./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/egcd3-ll.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/nla-digbench/egcd3-ll.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 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 14:59:26,375 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 14:59:26,432 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 14:59:26,439 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 14:59:26,440 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 14:59:26,457 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 14:59:26,458 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 14:59:26,458 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 14:59:26,458 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 14:59:26,458 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 14:59:26,458 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 14:59:26,458 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 14:59:26,458 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 14:59:26,459 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 14:59:26,459 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 14:59:26,459 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 14:59:26,459 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 14:59:26,459 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 14:59:26,459 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 14:59:26,459 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 14:59:26,459 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 14:59:26,459 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 14:59:26,459 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 14:59:26,459 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 14:59:26,460 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 14:59:26,460 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 14:59:26,460 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 14:59:26,460 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 14:59:26,460 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 14:59:26,460 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 14:59:26,460 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 14:59:26,460 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 14:59:26,460 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 14:59:26,460 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 14:59:26,461 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 14:59:26,461 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 14:59:26,461 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 14:59:26,461 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 14:59:26,461 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 14:59:26,461 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 14:59:26,461 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 14:59:26,461 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 14:59:26,461 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 14:59:26,461 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 -> 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be [2025-02-05 14:59:26,762 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 14:59:26,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 14:59:26,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 14:59:26,775 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 14:59:26,775 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 14:59:26,776 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/egcd3-ll.c [2025-02-05 14:59:28,010 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/f1e91b307/7ec196400f0b4b36b6d23aef23a41504/FLAGb48a260f1 [2025-02-05 14:59:28,258 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 14:59:28,259 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c [2025-02-05 14:59:28,269 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/f1e91b307/7ec196400f0b4b36b6d23aef23a41504/FLAGb48a260f1 [2025-02-05 14:59:28,283 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/f1e91b307/7ec196400f0b4b36b6d23aef23a41504 [2025-02-05 14:59:28,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 14:59:28,286 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 14:59:28,286 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 14:59:28,287 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 14:59:28,289 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 14:59:28,290 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 02:59:28" (1/1) ... [2025-02-05 14:59:28,290 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26d0c8be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:59:28, skipping insertion in model container [2025-02-05 14:59:28,290 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 02:59:28" (1/1) ... [2025-02-05 14:59:28,299 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 14:59:28,387 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/nla-digbench/egcd3-ll.c[490,503] [2025-02-05 14:59:28,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 14:59:28,408 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 14:59:28,415 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/nla-digbench/egcd3-ll.c[490,503] [2025-02-05 14:59:28,426 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 14:59:28,438 INFO L204 MainTranslator]: Completed translation [2025-02-05 14:59:28,438 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:59:28 WrapperNode [2025-02-05 14:59:28,438 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 14:59:28,439 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 14:59:28,439 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 14:59:28,439 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 14:59:28,444 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:59:28" (1/1) ... [2025-02-05 14:59:28,451 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:59:28" (1/1) ... [2025-02-05 14:59:28,464 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 72 [2025-02-05 14:59:28,464 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 14:59:28,465 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 14:59:28,465 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 14:59:28,465 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 14:59:28,470 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:59:28" (1/1) ... [2025-02-05 14:59:28,470 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:59:28" (1/1) ... [2025-02-05 14:59:28,476 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:59:28" (1/1) ... [2025-02-05 14:59:28,483 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-05 14:59:28,484 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:59:28" (1/1) ... [2025-02-05 14:59:28,484 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:59:28" (1/1) ... [2025-02-05 14:59:28,485 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:59:28" (1/1) ... [2025-02-05 14:59:28,486 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:59:28" (1/1) ... [2025-02-05 14:59:28,486 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:59:28" (1/1) ... [2025-02-05 14:59:28,487 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:59:28" (1/1) ... [2025-02-05 14:59:28,488 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 14:59:28,489 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 14:59:28,489 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 14:59:28,489 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 14:59:28,489 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:59:28" (1/1) ... [2025-02-05 14:59:28,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 14:59:28,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:59:28,514 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-05 14:59:28,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-05 14:59:28,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 14:59:28,532 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-02-05 14:59:28,533 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-02-05 14:59:28,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 14:59:28,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 14:59:28,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 14:59:28,533 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-05 14:59:28,533 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-05 14:59:28,589 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 14:59:28,591 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 14:59:28,690 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-02-05 14:59:28,691 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 14:59:28,700 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 14:59:28,700 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 14:59:28,702 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 02:59:28 BoogieIcfgContainer [2025-02-05 14:59:28,702 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 14:59:28,707 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 14:59:28,707 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 14:59:28,710 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 14:59:28,714 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 02:59:28" (1/3) ... [2025-02-05 14:59:28,715 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e3e9004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 02:59:28, skipping insertion in model container [2025-02-05 14:59:28,715 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:59:28" (2/3) ... [2025-02-05 14:59:28,715 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e3e9004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 02:59:28, skipping insertion in model container [2025-02-05 14:59:28,715 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 02:59:28" (3/3) ... [2025-02-05 14:59:28,716 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2025-02-05 14:59:28,725 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 14:59:28,725 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd3-ll.c that has 3 procedures, 32 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-02-05 14:59:28,778 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 14:59:28,789 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;@3478bef3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 14:59:28,790 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 14:59:28,792 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 14:59:28,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-02-05 14:59:28,798 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:59:28,799 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:59:28,800 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:59:28,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:59:28,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1412558072, now seen corresponding path program 1 times [2025-02-05 14:59:28,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:59:28,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214437946] [2025-02-05 14:59:28,810 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:59:28,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:59:28,853 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-05 14:59:28,862 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-05 14:59:28,862 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:59:28,862 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:59:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-05 14:59:28,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:59:28,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214437946] [2025-02-05 14:59:28,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214437946] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:59:28,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936513307] [2025-02-05 14:59:28,892 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:59:28,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:59:28,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:59:28,894 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:59:28,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-05 14:59:28,921 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-05 14:59:28,933 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-05 14:59:28,933 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:59:28,933 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:59:28,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-02-05 14:59:28,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:59:28,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-05 14:59:28,944 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 14:59:28,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936513307] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:59:28,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 14:59:28,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-02-05 14:59:28,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415076507] [2025-02-05 14:59:28,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:59:28,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-05 14:59:28,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:59:28,961 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-05 14:59:28,961 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-05 14:59:28,963 INFO L87 Difference]: Start difference. First operand has 32 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 14:59:28,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:59:28,973 INFO L93 Difference]: Finished difference Result 61 states and 91 transitions. [2025-02-05 14:59:28,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-05 14:59:28,974 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2025-02-05 14:59:28,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:59:28,978 INFO L225 Difference]: With dead ends: 61 [2025-02-05 14:59:28,978 INFO L226 Difference]: Without dead ends: 28 [2025-02-05 14:59:28,979 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-05 14:59:28,981 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:59:28,981 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:59:28,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-02-05 14:59:28,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2025-02-05 14:59:28,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 14:59:29,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2025-02-05 14:59:29,002 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 18 [2025-02-05 14:59:29,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:59:29,002 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2025-02-05 14:59:29,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 14:59:29,003 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2025-02-05 14:59:29,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-05 14:59:29,003 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:59:29,003 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:59:29,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-05 14:59:29,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-02-05 14:59:29,207 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:59:29,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:59:29,209 INFO L85 PathProgramCache]: Analyzing trace with hash 2102704058, now seen corresponding path program 1 times [2025-02-05 14:59:29,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:59:29,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108164293] [2025-02-05 14:59:29,210 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:59:29,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:59:29,225 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-05 14:59:29,262 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-05 14:59:29,262 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:59:29,262 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:59:29,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:59:29,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:59:29,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108164293] [2025-02-05 14:59:29,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108164293] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:59:29,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 14:59:29,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-05 14:59:29,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745558555] [2025-02-05 14:59:29,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:59:29,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-05 14:59:29,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:59:29,562 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-05 14:59:29,562 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-05 14:59:29,562 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 14:59:29,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:59:29,673 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2025-02-05 14:59:29,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 14:59:29,674 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2025-02-05 14:59:29,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:59:29,674 INFO L225 Difference]: With dead ends: 47 [2025-02-05 14:59:29,675 INFO L226 Difference]: Without dead ends: 40 [2025-02-05 14:59:29,675 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-05 14:59:29,675 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 20 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:59:29,675 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 110 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:59:29,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-02-05 14:59:29,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2025-02-05 14:59:29,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 14:59:29,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2025-02-05 14:59:29,694 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2025-02-05 14:59:29,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:59:29,694 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2025-02-05 14:59:29,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 14:59:29,694 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2025-02-05 14:59:29,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-02-05 14:59:29,696 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:59:29,696 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:59:29,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-05 14:59:29,696 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:59:29,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:59:29,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1758071867, now seen corresponding path program 1 times [2025-02-05 14:59:29,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:59:29,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874816125] [2025-02-05 14:59:29,700 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:59:29,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:59:29,709 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-05 14:59:29,724 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-05 14:59:29,724 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:59:29,724 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 14:59:29,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [528385921] [2025-02-05 14:59:29,729 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:59:29,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:59:29,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:59:29,731 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:59:29,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-05 14:59:29,763 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-05 14:59:29,782 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-05 14:59:29,783 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:59:29,783 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:59:29,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-05 14:59:29,785 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:59:29,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 14:59:29,878 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 14:59:29,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:59:29,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874816125] [2025-02-05 14:59:29,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 14:59:29,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528385921] [2025-02-05 14:59:29,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528385921] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:59:29,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 14:59:29,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 14:59:29,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383416404] [2025-02-05 14:59:29,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:59:29,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 14:59:29,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:59:29,879 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 14:59:29,879 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 14:59:29,880 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 14:59:29,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:59:29,912 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2025-02-05 14:59:29,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 14:59:29,913 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2025-02-05 14:59:29,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:59:29,913 INFO L225 Difference]: With dead ends: 46 [2025-02-05 14:59:29,913 INFO L226 Difference]: Without dead ends: 44 [2025-02-05 14:59:29,913 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-05 14:59:29,914 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:59:29,914 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 114 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:59:29,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-02-05 14:59:29,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2025-02-05 14:59:29,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-02-05 14:59:29,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2025-02-05 14:59:29,925 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 22 [2025-02-05 14:59:29,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:59:29,925 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2025-02-05 14:59:29,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 14:59:29,926 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2025-02-05 14:59:29,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-02-05 14:59:29,926 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:59:29,926 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:59:29,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-05 14:59:30,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:59:30,134 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:59:30,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:59:30,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1822453950, now seen corresponding path program 1 times [2025-02-05 14:59:30,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:59:30,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860438364] [2025-02-05 14:59:30,135 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:59:30,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:59:30,140 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-05 14:59:30,150 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-05 14:59:30,152 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:59:30,152 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:59:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:59:30,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:59:30,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860438364] [2025-02-05 14:59:30,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860438364] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:59:30,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826990948] [2025-02-05 14:59:30,261 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:59:30,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:59:30,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:59:30,263 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:59:30,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-05 14:59:30,291 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-05 14:59:30,303 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-05 14:59:30,303 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:59:30,303 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:59:30,304 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-05 14:59:30,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:59:30,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:59:30,333 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:59:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:59:30,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826990948] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:59:30,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:59:30,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2025-02-05 14:59:30,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550153827] [2025-02-05 14:59:30,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:59:30,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-05 14:59:30,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:59:30,396 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-05 14:59:30,396 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-02-05 14:59:30,397 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 14:59:30,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:59:30,512 INFO L93 Difference]: Finished difference Result 96 states and 134 transitions. [2025-02-05 14:59:30,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 14:59:30,512 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2025-02-05 14:59:30,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:59:30,513 INFO L225 Difference]: With dead ends: 96 [2025-02-05 14:59:30,513 INFO L226 Difference]: Without dead ends: 89 [2025-02-05 14:59:30,513 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2025-02-05 14:59:30,514 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 60 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:59:30,514 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 185 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:59:30,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2025-02-05 14:59:30,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 64. [2025-02-05 14:59:30,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 46 states have internal predecessors, (57), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2025-02-05 14:59:30,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2025-02-05 14:59:30,524 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 24 [2025-02-05 14:59:30,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:59:30,524 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2025-02-05 14:59:30,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 14:59:30,524 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2025-02-05 14:59:30,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-02-05 14:59:30,525 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:59:30,525 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:59:30,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-05 14:59:30,729 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:59:30,729 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:59:30,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:59:30,730 INFO L85 PathProgramCache]: Analyzing trace with hash -630163452, now seen corresponding path program 1 times [2025-02-05 14:59:30,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:59:30,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421897816] [2025-02-05 14:59:30,730 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:59:30,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:59:30,734 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-05 14:59:30,747 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-05 14:59:30,747 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:59:30,747 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 14:59:30,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2062689474] [2025-02-05 14:59:30,748 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:59:30,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:59:30,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:59:30,750 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:59:30,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-05 14:59:30,770 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-05 14:59:30,779 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-05 14:59:30,779 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:59:30,779 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:59:30,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-05 14:59:30,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:59:30,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 14:59:30,881 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 14:59:30,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:59:30,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421897816] [2025-02-05 14:59:30,881 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 14:59:30,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062689474] [2025-02-05 14:59:30,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062689474] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:59:30,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 14:59:30,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 14:59:30,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111748448] [2025-02-05 14:59:30,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:59:30,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 14:59:30,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:59:30,883 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 14:59:30,883 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 14:59:30,884 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-05 14:59:30,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:59:30,926 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2025-02-05 14:59:30,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 14:59:30,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2025-02-05 14:59:30,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:59:30,928 INFO L225 Difference]: With dead ends: 72 [2025-02-05 14:59:30,929 INFO L226 Difference]: Without dead ends: 70 [2025-02-05 14:59:30,929 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-05 14:59:30,929 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:59:30,930 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 112 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:59:30,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2025-02-05 14:59:30,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2025-02-05 14:59:30,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.25) internal successors, (60), 49 states have internal predecessors, (60), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2025-02-05 14:59:30,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 89 transitions. [2025-02-05 14:59:30,947 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 89 transitions. Word has length 27 [2025-02-05 14:59:30,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:59:30,947 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 89 transitions. [2025-02-05 14:59:30,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-05 14:59:30,947 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 89 transitions. [2025-02-05 14:59:30,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-02-05 14:59:30,948 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:59:30,948 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:59:30,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-05 14:59:31,148 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:59:31,148 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:59:31,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:59:31,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1360687299, now seen corresponding path program 1 times [2025-02-05 14:59:31,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:59:31,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883902293] [2025-02-05 14:59:31,149 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:59:31,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:59:31,158 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-05 14:59:31,165 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-05 14:59:31,166 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:59:31,166 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 14:59:31,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811791414] [2025-02-05 14:59:31,167 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:59:31,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:59:31,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:59:31,169 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:59:31,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-05 14:59:31,206 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-05 14:59:31,220 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-05 14:59:31,220 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:59:31,220 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:59:31,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-05 14:59:31,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:59:31,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:59:31,447 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:59:31,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 14:59:31,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:59:31,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883902293] [2025-02-05 14:59:31,683 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 14:59:31,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811791414] [2025-02-05 14:59:31,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811791414] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:59:31,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 14:59:31,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2025-02-05 14:59:31,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043828270] [2025-02-05 14:59:31,684 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 14:59:31,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-05 14:59:31,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:59:31,684 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-05 14:59:31,684 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2025-02-05 14:59:31,685 INFO L87 Difference]: Start difference. First operand 68 states and 89 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 14:59:32,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:59:32,237 INFO L93 Difference]: Finished difference Result 126 states and 172 transitions. [2025-02-05 14:59:32,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-05 14:59:32,238 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2025-02-05 14:59:32,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:59:32,239 INFO L225 Difference]: With dead ends: 126 [2025-02-05 14:59:32,239 INFO L226 Difference]: Without dead ends: 124 [2025-02-05 14:59:32,239 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2025-02-05 14:59:32,240 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 99 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 14:59:32,240 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 231 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 14:59:32,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2025-02-05 14:59:32,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 103. [2025-02-05 14:59:32,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 74 states have (on average 1.2567567567567568) internal successors, (93), 75 states have internal predecessors, (93), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2025-02-05 14:59:32,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 138 transitions. [2025-02-05 14:59:32,257 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 138 transitions. Word has length 27 [2025-02-05 14:59:32,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:59:32,257 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 138 transitions. [2025-02-05 14:59:32,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 14:59:32,257 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 138 transitions. [2025-02-05 14:59:32,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-02-05 14:59:32,257 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:59:32,257 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:59:32,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-05 14:59:32,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:59:32,458 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:59:32,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:59:32,458 INFO L85 PathProgramCache]: Analyzing trace with hash 915188581, now seen corresponding path program 1 times [2025-02-05 14:59:32,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:59:32,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550809569] [2025-02-05 14:59:32,463 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:59:32,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:59:32,466 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-05 14:59:32,474 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-05 14:59:32,475 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:59:32,476 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 14:59:32,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964820297] [2025-02-05 14:59:32,477 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:59:32,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:59:32,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:59:32,482 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:59:32,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-05 14:59:32,512 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-05 14:59:32,521 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-05 14:59:32,521 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:59:32,521 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:59:32,522 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-05 14:59:32,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:59:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-05 14:59:32,558 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 14:59:32,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:59:32,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550809569] [2025-02-05 14:59:32,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 14:59:32,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964820297] [2025-02-05 14:59:32,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964820297] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:59:32,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 14:59:32,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 14:59:32,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381675795] [2025-02-05 14:59:32,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:59:32,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 14:59:32,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:59:32,559 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 14:59:32,560 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 14:59:32,561 INFO L87 Difference]: Start difference. First operand 103 states and 138 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 14:59:32,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:59:32,629 INFO L93 Difference]: Finished difference Result 149 states and 210 transitions. [2025-02-05 14:59:32,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 14:59:32,629 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2025-02-05 14:59:32,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:59:32,632 INFO L225 Difference]: With dead ends: 149 [2025-02-05 14:59:32,632 INFO L226 Difference]: Without dead ends: 147 [2025-02-05 14:59:32,632 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-05 14:59:32,634 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:59:32,634 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 104 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:59:32,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2025-02-05 14:59:32,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 141. [2025-02-05 14:59:32,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 91 states have (on average 1.2857142857142858) internal successors, (117), 92 states have internal predecessors, (117), 43 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2025-02-05 14:59:32,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 202 transitions. [2025-02-05 14:59:32,674 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 202 transitions. Word has length 32 [2025-02-05 14:59:32,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:59:32,674 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 202 transitions. [2025-02-05 14:59:32,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 14:59:32,675 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 202 transitions. [2025-02-05 14:59:32,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-02-05 14:59:32,675 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:59:32,675 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:59:32,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-05 14:59:32,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-02-05 14:59:32,876 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:59:32,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:59:32,877 INFO L85 PathProgramCache]: Analyzing trace with hash -2079373428, now seen corresponding path program 1 times [2025-02-05 14:59:32,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:59:32,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902882065] [2025-02-05 14:59:32,877 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:59:32,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:59:32,880 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-05 14:59:32,885 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-05 14:59:32,885 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:59:32,885 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 14:59:32,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [530980176] [2025-02-05 14:59:32,886 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:59:32,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:59:32,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:59:32,887 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:59:32,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-05 14:59:32,910 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-05 14:59:32,921 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-05 14:59:32,921 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:59:32,921 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:59:32,922 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-02-05 14:59:32,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:59:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:59:33,157 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:59:33,306 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 14:59:33,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:59:33,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902882065] [2025-02-05 14:59:33,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 14:59:33,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530980176] [2025-02-05 14:59:33,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530980176] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:59:33,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 14:59:33,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2025-02-05 14:59:33,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934826101] [2025-02-05 14:59:33,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 14:59:33,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-05 14:59:33,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:59:33,307 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-05 14:59:33,308 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2025-02-05 14:59:33,308 INFO L87 Difference]: Start difference. First operand 141 states and 202 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2025-02-05 14:59:34,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:59:34,188 INFO L93 Difference]: Finished difference Result 276 states and 410 transitions. [2025-02-05 14:59:34,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-05 14:59:34,189 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 32 [2025-02-05 14:59:34,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:59:34,191 INFO L225 Difference]: With dead ends: 276 [2025-02-05 14:59:34,191 INFO L226 Difference]: Without dead ends: 274 [2025-02-05 14:59:34,192 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=274, Invalid=916, Unknown=0, NotChecked=0, Total=1190 [2025-02-05 14:59:34,192 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 154 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 14:59:34,192 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 260 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 14:59:34,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2025-02-05 14:59:34,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 209. [2025-02-05 14:59:34,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 141 states have (on average 1.2907801418439717) internal successors, (182), 142 states have internal predecessors, (182), 59 states have call successors, (59), 8 states have call predecessors, (59), 8 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2025-02-05 14:59:34,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 299 transitions. [2025-02-05 14:59:34,251 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 299 transitions. Word has length 32 [2025-02-05 14:59:34,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:59:34,251 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 299 transitions. [2025-02-05 14:59:34,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2025-02-05 14:59:34,251 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 299 transitions. [2025-02-05 14:59:34,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-05 14:59:34,256 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:59:34,256 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:59:34,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-05 14:59:34,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:59:34,457 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:59:34,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:59:34,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1199483676, now seen corresponding path program 1 times [2025-02-05 14:59:34,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:59:34,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838793810] [2025-02-05 14:59:34,457 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:59:34,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:59:34,461 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-05 14:59:34,471 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 14:59:34,473 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:59:34,473 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 14:59:34,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544217936] [2025-02-05 14:59:34,474 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:59:34,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:59:34,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:59:34,483 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:59:34,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-05 14:59:34,504 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-05 14:59:34,517 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 14:59:34,517 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:59:34,517 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:59:34,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-05 14:59:34,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:59:34,571 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-05 14:59:34,572 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 14:59:34,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:59:34,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838793810] [2025-02-05 14:59:34,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 14:59:34,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544217936] [2025-02-05 14:59:34,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544217936] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:59:34,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 14:59:34,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 14:59:34,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857271273] [2025-02-05 14:59:34,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:59:34,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 14:59:34,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:59:34,572 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 14:59:34,573 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 14:59:34,573 INFO L87 Difference]: Start difference. First operand 209 states and 299 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-05 14:59:34,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:59:34,725 INFO L93 Difference]: Finished difference Result 306 states and 465 transitions. [2025-02-05 14:59:34,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 14:59:34,725 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2025-02-05 14:59:34,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:59:34,728 INFO L225 Difference]: With dead ends: 306 [2025-02-05 14:59:34,728 INFO L226 Difference]: Without dead ends: 304 [2025-02-05 14:59:34,729 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-05 14:59:34,729 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 4 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:59:34,729 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 112 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:59:34,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2025-02-05 14:59:34,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 283. [2025-02-05 14:59:34,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 158 states have (on average 1.259493670886076) internal successors, (199), 173 states have internal predecessors, (199), 115 states have call successors, (115), 9 states have call predecessors, (115), 9 states have return successors, (114), 100 states have call predecessors, (114), 114 states have call successors, (114) [2025-02-05 14:59:34,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 428 transitions. [2025-02-05 14:59:34,793 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 428 transitions. Word has length 37 [2025-02-05 14:59:34,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:59:34,794 INFO L471 AbstractCegarLoop]: Abstraction has 283 states and 428 transitions. [2025-02-05 14:59:34,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-05 14:59:34,794 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 428 transitions. [2025-02-05 14:59:34,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-05 14:59:34,794 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:59:34,794 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:59:34,800 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 14:59:34,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:59:34,996 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:59:34,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:59:34,996 INFO L85 PathProgramCache]: Analyzing trace with hash 618791997, now seen corresponding path program 2 times [2025-02-05 14:59:34,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:59:34,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246146343] [2025-02-05 14:59:34,996 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:59:34,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:59:35,000 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-02-05 14:59:35,005 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 14:59:35,005 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:59:35,005 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:59:35,043 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-05 14:59:35,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:59:35,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246146343] [2025-02-05 14:59:35,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246146343] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:59:35,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 14:59:35,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 14:59:35,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443328369] [2025-02-05 14:59:35,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:59:35,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 14:59:35,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:59:35,048 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 14:59:35,048 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 14:59:35,048 INFO L87 Difference]: Start difference. First operand 283 states and 428 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 14:59:35,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:59:35,147 INFO L93 Difference]: Finished difference Result 369 states and 551 transitions. [2025-02-05 14:59:35,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 14:59:35,147 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2025-02-05 14:59:35,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:59:35,149 INFO L225 Difference]: With dead ends: 369 [2025-02-05 14:59:35,149 INFO L226 Difference]: Without dead ends: 171 [2025-02-05 14:59:35,150 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-02-05 14:59:35,151 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 18 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:59:35,151 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 140 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:59:35,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2025-02-05 14:59:35,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 163. [2025-02-05 14:59:35,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 86 states have (on average 1.186046511627907) internal successors, (102), 95 states have internal predecessors, (102), 67 states have call successors, (67), 9 states have call predecessors, (67), 9 states have return successors, (66), 58 states have call predecessors, (66), 66 states have call successors, (66) [2025-02-05 14:59:35,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 235 transitions. [2025-02-05 14:59:35,182 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 235 transitions. Word has length 37 [2025-02-05 14:59:35,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:59:35,182 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 235 transitions. [2025-02-05 14:59:35,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 14:59:35,182 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 235 transitions. [2025-02-05 14:59:35,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-02-05 14:59:35,183 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:59:35,183 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:59:35,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-05 14:59:35,183 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:59:35,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:59:35,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1012348037, now seen corresponding path program 1 times [2025-02-05 14:59:35,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:59:35,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119643160] [2025-02-05 14:59:35,184 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:59:35,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:59:35,186 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-02-05 14:59:35,196 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-02-05 14:59:35,197 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:59:35,197 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 14:59:35,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [899425158] [2025-02-05 14:59:35,199 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:59:35,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:59:35,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:59:35,201 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:59:35,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-05 14:59:35,233 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-02-05 14:59:35,246 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-02-05 14:59:35,247 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:59:35,247 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:59:35,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-02-05 14:59:35,253 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:59:35,699 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-05 14:59:35,699 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:59:36,046 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-05 14:59:36,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:59:36,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119643160] [2025-02-05 14:59:36,047 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 14:59:36,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899425158] [2025-02-05 14:59:36,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899425158] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:59:36,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 14:59:36,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2025-02-05 14:59:36,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249786649] [2025-02-05 14:59:36,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 14:59:36,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-05 14:59:36,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:59:36,048 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-05 14:59:36,048 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2025-02-05 14:59:36,048 INFO L87 Difference]: Start difference. First operand 163 states and 235 transitions. Second operand has 23 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-02-05 14:59:37,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:59:37,814 INFO L93 Difference]: Finished difference Result 442 states and 660 transitions. [2025-02-05 14:59:37,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-02-05 14:59:37,815 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 49 [2025-02-05 14:59:37,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:59:37,820 INFO L225 Difference]: With dead ends: 442 [2025-02-05 14:59:37,820 INFO L226 Difference]: Without dead ends: 339 [2025-02-05 14:59:37,822 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2025-02-05 14:59:37,822 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 169 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-02-05 14:59:37,823 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 339 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-02-05 14:59:37,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2025-02-05 14:59:37,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 253. [2025-02-05 14:59:37,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 149 states have (on average 1.2080536912751678) internal successors, (180), 156 states have internal predecessors, (180), 91 states have call successors, (91), 12 states have call predecessors, (91), 12 states have return successors, (90), 84 states have call predecessors, (90), 90 states have call successors, (90) [2025-02-05 14:59:37,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 361 transitions. [2025-02-05 14:59:37,925 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 361 transitions. Word has length 49 [2025-02-05 14:59:37,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:59:37,926 INFO L471 AbstractCegarLoop]: Abstraction has 253 states and 361 transitions. [2025-02-05 14:59:37,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-02-05 14:59:37,926 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 361 transitions. [2025-02-05 14:59:37,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-02-05 14:59:37,928 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:59:37,928 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:59:37,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-05 14:59:38,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:59:38,130 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:59:38,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:59:38,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1938866279, now seen corresponding path program 1 times [2025-02-05 14:59:38,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:59:38,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728282579] [2025-02-05 14:59:38,131 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:59:38,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:59:38,135 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-02-05 14:59:38,142 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-02-05 14:59:38,142 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:59:38,143 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 14:59:38,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332429892] [2025-02-05 14:59:38,143 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:59:38,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:59:38,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:59:38,145 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:59:38,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-05 14:59:38,177 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-02-05 14:59:38,192 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-02-05 14:59:38,192 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:59:38,192 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:59:38,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-05 14:59:38,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:59:38,251 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2025-02-05 14:59:38,251 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:59:38,305 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2025-02-05 14:59:38,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:59:38,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728282579] [2025-02-05 14:59:38,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 14:59:38,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332429892] [2025-02-05 14:59:38,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332429892] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-05 14:59:38,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 14:59:38,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2025-02-05 14:59:38,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357370783] [2025-02-05 14:59:38,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:59:38,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 14:59:38,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:59:38,306 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 14:59:38,306 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-02-05 14:59:38,306 INFO L87 Difference]: Start difference. First operand 253 states and 361 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-05 14:59:38,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:59:38,442 INFO L93 Difference]: Finished difference Result 259 states and 366 transitions. [2025-02-05 14:59:38,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 14:59:38,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 59 [2025-02-05 14:59:38,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:59:38,445 INFO L225 Difference]: With dead ends: 259 [2025-02-05 14:59:38,445 INFO L226 Difference]: Without dead ends: 257 [2025-02-05 14:59:38,445 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-02-05 14:59:38,446 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 4 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:59:38,446 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 107 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:59:38,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2025-02-05 14:59:38,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2025-02-05 14:59:38,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 152 states have (on average 1.2039473684210527) internal successors, (183), 159 states have internal predecessors, (183), 91 states have call successors, (91), 13 states have call predecessors, (91), 13 states have return successors, (90), 84 states have call predecessors, (90), 90 states have call successors, (90) [2025-02-05 14:59:38,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 364 transitions. [2025-02-05 14:59:38,555 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 364 transitions. Word has length 59 [2025-02-05 14:59:38,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:59:38,555 INFO L471 AbstractCegarLoop]: Abstraction has 257 states and 364 transitions. [2025-02-05 14:59:38,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-05 14:59:38,555 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 364 transitions. [2025-02-05 14:59:38,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-02-05 14:59:38,556 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:59:38,556 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:59:38,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-05 14:59:38,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-05 14:59:38,760 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:59:38,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:59:38,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1126757852, now seen corresponding path program 1 times [2025-02-05 14:59:38,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:59:38,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514412454] [2025-02-05 14:59:38,760 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:59:38,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:59:38,763 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-02-05 14:59:38,770 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-02-05 14:59:38,770 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:59:38,770 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 14:59:38,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1517008422] [2025-02-05 14:59:38,771 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:59:38,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:59:38,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:59:38,776 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:59:38,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-05 14:59:38,800 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-02-05 14:59:38,814 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-02-05 14:59:38,814 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:59:38,814 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:59:38,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-02-05 14:59:38,816 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:59:39,277 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-05 14:59:39,278 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:59:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-05 14:59:39,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:59:39,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514412454] [2025-02-05 14:59:39,628 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 14:59:39,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517008422] [2025-02-05 14:59:39,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517008422] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:59:39,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 14:59:39,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2025-02-05 14:59:39,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726343753] [2025-02-05 14:59:39,629 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 14:59:39,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-05 14:59:39,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:59:39,630 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-05 14:59:39,630 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2025-02-05 14:59:39,630 INFO L87 Difference]: Start difference. First operand 257 states and 364 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 22 states have internal predecessors, (58), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-02-05 14:59:41,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:59:41,744 INFO L93 Difference]: Finished difference Result 355 states and 510 transitions. [2025-02-05 14:59:41,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-05 14:59:41,745 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 22 states have internal predecessors, (58), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 57 [2025-02-05 14:59:41,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:59:41,746 INFO L225 Difference]: With dead ends: 355 [2025-02-05 14:59:41,747 INFO L226 Difference]: Without dead ends: 353 [2025-02-05 14:59:41,747 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=341, Invalid=1465, Unknown=0, NotChecked=0, Total=1806 [2025-02-05 14:59:41,747 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 192 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:59:41,747 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 611 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-02-05 14:59:41,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2025-02-05 14:59:41,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 298. [2025-02-05 14:59:41,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 175 states have (on average 1.2) internal successors, (210), 184 states have internal predecessors, (210), 107 states have call successors, (107), 15 states have call predecessors, (107), 15 states have return successors, (106), 98 states have call predecessors, (106), 106 states have call successors, (106) [2025-02-05 14:59:41,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 423 transitions. [2025-02-05 14:59:41,864 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 423 transitions. Word has length 57 [2025-02-05 14:59:41,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:59:41,864 INFO L471 AbstractCegarLoop]: Abstraction has 298 states and 423 transitions. [2025-02-05 14:59:41,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 22 states have internal predecessors, (58), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-02-05 14:59:41,864 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 423 transitions. [2025-02-05 14:59:41,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-02-05 14:59:41,864 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:59:41,865 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:59:41,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-05 14:59:42,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-02-05 14:59:42,066 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:59:42,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:59:42,066 INFO L85 PathProgramCache]: Analyzing trace with hash -238317530, now seen corresponding path program 2 times [2025-02-05 14:59:42,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:59:42,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181460786] [2025-02-05 14:59:42,066 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:59:42,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:59:42,069 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 62 statements into 2 equivalence classes. [2025-02-05 14:59:42,074 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 62 of 62 statements. [2025-02-05 14:59:42,074 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:59:42,074 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:59:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2025-02-05 14:59:42,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:59:42,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181460786] [2025-02-05 14:59:42,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181460786] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:59:42,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 14:59:42,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 14:59:42,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737313664] [2025-02-05 14:59:42,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:59:42,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 14:59:42,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:59:42,123 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 14:59:42,123 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 14:59:42,123 INFO L87 Difference]: Start difference. First operand 298 states and 423 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2025-02-05 14:59:42,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:59:42,258 INFO L93 Difference]: Finished difference Result 524 states and 751 transitions. [2025-02-05 14:59:42,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 14:59:42,259 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2025-02-05 14:59:42,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:59:42,261 INFO L225 Difference]: With dead ends: 524 [2025-02-05 14:59:42,261 INFO L226 Difference]: Without dead ends: 324 [2025-02-05 14:59:42,262 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-05 14:59:42,262 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:59:42,263 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 101 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:59:42,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2025-02-05 14:59:42,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 315. [2025-02-05 14:59:42,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 192 states have (on average 1.203125) internal successors, (231), 193 states have internal predecessors, (231), 107 states have call successors, (107), 15 states have call predecessors, (107), 15 states have return successors, (106), 106 states have call predecessors, (106), 106 states have call successors, (106) [2025-02-05 14:59:42,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 444 transitions. [2025-02-05 14:59:42,391 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 444 transitions. Word has length 62 [2025-02-05 14:59:42,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:59:42,391 INFO L471 AbstractCegarLoop]: Abstraction has 315 states and 444 transitions. [2025-02-05 14:59:42,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2025-02-05 14:59:42,391 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 444 transitions. [2025-02-05 14:59:42,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-02-05 14:59:42,392 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:59:42,392 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:59:42,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-02-05 14:59:42,392 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:59:42,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:59:42,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1062087757, now seen corresponding path program 3 times [2025-02-05 14:59:42,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:59:42,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936306850] [2025-02-05 14:59:42,393 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:59:42,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:59:42,397 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 62 statements into 6 equivalence classes. [2025-02-05 14:59:42,418 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 62 of 62 statements. [2025-02-05 14:59:42,422 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-05 14:59:42,422 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 14:59:42,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624522883] [2025-02-05 14:59:42,423 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:59:42,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:59:42,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:59:42,427 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:59:42,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-05 14:59:42,448 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 62 statements into 6 equivalence classes. [2025-02-05 14:59:42,465 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 47 of 62 statements. [2025-02-05 14:59:42,465 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 14:59:42,465 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:59:42,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-02-05 14:59:42,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:59:43,061 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-02-05 14:59:43,061 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:59:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-02-05 14:59:43,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:59:43,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936306850] [2025-02-05 14:59:43,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 14:59:43,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624522883] [2025-02-05 14:59:43,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624522883] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:59:43,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 14:59:43,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2025-02-05 14:59:43,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041500006] [2025-02-05 14:59:43,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 14:59:43,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-05 14:59:43,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:59:43,826 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-05 14:59:43,827 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2025-02-05 14:59:43,827 INFO L87 Difference]: Start difference. First operand 315 states and 444 transitions. Second operand has 27 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2025-02-05 14:59:47,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:59:47,086 INFO L93 Difference]: Finished difference Result 418 states and 586 transitions. [2025-02-05 14:59:47,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-02-05 14:59:47,087 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 62 [2025-02-05 14:59:47,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:59:47,089 INFO L225 Difference]: With dead ends: 418 [2025-02-05 14:59:47,090 INFO L226 Difference]: Without dead ends: 416 [2025-02-05 14:59:47,091 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=639, Invalid=2441, Unknown=0, NotChecked=0, Total=3080 [2025-02-05 14:59:47,091 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 266 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2025-02-05 14:59:47,091 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 429 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2025-02-05 14:59:47,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2025-02-05 14:59:47,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 355. [2025-02-05 14:59:47,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 221 states have (on average 1.1900452488687783) internal successors, (263), 222 states have internal predecessors, (263), 115 states have call successors, (115), 18 states have call predecessors, (115), 18 states have return successors, (114), 114 states have call predecessors, (114), 114 states have call successors, (114) [2025-02-05 14:59:47,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 492 transitions. [2025-02-05 14:59:47,243 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 492 transitions. Word has length 62 [2025-02-05 14:59:47,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:59:47,243 INFO L471 AbstractCegarLoop]: Abstraction has 355 states and 492 transitions. [2025-02-05 14:59:47,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2025-02-05 14:59:47,244 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 492 transitions. [2025-02-05 14:59:47,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2025-02-05 14:59:47,244 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:59:47,244 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:59:47,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-05 14:59:47,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:59:47,445 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:59:47,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:59:47,446 INFO L85 PathProgramCache]: Analyzing trace with hash -2008568314, now seen corresponding path program 1 times [2025-02-05 14:59:47,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:59:47,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977769236] [2025-02-05 14:59:47,446 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:59:47,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:59:47,449 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 76 statements into 1 equivalence classes. [2025-02-05 14:59:47,462 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 76 of 76 statements. [2025-02-05 14:59:47,462 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:59:47,462 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 14:59:47,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [988586910] [2025-02-05 14:59:47,463 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:59:47,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:59:47,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:59:47,464 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:59:47,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-05 14:59:47,488 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 76 statements into 1 equivalence classes. [2025-02-05 14:59:47,506 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 76 of 76 statements. [2025-02-05 14:59:47,506 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:59:47,506 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:59:47,507 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 77 conjuncts are in the unsatisfiable core [2025-02-05 14:59:47,509 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:59:48,284 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2025-02-05 14:59:48,285 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:59:49,083 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2025-02-05 14:59:49,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:59:49,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977769236] [2025-02-05 14:59:49,084 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 14:59:49,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988586910] [2025-02-05 14:59:49,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988586910] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:59:49,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 14:59:49,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2025-02-05 14:59:49,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309570907] [2025-02-05 14:59:49,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 14:59:49,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-02-05 14:59:49,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:59:49,085 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-02-05 14:59:49,085 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2025-02-05 14:59:49,085 INFO L87 Difference]: Start difference. First operand 355 states and 492 transitions. Second operand has 33 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2025-02-05 14:59:52,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-05 14:59:56,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:59:56,539 INFO L93 Difference]: Finished difference Result 544 states and 773 transitions. [2025-02-05 14:59:56,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2025-02-05 14:59:56,539 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 76 [2025-02-05 14:59:56,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:59:56,542 INFO L225 Difference]: With dead ends: 544 [2025-02-05 14:59:56,542 INFO L226 Difference]: Without dead ends: 540 [2025-02-05 14:59:56,545 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1200, Invalid=4962, Unknown=0, NotChecked=0, Total=6162 [2025-02-05 14:59:56,546 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 251 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 1532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2025-02-05 14:59:56,546 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 827 Invalid, 1532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 1280 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2025-02-05 14:59:56,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2025-02-05 14:59:56,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 500. [2025-02-05 14:59:56,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 310 states have (on average 1.2096774193548387) internal successors, (375), 311 states have internal predecessors, (375), 167 states have call successors, (167), 22 states have call predecessors, (167), 22 states have return successors, (166), 166 states have call predecessors, (166), 166 states have call successors, (166) [2025-02-05 14:59:56,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 708 transitions. [2025-02-05 14:59:56,880 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 708 transitions. Word has length 76 [2025-02-05 14:59:56,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:59:56,881 INFO L471 AbstractCegarLoop]: Abstraction has 500 states and 708 transitions. [2025-02-05 14:59:56,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2025-02-05 14:59:56,881 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 708 transitions. [2025-02-05 14:59:56,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2025-02-05 14:59:56,882 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:59:56,882 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:59:56,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-02-05 14:59:57,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:59:57,082 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:59:57,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:59:57,083 INFO L85 PathProgramCache]: Analyzing trace with hash 428354209, now seen corresponding path program 1 times [2025-02-05 14:59:57,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:59:57,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752875029] [2025-02-05 14:59:57,083 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:59:57,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:59:57,086 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 79 statements into 1 equivalence classes. [2025-02-05 14:59:57,091 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 79 of 79 statements. [2025-02-05 14:59:57,091 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:59:57,092 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 14:59:57,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1458486791] [2025-02-05 14:59:57,092 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:59:57,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:59:57,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:59:57,098 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:59:57,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-05 14:59:57,121 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 79 statements into 1 equivalence classes. [2025-02-05 14:59:57,135 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 79 of 79 statements. [2025-02-05 14:59:57,135 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:59:57,135 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:59:57,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-02-05 14:59:57,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:59:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2025-02-05 14:59:57,349 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:59:57,572 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2025-02-05 14:59:57,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:59:57,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752875029] [2025-02-05 14:59:57,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 14:59:57,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458486791] [2025-02-05 14:59:57,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458486791] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:59:57,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 14:59:57,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2025-02-05 14:59:57,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398776725] [2025-02-05 14:59:57,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 14:59:57,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-05 14:59:57,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:59:57,573 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-05 14:59:57,573 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2025-02-05 14:59:57,574 INFO L87 Difference]: Start difference. First operand 500 states and 708 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2025-02-05 14:59:59,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:59:59,074 INFO L93 Difference]: Finished difference Result 991 states and 1520 transitions. [2025-02-05 14:59:59,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-05 14:59:59,074 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 79 [2025-02-05 14:59:59,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:59:59,079 INFO L225 Difference]: With dead ends: 991 [2025-02-05 14:59:59,079 INFO L226 Difference]: Without dead ends: 989 [2025-02-05 14:59:59,079 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2025-02-05 14:59:59,080 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 129 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 14:59:59,080 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 357 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 14:59:59,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2025-02-05 14:59:59,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 931. [2025-02-05 14:59:59,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 484 states have (on average 1.287190082644628) internal successors, (623), 485 states have internal predecessors, (623), 419 states have call successors, (419), 27 states have call predecessors, (419), 27 states have return successors, (418), 418 states have call predecessors, (418), 418 states have call successors, (418) [2025-02-05 14:59:59,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1460 transitions. [2025-02-05 14:59:59,807 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1460 transitions. Word has length 79 [2025-02-05 14:59:59,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:59:59,807 INFO L471 AbstractCegarLoop]: Abstraction has 931 states and 1460 transitions. [2025-02-05 14:59:59,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2025-02-05 14:59:59,807 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1460 transitions. [2025-02-05 14:59:59,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2025-02-05 14:59:59,814 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:59:59,815 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:59:59,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-02-05 15:00:00,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-05 15:00:00,015 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:00:00,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:00:00,016 INFO L85 PathProgramCache]: Analyzing trace with hash 235529411, now seen corresponding path program 4 times [2025-02-05 15:00:00,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:00:00,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869314970] [2025-02-05 15:00:00,016 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:00:00,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:00:00,021 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 82 statements into 2 equivalence classes. [2025-02-05 15:00:00,050 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 82 of 82 statements. [2025-02-05 15:00:00,051 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 15:00:00,051 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:00:00,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [715435591] [2025-02-05 15:00:00,051 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:00:00,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:00:00,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:00:00,061 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:00:00,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-05 15:00:00,090 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 82 statements into 2 equivalence classes. [2025-02-05 15:00:00,109 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 80 of 82 statements. [2025-02-05 15:00:00,109 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:00:00,109 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:00:00,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-02-05 15:00:00,112 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:00:00,933 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2025-02-05 15:00:00,933 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:00:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 55 proven. 9 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2025-02-05 15:00:01,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:00:01,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869314970] [2025-02-05 15:00:01,114 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:00:01,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715435591] [2025-02-05 15:00:01,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715435591] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:00:01,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:00:01,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 21 [2025-02-05 15:00:01,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150031146] [2025-02-05 15:00:01,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:00:01,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-05 15:00:01,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:00:01,118 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-05 15:00:01,118 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2025-02-05 15:00:01,119 INFO L87 Difference]: Start difference. First operand 931 states and 1460 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 18 states have internal predecessors, (62), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2025-02-05 15:00:04,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:00:04,197 INFO L93 Difference]: Finished difference Result 1050 states and 1642 transitions. [2025-02-05 15:00:04,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-05 15:00:04,202 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 18 states have internal predecessors, (62), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 82 [2025-02-05 15:00:04,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:00:04,206 INFO L225 Difference]: With dead ends: 1050 [2025-02-05 15:00:04,206 INFO L226 Difference]: Without dead ends: 1048 [2025-02-05 15:00:04,207 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2025-02-05 15:00:04,208 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 76 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:00:04,208 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 427 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-02-05 15:00:04,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2025-02-05 15:00:04,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 951. [2025-02-05 15:00:04,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 499 states have (on average 1.2785571142284569) internal successors, (638), 500 states have internal predecessors, (638), 419 states have call successors, (419), 32 states have call predecessors, (419), 32 states have return successors, (418), 418 states have call predecessors, (418), 418 states have call successors, (418) [2025-02-05 15:00:04,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1475 transitions. [2025-02-05 15:00:04,923 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 1475 transitions. Word has length 82 [2025-02-05 15:00:04,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:00:04,923 INFO L471 AbstractCegarLoop]: Abstraction has 951 states and 1475 transitions. [2025-02-05 15:00:04,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 18 states have internal predecessors, (62), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2025-02-05 15:00:04,923 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 1475 transitions. [2025-02-05 15:00:04,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2025-02-05 15:00:04,925 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:00:04,926 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:00:04,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-05 15:00:05,130 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-05 15:00:05,130 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:00:05,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:00:05,131 INFO L85 PathProgramCache]: Analyzing trace with hash 2091660036, now seen corresponding path program 2 times [2025-02-05 15:00:05,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:00:05,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588402387] [2025-02-05 15:00:05,131 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:00:05,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:00:05,134 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 84 statements into 2 equivalence classes. [2025-02-05 15:00:05,141 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 84 of 84 statements. [2025-02-05 15:00:05,141 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:00:05,141 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:00:05,318 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2025-02-05 15:00:05,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:00:05,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588402387] [2025-02-05 15:00:05,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588402387] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:00:05,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888083921] [2025-02-05 15:00:05,318 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:00:05,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:00:05,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:00:05,321 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:00:05,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-05 15:00:05,346 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 84 statements into 2 equivalence classes. [2025-02-05 15:00:05,365 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 84 of 84 statements. [2025-02-05 15:00:05,365 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:00:05,365 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:00:05,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-05 15:00:05,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:00:05,426 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2025-02-05 15:00:05,427 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:00:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2025-02-05 15:00:05,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888083921] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:00:05,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:00:05,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2025-02-05 15:00:05,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123264322] [2025-02-05 15:00:05,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:00:05,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-05 15:00:05,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:00:05,517 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-05 15:00:05,517 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2025-02-05 15:00:05,517 INFO L87 Difference]: Start difference. First operand 951 states and 1475 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2025-02-05 15:00:06,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:00:06,912 INFO L93 Difference]: Finished difference Result 1192 states and 1868 transitions. [2025-02-05 15:00:06,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-05 15:00:06,912 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 84 [2025-02-05 15:00:06,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:00:06,917 INFO L225 Difference]: With dead ends: 1192 [2025-02-05 15:00:06,917 INFO L226 Difference]: Without dead ends: 1185 [2025-02-05 15:00:06,918 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 165 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2025-02-05 15:00:06,918 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 80 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:00:06,918 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 384 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:00:06,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2025-02-05 15:00:07,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 806. [2025-02-05 15:00:07,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 419 states have (on average 1.2768496420047732) internal successors, (535), 420 states have internal predecessors, (535), 355 states have call successors, (355), 31 states have call predecessors, (355), 31 states have return successors, (354), 354 states have call predecessors, (354), 354 states have call successors, (354) [2025-02-05 15:00:07,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1244 transitions. [2025-02-05 15:00:07,604 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1244 transitions. Word has length 84 [2025-02-05 15:00:07,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:00:07,604 INFO L471 AbstractCegarLoop]: Abstraction has 806 states and 1244 transitions. [2025-02-05 15:00:07,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2025-02-05 15:00:07,604 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1244 transitions. [2025-02-05 15:00:07,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2025-02-05 15:00:07,605 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:00:07,605 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:00:07,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-02-05 15:00:07,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:00:07,806 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:00:07,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:00:07,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1198271423, now seen corresponding path program 2 times [2025-02-05 15:00:07,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:00:07,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487463406] [2025-02-05 15:00:07,807 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:00:07,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:00:07,810 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 96 statements into 2 equivalence classes. [2025-02-05 15:00:07,817 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 96 of 96 statements. [2025-02-05 15:00:07,817 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:00:07,817 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:00:07,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562443376] [2025-02-05 15:00:07,818 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:00:07,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:00:07,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:00:07,820 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:00:07,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-05 15:00:07,864 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 96 statements into 2 equivalence classes. [2025-02-05 15:00:07,896 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 96 of 96 statements. [2025-02-05 15:00:07,896 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:00:07,896 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:00:07,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-02-05 15:00:07,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:00:08,669 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2025-02-05 15:00:08,669 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:00:09,194 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2025-02-05 15:00:09,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:00:09,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487463406] [2025-02-05 15:00:09,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:00:09,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562443376] [2025-02-05 15:00:09,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562443376] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:00:09,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:00:09,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2025-02-05 15:00:09,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107731775] [2025-02-05 15:00:09,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:00:09,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-05 15:00:09,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:00:09,197 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-05 15:00:09,197 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2025-02-05 15:00:09,197 INFO L87 Difference]: Start difference. First operand 806 states and 1244 transitions. Second operand has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) [2025-02-05 15:00:18,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:00:18,175 INFO L93 Difference]: Finished difference Result 1472 states and 2266 transitions. [2025-02-05 15:00:18,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2025-02-05 15:00:18,175 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) Word has length 96 [2025-02-05 15:00:18,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:00:18,181 INFO L225 Difference]: With dead ends: 1472 [2025-02-05 15:00:18,184 INFO L226 Difference]: Without dead ends: 1137 [2025-02-05 15:00:18,187 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1352, Invalid=6130, Unknown=0, NotChecked=0, Total=7482 [2025-02-05 15:00:18,192 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 270 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2025-02-05 15:00:18,192 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 597 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2025-02-05 15:00:18,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2025-02-05 15:00:19,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 960. [2025-02-05 15:00:19,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 499 states have (on average 1.2745490981963927) internal successors, (636), 500 states have internal predecessors, (636), 423 states have call successors, (423), 37 states have call predecessors, (423), 37 states have return successors, (422), 422 states have call predecessors, (422), 422 states have call successors, (422) [2025-02-05 15:00:19,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1481 transitions. [2025-02-05 15:00:19,190 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1481 transitions. Word has length 96 [2025-02-05 15:00:19,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:00:19,190 INFO L471 AbstractCegarLoop]: Abstraction has 960 states and 1481 transitions. [2025-02-05 15:00:19,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) [2025-02-05 15:00:19,191 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1481 transitions. [2025-02-05 15:00:19,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2025-02-05 15:00:19,192 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:00:19,192 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:00:19,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-05 15:00:19,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:00:19,393 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:00:19,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:00:19,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1527358711, now seen corresponding path program 1 times [2025-02-05 15:00:19,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:00:19,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949214396] [2025-02-05 15:00:19,393 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:00:19,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:00:19,397 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 109 statements into 1 equivalence classes. [2025-02-05 15:00:19,409 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 109 of 109 statements. [2025-02-05 15:00:19,410 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:00:19,410 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:00:19,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251263200] [2025-02-05 15:00:19,411 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:00:19,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:00:19,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:00:19,416 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:00:19,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-05 15:00:19,441 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 109 statements into 1 equivalence classes. [2025-02-05 15:00:19,468 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 109 of 109 statements. [2025-02-05 15:00:19,468 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:00:19,468 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:00:19,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 75 conjuncts are in the unsatisfiable core [2025-02-05 15:00:19,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:00:21,123 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 61 proven. 59 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2025-02-05 15:00:21,123 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:00:21,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:00:21,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949214396] [2025-02-05 15:00:21,968 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:00:21,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251263200] [2025-02-05 15:00:21,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251263200] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:00:21,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:00:21,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2025-02-05 15:00:21,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890635971] [2025-02-05 15:00:21,968 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 15:00:21,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-05 15:00:21,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:00:21,969 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-05 15:00:21,969 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2025-02-05 15:00:21,969 INFO L87 Difference]: Start difference. First operand 960 states and 1481 transitions. Second operand has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 20 states have internal predecessors, (45), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2025-02-05 15:00:24,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:00:24,794 INFO L93 Difference]: Finished difference Result 1112 states and 1700 transitions. [2025-02-05 15:00:24,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-05 15:00:24,794 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 20 states have internal predecessors, (45), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 109 [2025-02-05 15:00:24,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:00:24,799 INFO L225 Difference]: With dead ends: 1112 [2025-02-05 15:00:24,799 INFO L226 Difference]: Without dead ends: 1110 [2025-02-05 15:00:24,800 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=219, Invalid=1503, Unknown=0, NotChecked=0, Total=1722 [2025-02-05 15:00:24,800 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 88 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-02-05 15:00:24,800 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 818 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-02-05 15:00:24,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2025-02-05 15:00:25,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 1082. [2025-02-05 15:00:25,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 559 states have (on average 1.2754919499105546) internal successors, (713), 560 states have internal predecessors, (713), 479 states have call successors, (479), 43 states have call predecessors, (479), 43 states have return successors, (478), 478 states have call predecessors, (478), 478 states have call successors, (478) [2025-02-05 15:00:25,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 1670 transitions. [2025-02-05 15:00:25,794 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 1670 transitions. Word has length 109 [2025-02-05 15:00:25,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:00:25,794 INFO L471 AbstractCegarLoop]: Abstraction has 1082 states and 1670 transitions. [2025-02-05 15:00:25,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 20 states have internal predecessors, (45), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2025-02-05 15:00:25,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 1670 transitions. [2025-02-05 15:00:25,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2025-02-05 15:00:25,796 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:00:25,796 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:00:25,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-02-05 15:00:26,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:00:26,000 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:00:26,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:00:26,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1846339439, now seen corresponding path program 2 times [2025-02-05 15:00:26,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:00:26,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288558253] [2025-02-05 15:00:26,000 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:00:26,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:00:26,004 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 114 statements into 2 equivalence classes. [2025-02-05 15:00:26,024 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 114 of 114 statements. [2025-02-05 15:00:26,024 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:00:26,024 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:00:26,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14915671] [2025-02-05 15:00:26,025 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:00:26,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:00:26,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:00:26,027 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:00:26,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-05 15:00:26,068 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 114 statements into 2 equivalence classes. [2025-02-05 15:00:26,096 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 114 of 114 statements. [2025-02-05 15:00:26,096 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:00:26,096 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:00:26,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 95 conjuncts are in the unsatisfiable core [2025-02-05 15:00:26,109 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:00:27,379 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 52 proven. 86 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2025-02-05 15:00:27,379 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:00:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 68 proven. 67 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2025-02-05 15:00:29,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:00:29,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288558253] [2025-02-05 15:00:29,390 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:00:29,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14915671] [2025-02-05 15:00:29,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14915671] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:00:29,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:00:29,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21] total 43 [2025-02-05 15:00:29,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153714790] [2025-02-05 15:00:29,390 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:00:29,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-02-05 15:00:29,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:00:29,391 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-02-05 15:00:29,391 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1486, Unknown=0, NotChecked=0, Total=1806 [2025-02-05 15:00:29,392 INFO L87 Difference]: Start difference. First operand 1082 states and 1670 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 41 states have internal predecessors, (87), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 11 states have call successors, (30) [2025-02-05 15:00:40,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.84s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-05 15:00:42,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-05 15:00:47,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.68s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-05 15:00:53,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:00:53,167 INFO L93 Difference]: Finished difference Result 1395 states and 2132 transitions. [2025-02-05 15:00:53,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2025-02-05 15:00:53,167 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 41 states have internal predecessors, (87), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 11 states have call successors, (30) Word has length 114 [2025-02-05 15:00:53,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:00:53,173 INFO L225 Difference]: With dead ends: 1395 [2025-02-05 15:00:53,173 INFO L226 Difference]: Without dead ends: 1393 [2025-02-05 15:00:53,176 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2714 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=2034, Invalid=8678, Unknown=0, NotChecked=0, Total=10712 [2025-02-05 15:00:53,180 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 253 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 1880 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 2169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 1880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:00:53,180 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 1063 Invalid, 2169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 1880 Invalid, 0 Unknown, 0 Unchecked, 14.1s Time] [2025-02-05 15:00:53,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2025-02-05 15:00:54,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 1252. [2025-02-05 15:00:54,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 658 states have (on average 1.262917933130699) internal successors, (831), 663 states have internal predecessors, (831), 543 states have call successors, (543), 50 states have call predecessors, (543), 50 states have return successors, (542), 538 states have call predecessors, (542), 542 states have call successors, (542) [2025-02-05 15:00:54,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 1916 transitions. [2025-02-05 15:00:54,544 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 1916 transitions. Word has length 114 [2025-02-05 15:00:54,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:00:54,545 INFO L471 AbstractCegarLoop]: Abstraction has 1252 states and 1916 transitions. [2025-02-05 15:00:54,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 41 states have internal predecessors, (87), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 11 states have call successors, (30) [2025-02-05 15:00:54,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 1916 transitions. [2025-02-05 15:00:54,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2025-02-05 15:00:54,547 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:00:54,547 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:00:54,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-02-05 15:00:54,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:00:54,751 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:00:54,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:00:54,751 INFO L85 PathProgramCache]: Analyzing trace with hash 788196820, now seen corresponding path program 3 times [2025-02-05 15:00:54,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:00:54,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686537201] [2025-02-05 15:00:54,751 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:00:54,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:00:54,755 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 123 statements into 9 equivalence classes. [2025-02-05 15:00:54,773 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 123 of 123 statements. [2025-02-05 15:00:54,774 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-02-05 15:00:54,774 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:00:54,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729147012] [2025-02-05 15:00:54,775 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:00:54,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:00:54,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:00:54,776 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:00:54,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-05 15:00:54,805 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 123 statements into 9 equivalence classes. [2025-02-05 15:00:54,833 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 71 of 123 statements. [2025-02-05 15:00:54,833 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-05 15:00:54,833 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:00:54,837 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 79 conjuncts are in the unsatisfiable core [2025-02-05 15:00:54,839 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:00:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 104 proven. 55 refuted. 0 times theorem prover too weak. 413 trivial. 0 not checked. [2025-02-05 15:00:56,435 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:01:01,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:01:01,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686537201] [2025-02-05 15:01:01,296 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:01:01,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729147012] [2025-02-05 15:01:01,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729147012] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:01:01,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:01:01,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2025-02-05 15:01:01,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665519586] [2025-02-05 15:01:01,297 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 15:01:01,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-05 15:01:01,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:01:01,298 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-05 15:01:01,299 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1014, Unknown=1, NotChecked=0, Total=1190 [2025-02-05 15:01:01,299 INFO L87 Difference]: Start difference. First operand 1252 states and 1916 transitions. Second operand has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2025-02-05 15:01:03,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:01:03,925 INFO L93 Difference]: Finished difference Result 1443 states and 2206 transitions. [2025-02-05 15:01:03,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-05 15:01:03,925 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 123 [2025-02-05 15:01:03,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:01:03,931 INFO L225 Difference]: With dead ends: 1443 [2025-02-05 15:01:03,931 INFO L226 Difference]: Without dead ends: 1436 [2025-02-05 15:01:03,931 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=244, Invalid=1315, Unknown=1, NotChecked=0, Total=1560 [2025-02-05 15:01:03,932 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 66 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-02-05 15:01:03,932 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 460 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 695 Invalid, 1 Unknown, 0 Unchecked, 0.8s Time] [2025-02-05 15:01:03,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2025-02-05 15:01:05,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1388. [2025-02-05 15:01:05,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 725 states have (on average 1.2662068965517241) internal successors, (918), 730 states have internal predecessors, (918), 607 states have call successors, (607), 55 states have call predecessors, (607), 55 states have return successors, (606), 602 states have call predecessors, (606), 606 states have call successors, (606) [2025-02-05 15:01:05,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 2131 transitions. [2025-02-05 15:01:05,508 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 2131 transitions. Word has length 123 [2025-02-05 15:01:05,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:01:05,508 INFO L471 AbstractCegarLoop]: Abstraction has 1388 states and 2131 transitions. [2025-02-05 15:01:05,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2025-02-05 15:01:05,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 2131 transitions. [2025-02-05 15:01:05,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2025-02-05 15:01:05,513 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:01:05,513 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:01:05,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-02-05 15:01:05,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:01:05,718 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:01:05,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:01:05,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1378444226, now seen corresponding path program 4 times [2025-02-05 15:01:05,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:01:05,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746885141] [2025-02-05 15:01:05,722 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:01:05,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:01:05,727 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 123 statements into 2 equivalence classes. [2025-02-05 15:01:05,749 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 123 of 123 statements. [2025-02-05 15:01:05,752 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 15:01:05,752 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:01:05,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [866971875] [2025-02-05 15:01:05,753 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:01:05,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:01:05,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:01:05,754 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:01:05,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-02-05 15:01:05,784 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 123 statements into 2 equivalence classes. [2025-02-05 15:01:05,815 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 121 of 123 statements. [2025-02-05 15:01:05,816 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:01:05,816 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:01:05,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 79 conjuncts are in the unsatisfiable core [2025-02-05 15:01:05,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:01:06,918 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 32 proven. 59 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2025-02-05 15:01:06,919 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:01:08,089 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 32 proven. 56 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2025-02-05 15:01:08,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:01:08,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746885141] [2025-02-05 15:01:08,089 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:01:08,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866971875] [2025-02-05 15:01:08,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866971875] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:01:08,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:01:08,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2025-02-05 15:01:08,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592511938] [2025-02-05 15:01:08,090 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:01:08,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-02-05 15:01:08,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:01:08,090 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-02-05 15:01:08,091 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2025-02-05 15:01:08,092 INFO L87 Difference]: Start difference. First operand 1388 states and 2131 transitions. Second operand has 35 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 12 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 10 states have call predecessors, (36), 10 states have call successors, (36)