,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2025-02-05 15:58:35,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2025-02-05 15:58:35,337 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 24 [2025-02-05 15:58:35,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:58:35,337 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2025-02-05 15:58:35,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 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 15:58:35,337 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2025-02-05 15:58:35,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-05 15:58:35,338 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:58:35,338 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:58:35,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-05 15:58:35,540 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 15:58:35,540 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:58:35,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:58:35,540 INFO L85 PathProgramCache]: Analyzing trace with hash -896080901, now seen corresponding path program 2 times [2025-02-05 15:58:35,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:58:35,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646096727] [2025-02-05 15:58:35,541 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:58:35,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:58:35,550 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-02-05 15:58:35,563 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 15:58:35,564 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:58:35,564 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:35,708 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-05 15:58:35,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:58:35,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646096727] [2025-02-05 15:58:35,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646096727] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:58:35,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929694733] [2025-02-05 15:58:35,708 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:58:35,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:35,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:58:35,712 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 15:58:35,715 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 15:58:35,737 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-02-05 15:58:35,748 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 15:58:35,748 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:58:35,749 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:35,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-05 15:58:35,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:58:35,959 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-02-05 15:58:35,959 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:58:36,484 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-02-05 15:58:36,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929694733] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:58:36,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:58:36,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9] total 18 [2025-02-05 15:58:36,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325176156] [2025-02-05 15:58:36,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:58:36,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-05 15:58:36,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:58:36,485 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-05 15:58:36,485 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2025-02-05 15:58:36,486 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 18 states, 16 states have (on average 2.8125) internal successors, (45), 18 states have internal predecessors, (45), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) [2025-02-05 15:58:36,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:58:36,662 INFO L93 Difference]: Finished difference Result 60 states and 93 transitions. [2025-02-05 15:58:36,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-05 15:58:36,662 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.8125) internal successors, (45), 18 states have internal predecessors, (45), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) Word has length 37 [2025-02-05 15:58:36,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:58:36,663 INFO L225 Difference]: With dead ends: 60 [2025-02-05 15:58:36,664 INFO L226 Difference]: Without dead ends: 38 [2025-02-05 15:58:36,665 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2025-02-05 15:58:36,665 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 52 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:58:36,665 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 95 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:58:36,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-02-05 15:58:36,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2025-02-05 15:58:36,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2025-02-05 15:58:36,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2025-02-05 15:58:36,674 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 37 [2025-02-05 15:58:36,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:58:36,674 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2025-02-05 15:58:36,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.8125) internal successors, (45), 18 states have internal predecessors, (45), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) [2025-02-05 15:58:36,674 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2025-02-05 15:58:36,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2025-02-05 15:58:36,676 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:58:36,676 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:58:36,682 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 15:58:36,876 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 15:58:36,877 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:58:36,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:58:36,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1467785241, now seen corresponding path program 3 times [2025-02-05 15:58:36,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:58:36,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910243301] [2025-02-05 15:58:36,878 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:58:36,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:58:36,884 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 93 statements into 12 equivalence classes. [2025-02-05 15:58:36,893 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 59 of 93 statements. [2025-02-05 15:58:36,894 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-02-05 15:58:36,894 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2025-02-05 15:58:36,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:58:36,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910243301] [2025-02-05 15:58:36,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910243301] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:58:36,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759567825] [2025-02-05 15:58:36,985 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:58:36,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:36,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:58:36,987 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 15:58:36,989 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 15:58:37,020 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 93 statements into 12 equivalence classes. [2025-02-05 15:58:37,036 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 59 of 93 statements. [2025-02-05 15:58:37,036 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-02-05 15:58:37,036 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:37,037 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-05 15:58:37,038 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:58:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2025-02-05 15:58:37,069 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:58:37,373 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 18 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2025-02-05 15:58:37,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759567825] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:58:37,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:58:37,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 11 [2025-02-05 15:58:37,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849217230] [2025-02-05 15:58:37,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:58:37,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-05 15:58:37,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:58:37,374 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-05 15:58:37,374 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-02-05 15:58:37,374 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2025-02-05 15:58:37,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:58:37,455 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2025-02-05 15:58:37,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 15:58:37,455 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 93 [2025-02-05 15:58:37,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:58:37,456 INFO L225 Difference]: With dead ends: 72 [2025-02-05 15:58:37,456 INFO L226 Difference]: Without dead ends: 40 [2025-02-05 15:58:37,457 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 180 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2025-02-05 15:58:37,457 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:58:37,457 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 84 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:58:37,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-02-05 15:58:37,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2025-02-05 15:58:37,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.103448275862069) internal successors, (32), 27 states have internal predecessors, (32), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2025-02-05 15:58:37,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2025-02-05 15:58:37,466 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 93 [2025-02-05 15:58:37,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:58:37,466 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2025-02-05 15:58:37,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2025-02-05 15:58:37,466 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2025-02-05 15:58:37,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2025-02-05 15:58:37,467 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:58:37,467 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:58:37,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-05 15:58:37,667 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 15:58:37,668 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:58:37,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:58:37,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1566632231, now seen corresponding path program 4 times [2025-02-05 15:58:37,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:58:37,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980246838] [2025-02-05 15:58:37,669 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:58:37,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:58:37,680 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 79 statements into 2 equivalence classes. [2025-02-05 15:58:37,689 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 66 of 79 statements. [2025-02-05 15:58:37,689 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:58:37,689 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:37,812 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 127 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2025-02-05 15:58:37,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:58:37,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980246838] [2025-02-05 15:58:37,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980246838] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:58:37,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156581624] [2025-02-05 15:58:37,812 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:58:37,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:37,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:58:37,814 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 15:58:37,816 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 15:58:37,838 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 79 statements into 2 equivalence classes. [2025-02-05 15:58:37,849 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 66 of 79 statements. [2025-02-05 15:58:37,849 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:58:37,849 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:37,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-05 15:58:37,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:58:37,905 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 127 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2025-02-05 15:58:37,906 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:58:38,308 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 142 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2025-02-05 15:58:38,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156581624] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:58:38,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:58:38,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 13 [2025-02-05 15:58:38,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604525607] [2025-02-05 15:58:38,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:58:38,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-05 15:58:38,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:58:38,309 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-05 15:58:38,309 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2025-02-05 15:58:38,310 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 13 states have internal predecessors, (40), 10 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (13), 5 states have call predecessors, (13), 10 states have call successors, (13) [2025-02-05 15:58:38,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:58:38,375 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2025-02-05 15:58:38,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-05 15:58:38,376 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 13 states have internal predecessors, (40), 10 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (13), 5 states have call predecessors, (13), 10 states have call successors, (13) Word has length 79 [2025-02-05 15:58:38,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:58:38,377 INFO L225 Difference]: With dead ends: 49 [2025-02-05 15:58:38,377 INFO L226 Difference]: Without dead ends: 45 [2025-02-05 15:58:38,377 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 152 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2025-02-05 15:58:38,378 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 42 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:58:38,378 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 65 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:58:38,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-02-05 15:58:38,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2025-02-05 15:58:38,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.09375) internal successors, (35), 30 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (16), 9 states have call predecessors, (16), 6 states have call successors, (16) [2025-02-05 15:58:38,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2025-02-05 15:58:38,384 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 79 [2025-02-05 15:58:38,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:58:38,385 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2025-02-05 15:58:38,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 13 states have internal predecessors, (40), 10 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (13), 5 states have call predecessors, (13), 10 states have call successors, (13) [2025-02-05 15:58:38,385 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2025-02-05 15:58:38,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2025-02-05 15:58:38,391 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:58:38,391 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 14, 8, 8, 8, 8, 8, 8, 8, 6, 3, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:58:38,400 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 15:58:38,591 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 15:58:38,592 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:58:38,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:58:38,593 INFO L85 PathProgramCache]: Analyzing trace with hash -2001272466, now seen corresponding path program 5 times [2025-02-05 15:58:38,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:58:38,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220357350] [2025-02-05 15:58:38,593 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:58:38,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:58:38,607 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 120 statements into 14 equivalence classes. [2025-02-05 15:58:38,614 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 61 of 120 statements. [2025-02-05 15:58:38,614 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-05 15:58:38,614 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:38,802 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 135 proven. 258 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2025-02-05 15:58:38,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:58:38,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220357350] [2025-02-05 15:58:38,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220357350] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:58:38,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041497705] [2025-02-05 15:58:38,803 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:58:38,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:38,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:58:38,805 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 15:58:38,806 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 15:58:38,837 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 120 statements into 14 equivalence classes. [2025-02-05 15:58:38,850 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 61 of 120 statements. [2025-02-05 15:58:38,850 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-05 15:58:38,850 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:38,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-05 15:58:38,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:58:38,963 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 422 proven. 118 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2025-02-05 15:58:38,963 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:58:39,807 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 133 proven. 274 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2025-02-05 15:58:39,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041497705] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:58:39,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:58:39,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 14] total 21 [2025-02-05 15:58:39,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632490585] [2025-02-05 15:58:39,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:58:39,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-05 15:58:39,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:58:39,809 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-05 15:58:39,810 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2025-02-05 15:58:39,810 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 13 states have call successors, (20), 2 states have call predecessors, (20), 8 states have return successors, (24), 9 states have call predecessors, (24), 13 states have call successors, (24) [2025-02-05 15:58:39,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:58:39,977 INFO L93 Difference]: Finished difference Result 91 states and 127 transitions. [2025-02-05 15:58:39,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-05 15:58:39,977 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 13 states have call successors, (20), 2 states have call predecessors, (20), 8 states have return successors, (24), 9 states have call predecessors, (24), 13 states have call successors, (24) Word has length 120 [2025-02-05 15:58:39,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:58:39,979 INFO L225 Difference]: With dead ends: 91 [2025-02-05 15:58:39,979 INFO L226 Difference]: Without dead ends: 52 [2025-02-05 15:58:39,979 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 228 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=304, Invalid=752, Unknown=0, NotChecked=0, Total=1056 [2025-02-05 15:58:39,980 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 43 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:58:39,980 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 88 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:58:39,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2025-02-05 15:58:39,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2025-02-05 15:58:39,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 33 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (14), 9 states have call predecessors, (14), 7 states have call successors, (14) [2025-02-05 15:58:39,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2025-02-05 15:58:39,988 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 120 [2025-02-05 15:58:39,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:58:39,993 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2025-02-05 15:58:39,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 13 states have call successors, (20), 2 states have call predecessors, (20), 8 states have return successors, (24), 9 states have call predecessors, (24), 13 states have call successors, (24) [2025-02-05 15:58:39,993 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2025-02-05 15:58:39,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2025-02-05 15:58:39,994 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:58:39,994 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:58:40,004 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 15:58:40,194 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 15:58:40,195 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:58:40,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:58:40,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1813016480, now seen corresponding path program 6 times [2025-02-05 15:58:40,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:58:40,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088580737] [2025-02-05 15:58:40,195 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 15:58:40,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:58:40,201 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 106 statements into 13 equivalence classes. [2025-02-05 15:58:40,225 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 92 of 106 statements. [2025-02-05 15:58:40,225 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-02-05 15:58:40,225 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:40,374 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 45 proven. 223 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2025-02-05 15:58:40,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:58:40,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088580737] [2025-02-05 15:58:40,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088580737] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:58:40,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032109106] [2025-02-05 15:58:40,374 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 15:58:40,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:40,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:58:40,378 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 15:58:40,380 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 15:58:40,408 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 106 statements into 13 equivalence classes. [2025-02-05 15:58:40,428 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 92 of 106 statements. [2025-02-05 15:58:40,428 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-02-05 15:58:40,428 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:40,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-05 15:58:40,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:58:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 229 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2025-02-05 15:58:40,467 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:58:41,069 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 255 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2025-02-05 15:58:41,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032109106] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:58:41,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:58:41,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 16 [2025-02-05 15:58:41,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109944084] [2025-02-05 15:58:41,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:58:41,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-05 15:58:41,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:58:41,073 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-05 15:58:41,073 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2025-02-05 15:58:41,073 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 16 states, 14 states have (on average 3.5) internal successors, (49), 16 states have internal predecessors, (49), 12 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 7 states have call predecessors, (18), 12 states have call successors, (18) [2025-02-05 15:58:41,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:58:41,150 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2025-02-05 15:58:41,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 15:58:41,150 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.5) internal successors, (49), 16 states have internal predecessors, (49), 12 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 7 states have call predecessors, (18), 12 states have call successors, (18) Word has length 106 [2025-02-05 15:58:41,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:58:41,151 INFO L225 Difference]: With dead ends: 58 [2025-02-05 15:58:41,153 INFO L226 Difference]: Without dead ends: 54 [2025-02-05 15:58:41,154 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 204 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2025-02-05 15:58:41,154 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:58:41,154 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 72 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:58:41,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-02-05 15:58:41,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2025-02-05 15:58:41,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.105263157894737) internal successors, (42), 36 states have internal predecessors, (42), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (21), 11 states have call predecessors, (21), 8 states have call successors, (21) [2025-02-05 15:58:41,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 71 transitions. [2025-02-05 15:58:41,163 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 71 transitions. Word has length 106 [2025-02-05 15:58:41,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:58:41,163 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 71 transitions. [2025-02-05 15:58:41,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.5) internal successors, (49), 16 states have internal predecessors, (49), 12 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 7 states have call predecessors, (18), 12 states have call successors, (18) [2025-02-05 15:58:41,163 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 71 transitions. [2025-02-05 15:58:41,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2025-02-05 15:58:41,165 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:58:41,165 INFO L218 NwaCegarLoop]: trace histogram [39, 39, 31, 19, 19, 19, 19, 19, 19, 19, 12, 8, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:58:41,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-05 15:58:41,366 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 15:58:41,366 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:58:41,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:58:41,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1241057303, now seen corresponding path program 7 times [2025-02-05 15:58:41,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:58:41,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780343471] [2025-02-05 15:58:41,371 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 15:58:41,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:58:41,384 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 269 statements into 1 equivalence classes. [2025-02-05 15:58:41,414 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 269 of 269 statements. [2025-02-05 15:58:41,415 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:58:41,415 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:41,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4113 backedges. 142 proven. 942 refuted. 0 times theorem prover too weak. 3029 trivial. 0 not checked. [2025-02-05 15:58:41,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:58:41,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780343471] [2025-02-05 15:58:41,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780343471] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:58:41,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688296499] [2025-02-05 15:58:41,872 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 15:58:41,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:41,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:58:41,874 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 15:58:41,875 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 15:58:41,923 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 269 statements into 1 equivalence classes. [2025-02-05 15:58:41,966 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 269 of 269 statements. [2025-02-05 15:58:41,966 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:58:41,966 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:41,970 INFO L256 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 15:58:41,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:58:42,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4113 backedges. 142 proven. 942 refuted. 0 times theorem prover too weak. 3029 trivial. 0 not checked. [2025-02-05 15:58:42,019 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:58:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4113 backedges. 142 proven. 982 refuted. 0 times theorem prover too weak. 2989 trivial. 0 not checked. [2025-02-05 15:58:43,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688296499] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:58:43,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:58:43,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 16 [2025-02-05 15:58:43,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481336945] [2025-02-05 15:58:43,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:58:43,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-05 15:58:43,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:58:43,272 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-05 15:58:43,273 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2025-02-05 15:58:43,273 INFO L87 Difference]: Start difference. First operand 54 states and 71 transitions. Second operand has 16 states, 15 states have (on average 3.4) internal successors, (51), 16 states have internal predecessors, (51), 13 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 7 states have call predecessors, (18), 13 states have call successors, (18) [2025-02-05 15:58:43,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:58:43,372 INFO L93 Difference]: Finished difference Result 63 states and 88 transitions. [2025-02-05 15:58:43,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 15:58:43,372 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 16 states have internal predecessors, (51), 13 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 7 states have call predecessors, (18), 13 states have call successors, (18) Word has length 269 [2025-02-05 15:58:43,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:58:43,374 INFO L225 Difference]: With dead ends: 63 [2025-02-05 15:58:43,374 INFO L226 Difference]: Without dead ends: 59 [2025-02-05 15:58:43,374 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 530 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2025-02-05 15:58:43,374 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 51 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:58:43,374 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 74 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:58:43,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-02-05 15:58:43,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2025-02-05 15:58:43,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 39 states have internal predecessors, (45), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (30), 13 states have call predecessors, (30), 9 states have call successors, (30) [2025-02-05 15:58:43,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 84 transitions. [2025-02-05 15:58:43,387 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 84 transitions. Word has length 269 [2025-02-05 15:58:43,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:58:43,388 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 84 transitions. [2025-02-05 15:58:43,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 16 states have internal predecessors, (51), 13 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 7 states have call predecessors, (18), 13 states have call successors, (18) [2025-02-05 15:58:43,388 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 84 transitions. [2025-02-05 15:58:43,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2025-02-05 15:58:43,392 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:58:43,392 INFO L218 NwaCegarLoop]: trace histogram [47, 47, 38, 23, 23, 23, 23, 23, 23, 23, 15, 9, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:58:43,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-05 15:58:43,596 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 15:58:43,596 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:58:43,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:58:43,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1955485102, now seen corresponding path program 8 times [2025-02-05 15:58:43,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:58:43,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403742842] [2025-02-05 15:58:43,598 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:58:43,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:58:43,612 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 324 statements into 2 equivalence classes. [2025-02-05 15:58:43,638 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 324 of 324 statements. [2025-02-05 15:58:43,638 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:58:43,638 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:43,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 581 proven. 634 refuted. 0 times theorem prover too weak. 4824 trivial. 0 not checked. [2025-02-05 15:58:43,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:58:43,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403742842] [2025-02-05 15:58:43,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403742842] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:58:43,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521518145] [2025-02-05 15:58:43,894 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:58:43,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:43,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:58:43,896 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 15:58:43,897 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 15:58:43,957 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 324 statements into 2 equivalence classes. [2025-02-05 15:58:44,012 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 324 of 324 statements. [2025-02-05 15:58:44,013 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:58:44,013 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:44,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-05 15:58:44,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:58:44,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 707 proven. 851 refuted. 0 times theorem prover too weak. 4481 trivial. 0 not checked. [2025-02-05 15:58:44,082 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:58:45,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 709 proven. 900 refuted. 0 times theorem prover too weak. 4430 trivial. 0 not checked. [2025-02-05 15:58:45,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521518145] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:58:45,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:58:45,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 17] total 21 [2025-02-05 15:58:45,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683891700] [2025-02-05 15:58:45,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:58:45,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-05 15:58:45,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:58:45,637 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-05 15:58:45,637 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2025-02-05 15:58:45,638 INFO L87 Difference]: Start difference. First operand 59 states and 84 transitions. Second operand has 21 states, 20 states have (on average 3.1) internal successors, (62), 21 states have internal predecessors, (62), 15 states have call successors, (19), 1 states have call predecessors, (19), 8 states have return successors, (25), 11 states have call predecessors, (25), 15 states have call successors, (25) [2025-02-05 15:58:45,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:58:45,751 INFO L93 Difference]: Finished difference Result 94 states and 179 transitions. [2025-02-05 15:58:45,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-05 15:58:45,751 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.1) internal successors, (62), 21 states have internal predecessors, (62), 15 states have call successors, (19), 1 states have call predecessors, (19), 8 states have return successors, (25), 11 states have call predecessors, (25), 15 states have call successors, (25) Word has length 324 [2025-02-05 15:58:45,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:58:45,752 INFO L225 Difference]: With dead ends: 94 [2025-02-05 15:58:45,752 INFO L226 Difference]: Without dead ends: 64 [2025-02-05 15:58:45,753 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 634 SyntacticMatches, 8 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2025-02-05 15:58:45,753 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:58:45,753 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 131 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:58:45,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-02-05 15:58:45,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2025-02-05 15:58:45,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 43 states have (on average 1.069767441860465) internal successors, (46), 41 states have internal predecessors, (46), 9 states have call successors, (9), 6 states have call predecessors, (9), 9 states have return successors, (23), 14 states have call predecessors, (23), 9 states have call successors, (23) [2025-02-05 15:58:45,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2025-02-05 15:58:45,758 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 324 [2025-02-05 15:58:45,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:58:45,759 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2025-02-05 15:58:45,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.1) internal successors, (62), 21 states have internal predecessors, (62), 15 states have call successors, (19), 1 states have call predecessors, (19), 8 states have return successors, (25), 11 states have call predecessors, (25), 15 states have call successors, (25) [2025-02-05 15:58:45,759 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2025-02-05 15:58:45,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2025-02-05 15:58:45,761 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:58:45,761 INFO L218 NwaCegarLoop]: trace histogram [55, 55, 44, 27, 27, 27, 27, 27, 27, 27, 17, 11, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:58:45,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-05 15:58:45,962 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 15:58:45,962 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:58:45,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:58:45,963 INFO L85 PathProgramCache]: Analyzing trace with hash 678741960, now seen corresponding path program 9 times [2025-02-05 15:58:45,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:58:45,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859409940] [2025-02-05 15:58:45,963 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:58:45,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:58:45,976 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 378 statements into 50 equivalence classes. [2025-02-05 15:58:46,005 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) and asserted 193 of 378 statements. [2025-02-05 15:58:46,005 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2025-02-05 15:58:46,005 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8290 backedges. 1617 proven. 357 refuted. 0 times theorem prover too weak. 6316 trivial. 0 not checked. [2025-02-05 15:58:46,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:58:46,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859409940] [2025-02-05 15:58:46,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859409940] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:58:46,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634652996] [2025-02-05 15:58:46,167 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:58:46,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:46,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:58:46,171 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 15:58:46,171 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 15:58:46,246 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 378 statements into 50 equivalence classes. [2025-02-05 15:58:46,288 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) and asserted 193 of 378 statements. [2025-02-05 15:58:46,288 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2025-02-05 15:58:46,288 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:46,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 15:58:46,293 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:58:46,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8290 backedges. 2911 proven. 189 refuted. 0 times theorem prover too weak. 5190 trivial. 0 not checked. [2025-02-05 15:58:46,342 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:58:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8290 backedges. 1617 proven. 367 refuted. 0 times theorem prover too weak. 6306 trivial. 0 not checked. [2025-02-05 15:58:47,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634652996] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:58:47,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:58:47,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 15] total 19 [2025-02-05 15:58:47,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61902999] [2025-02-05 15:58:47,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:58:47,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-05 15:58:47,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:58:47,532 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-05 15:58:47,532 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2025-02-05 15:58:47,532 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 11 states have call successors, (19), 2 states have call predecessors, (19), 9 states have return successors, (25), 11 states have call predecessors, (25), 11 states have call successors, (25) [2025-02-05 15:58:47,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:58:47,847 INFO L93 Difference]: Finished difference Result 141 states and 192 transitions. [2025-02-05 15:58:47,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-05 15:58:47,847 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 11 states have call successors, (19), 2 states have call predecessors, (19), 9 states have return successors, (25), 11 states have call predecessors, (25), 11 states have call successors, (25) Word has length 378 [2025-02-05 15:58:47,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:58:47,849 INFO L225 Difference]: With dead ends: 141 [2025-02-05 15:58:47,849 INFO L226 Difference]: Without dead ends: 76 [2025-02-05 15:58:47,850 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 745 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=370, Invalid=890, Unknown=0, NotChecked=0, Total=1260 [2025-02-05 15:58:47,850 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 77 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:58:47,851 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 88 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:58:47,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2025-02-05 15:58:47,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2025-02-05 15:58:47,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 46 states have internal predecessors, (53), 10 states have call successors, (10), 8 states have call predecessors, (10), 9 states have return successors, (24), 14 states have call predecessors, (24), 10 states have call successors, (24) [2025-02-05 15:58:47,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2025-02-05 15:58:47,859 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 378 [2025-02-05 15:58:47,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:58:47,859 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2025-02-05 15:58:47,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 11 states have call successors, (19), 2 states have call predecessors, (19), 9 states have return successors, (25), 11 states have call predecessors, (25), 11 states have call successors, (25) [2025-02-05 15:58:47,859 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2025-02-05 15:58:47,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2025-02-05 15:58:47,860 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:58:47,860 INFO L218 NwaCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:58:47,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-05 15:58:48,061 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 15:58:48,061 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:58:48,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:58:48,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1946424999, now seen corresponding path program 10 times [2025-02-05 15:58:48,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:58:48,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623357515] [2025-02-05 15:58:48,062 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:58:48,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:58:48,068 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 283 statements into 2 equivalence classes. [2025-02-05 15:58:48,083 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 283 of 283 statements. [2025-02-05 15:58:48,083 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 15:58:48,083 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2025-02-05 15:58:49,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:58:49,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623357515] [2025-02-05 15:58:49,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623357515] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:58:49,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973599289] [2025-02-05 15:58:49,647 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:58:49,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:49,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:58:49,649 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 15:58:49,651 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 15:58:49,747 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 283 statements into 2 equivalence classes. [2025-02-05 15:58:49,794 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 283 of 283 statements. [2025-02-05 15:58:49,794 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 15:58:49,794 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:49,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 167 conjuncts are in the unsatisfiable core [2025-02-05 15:58:49,805 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:58:50,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2025-02-05 15:58:50,222 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:58:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2025-02-05 15:58:51,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973599289] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:58:51,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:58:51,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 28 [2025-02-05 15:58:51,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214959467] [2025-02-05 15:58:51,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:58:51,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-02-05 15:58:51,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:58:51,327 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-02-05 15:58:51,327 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2025-02-05 15:58:51,327 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (7), 1 states have call predecessors, (7), 7 states have return successors, (18), 18 states have call predecessors, (18), 6 states have call successors, (18) [2025-02-05 15:58:51,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:58:51,538 INFO L93 Difference]: Finished difference Result 95 states and 126 transitions. [2025-02-05 15:58:51,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-05 15:58:51,538 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (7), 1 states have call predecessors, (7), 7 states have return successors, (18), 18 states have call predecessors, (18), 6 states have call successors, (18) Word has length 283 [2025-02-05 15:58:51,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:58:51,541 INFO L225 Difference]: With dead ends: 95 [2025-02-05 15:58:51,541 INFO L226 Difference]: Without dead ends: 88 [2025-02-05 15:58:51,542 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 623 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2025-02-05 15:58:51,542 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:58:51,542 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 729 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:58:51,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2025-02-05 15:58:51,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2025-02-05 15:58:51,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 53 states have internal predecessors, (60), 13 states have call successors, (13), 8 states have call predecessors, (13), 11 states have return successors, (39), 19 states have call predecessors, (39), 13 states have call successors, (39) [2025-02-05 15:58:51,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 112 transitions. [2025-02-05 15:58:51,555 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 112 transitions. Word has length 283 [2025-02-05 15:58:51,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:58:51,555 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 112 transitions. [2025-02-05 15:58:51,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (7), 1 states have call predecessors, (7), 7 states have return successors, (18), 18 states have call predecessors, (18), 6 states have call successors, (18) [2025-02-05 15:58:51,556 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 112 transitions. [2025-02-05 15:58:51,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2025-02-05 15:58:51,557 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:58:51,558 INFO L218 NwaCegarLoop]: trace histogram [47, 47, 38, 23, 23, 23, 23, 23, 23, 23, 15, 9, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:58:51,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-05 15:58:51,762 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 15:58:51,762 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:58:51,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:58:51,762 INFO L85 PathProgramCache]: Analyzing trace with hash -246935138, now seen corresponding path program 11 times [2025-02-05 15:58:51,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:58:51,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073084413] [2025-02-05 15:58:51,763 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:58:51,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:58:51,776 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 324 statements into 41 equivalence classes. [2025-02-05 15:58:51,818 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) and asserted 284 of 324 statements. [2025-02-05 15:58:51,819 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2025-02-05 15:58:51,819 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:52,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 1219 proven. 1040 refuted. 0 times theorem prover too weak. 3780 trivial. 0 not checked. [2025-02-05 15:58:52,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:58:52,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073084413] [2025-02-05 15:58:52,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073084413] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:58:52,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478905920] [2025-02-05 15:58:52,260 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:58:52,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:52,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:58:52,263 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 15:58:52,265 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 15:58:52,355 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 324 statements into 41 equivalence classes. [2025-02-05 15:58:52,428 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) and asserted 284 of 324 statements. [2025-02-05 15:58:52,428 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2025-02-05 15:58:52,428 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:52,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-05 15:58:52,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:58:52,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 1305 proven. 1096 refuted. 0 times theorem prover too weak. 3638 trivial. 0 not checked. [2025-02-05 15:58:52,536 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:58:54,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 1311 proven. 1151 refuted. 0 times theorem prover too weak. 3577 trivial. 0 not checked. [2025-02-05 15:58:54,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478905920] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:58:54,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:58:54,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 25] total 31 [2025-02-05 15:58:54,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696838260] [2025-02-05 15:58:54,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:58:54,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-02-05 15:58:54,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:58:54,825 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-02-05 15:58:54,825 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2025-02-05 15:58:54,825 INFO L87 Difference]: Start difference. First operand 81 states and 112 transitions. Second operand has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 22 states have call successors, (27), 1 states have call predecessors, (27), 14 states have return successors, (36), 15 states have call predecessors, (36), 22 states have call successors, (36) [2025-02-05 15:58:55,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:58:55,257 INFO L93 Difference]: Finished difference Result 189 states and 318 transitions. [2025-02-05 15:58:55,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-02-05 15:58:55,257 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 22 states have call successors, (27), 1 states have call predecessors, (27), 14 states have return successors, (36), 15 states have call predecessors, (36), 22 states have call successors, (36) Word has length 324 [2025-02-05 15:58:55,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:58:55,259 INFO L225 Difference]: With dead ends: 189 [2025-02-05 15:58:55,260 INFO L226 Difference]: Without dead ends: 90 [2025-02-05 15:58:55,261 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 630 SyntacticMatches, 12 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=2679, Unknown=0, NotChecked=0, Total=3540 [2025-02-05 15:58:55,261 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 135 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:58:55,261 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 178 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:58:55,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2025-02-05 15:58:55,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 81. [2025-02-05 15:58:55,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 55 states have internal predecessors, (59), 14 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (24), 15 states have call predecessors, (24), 14 states have call successors, (24) [2025-02-05 15:58:55,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2025-02-05 15:58:55,273 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 324 [2025-02-05 15:58:55,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:58:55,273 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2025-02-05 15:58:55,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 22 states have call successors, (27), 1 states have call predecessors, (27), 14 states have return successors, (36), 15 states have call predecessors, (36), 22 states have call successors, (36) [2025-02-05 15:58:55,273 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2025-02-05 15:58:55,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2025-02-05 15:58:55,274 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:58:55,276 INFO L218 NwaCegarLoop]: trace histogram [51, 51, 41, 25, 25, 25, 25, 25, 25, 25, 16, 10, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:58:55,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-05 15:58:55,480 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 15:58:55,480 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:58:55,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:58:55,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1777824429, now seen corresponding path program 12 times [2025-02-05 15:58:55,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:58:55,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99731194] [2025-02-05 15:58:55,480 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 15:58:55,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:58:55,488 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 351 statements into 45 equivalence classes. [2025-02-05 15:58:55,512 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) and asserted 210 of 351 statements. [2025-02-05 15:58:55,512 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2025-02-05 15:58:55,512 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:55,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 492 proven. 1086 refuted. 0 times theorem prover too weak. 5542 trivial. 0 not checked. [2025-02-05 15:58:55,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:58:55,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99731194] [2025-02-05 15:58:55,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99731194] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:58:55,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33170595] [2025-02-05 15:58:55,785 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 15:58:55,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:58:55,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:58:55,789 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 15:58:55,789 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 15:58:55,884 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 351 statements into 45 equivalence classes. [2025-02-05 15:58:55,931 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) and asserted 210 of 351 statements. [2025-02-05 15:58:55,931 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2025-02-05 15:58:55,931 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:58:55,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-05 15:58:55,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:58:56,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 524 proven. 1187 refuted. 0 times theorem prover too weak. 5409 trivial. 0 not checked. [2025-02-05 15:58:56,031 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:58:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 530 proven. 1232 refuted. 0 times theorem prover too weak. 5358 trivial. 0 not checked. [2025-02-05 15:58:57,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33170595] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:58:57,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:58:57,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 17] total 25 [2025-02-05 15:58:57,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975639502] [2025-02-05 15:58:57,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:58:57,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-05 15:58:57,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:58:57,653 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-05 15:58:57,654 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2025-02-05 15:58:57,654 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand has 25 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 25 states have internal predecessors, (68), 17 states have call successors, (21), 1 states have call predecessors, (21), 9 states have return successors, (26), 13 states have call predecessors, (26), 17 states have call successors, (26) [2025-02-05 15:58:57,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:58:57,792 INFO L93 Difference]: Finished difference Result 162 states and 193 transitions. [2025-02-05 15:58:57,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-05 15:58:57,793 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 25 states have internal predecessors, (68), 17 states have call successors, (21), 1 states have call predecessors, (21), 9 states have return successors, (26), 13 states have call predecessors, (26), 17 states have call successors, (26) Word has length 351 [2025-02-05 15:58:57,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:58:57,793 INFO L225 Difference]: With dead ends: 162 [2025-02-05 15:58:57,794 INFO L226 Difference]: Without dead ends: 0 [2025-02-05 15:58:57,794 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 722 GetRequests, 688 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2025-02-05 15:58:57,795 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 20 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:58:57,795 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 99 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:58:57,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-02-05 15:58:57,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-02-05 15:58:57,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 15:58:57,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-02-05 15:58:57,796 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 351 [2025-02-05 15:58:57,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:58:57,796 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-02-05 15:58:57,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 25 states have internal predecessors, (68), 17 states have call successors, (21), 1 states have call predecessors, (21), 9 states have return successors, (26), 13 states have call predecessors, (26), 17 states have call successors, (26) [2025-02-05 15:58:57,796 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-02-05 15:58:57,796 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-02-05 15:58:57,798 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-02-05 15:58:57,807 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 15:58:57,998 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 15:58:58,001 INFO L422 BasicCegarLoop]: Path program histogram: [12, 1, 1, 1] [2025-02-05 15:58:58,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-02-05 15:58:59,141 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-05 15:58:59,145 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.02 03:58:59 BoogieIcfgContainer [2025-02-05 15:58:59,146 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-05 15:58:59,146 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-05 15:58:59,146 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-05 15:58:59,147 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-05 15:58:59,147 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:58:33" (3/4) ... [2025-02-05 15:58:59,148 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-02-05 15:58:59,152 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure fibo [2025-02-05 15:58:59,155 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2025-02-05 15:58:59,155 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2025-02-05 15:58:59,156 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-02-05 15:58:59,156 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-02-05 15:58:59,209 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-02-05 15:58:59,209 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.yml [2025-02-05 15:58:59,209 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-05 15:58:59,210 INFO L158 Benchmark]: Toolchain (without parser) took 25945.55ms. Allocated memory was 167.8MB in the beginning and 620.8MB in the end (delta: 453.0MB). Free memory was 124.9MB in the beginning and 448.7MB in the end (delta: -323.8MB). Peak memory consumption was 123.4MB. Max. memory is 16.1GB. [2025-02-05 15:58:59,210 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 201.3MB. Free memory is still 116.3MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-05 15:58:59,211 INFO L158 Benchmark]: CACSL2BoogieTranslator took 147.43ms. Allocated memory is still 167.8MB. Free memory was 123.9MB in the beginning and 113.4MB in the end (delta: 10.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-05 15:58:59,211 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.86ms. Allocated memory is still 167.8MB. Free memory was 113.4MB in the beginning and 112.5MB in the end (delta: 957.5kB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-05 15:58:59,211 INFO L158 Benchmark]: Boogie Preprocessor took 18.89ms. Allocated memory is still 167.8MB. Free memory was 112.5MB in the beginning and 111.5MB in the end (delta: 990.1kB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-05 15:58:59,211 INFO L158 Benchmark]: IcfgBuilder took 166.38ms. Allocated memory is still 167.8MB. Free memory was 111.5MB in the beginning and 102.4MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-05 15:58:59,212 INFO L158 Benchmark]: TraceAbstraction took 25520.54ms. Allocated memory was 167.8MB in the beginning and 620.8MB in the end (delta: 453.0MB). Free memory was 101.4MB in the beginning and 452.8MB in the end (delta: -351.4MB). Peak memory consumption was 335.9MB. Max. memory is 16.1GB. [2025-02-05 15:58:59,212 INFO L158 Benchmark]: Witness Printer took 63.10ms. Allocated memory is still 620.8MB. Free memory was 452.8MB in the beginning and 448.7MB in the end (delta: 4.1MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-05 15:58:59,213 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 201.3MB. Free memory is still 116.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 147.43ms. Allocated memory is still 167.8MB. Free memory was 123.9MB in the beginning and 113.4MB in the end (delta: 10.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 18.86ms. Allocated memory is still 167.8MB. Free memory was 113.4MB in the beginning and 112.5MB in the end (delta: 957.5kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 18.89ms. Allocated memory is still 167.8MB. Free memory was 112.5MB in the beginning and 111.5MB in the end (delta: 990.1kB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 166.38ms. Allocated memory is still 167.8MB. Free memory was 111.5MB in the beginning and 102.4MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 25520.54ms. Allocated memory was 167.8MB in the beginning and 620.8MB in the end (delta: 453.0MB). Free memory was 101.4MB in the beginning and 452.8MB in the end (delta: -351.4MB). Peak memory consumption was 335.9MB. Max. memory is 16.1GB. * Witness Printer took 63.10ms. Allocated memory is still 620.8MB. Free memory was 452.8MB in the beginning and 448.7MB in the end (delta: 4.1MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 29]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 24.3s, OverallIterations: 15, TraceHistogramMax: 55, PathProgramHistogramMax: 12, EmptinessCheckTime: 0.0s, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 565 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 514 mSDsluCounter, 1885 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1578 mSDsCounter, 472 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2225 IncrementalHoareTripleChecker+Invalid, 2697 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 472 mSolverCounterUnsat, 307 mSDtfsCounter, 2225 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5151 GetRequests, 4769 SyntacticMatches, 68 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2393 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=13, InterpolantAutomatonStates: 200, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 32 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 17.5s InterpolantComputationTime, 4843 NumberOfCodeBlocks, 3871 NumberOfCodeBlocksAsserted, 246 NumberOfCheckSat, 7213 ConstructedInterpolants, 0 QuantifiedInterpolants, 11765 SizeOfPredicates, 50 NumberOfNonLiveVariables, 4455 ConjunctsInSsa, 314 ConjunctsInUnsatCore, 41 InterpolantComputations, 2 PerfectInterpolantSequences, 95490/114843 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-02-05 15:58:59,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE