./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d 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-scaling/egcd-ll_unwindbound100.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 f5161832faa85efa7698287d22f9a23de4fa8b958c1b2d2c225d3d8c999a24ce --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 20:32:57,788 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 20:32:57,842 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 20:32:57,846 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 20:32:57,848 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 20:32:57,870 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 20:32:57,870 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 20:32:57,871 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 20:32:57,871 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 20:32:57,871 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 20:32:57,871 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 20:32:57,871 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 20:32:57,872 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 20:32:57,872 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 20:32:57,872 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 20:32:57,873 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 20:32:57,873 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 20:32:57,873 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 20:32:57,873 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 20:32:57,873 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 20:32:57,873 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 20:32:57,873 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 20:32:57,873 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 20:32:57,873 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 20:32:57,874 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 20:32:57,874 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 20:32:57,874 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 20:32:57,874 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 20:32:57,874 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 20:32:57,874 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 20:32:57,874 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 20:32:57,874 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 20:32:57,874 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 20:32:57,874 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 20:32:57,875 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 20:32:57,875 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 20:32:57,875 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 20:32:57,875 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 20:32:57,875 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 20:32:57,875 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 20:32:57,875 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 20:32:57,875 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 20:32:57,875 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 20:32:57,875 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 -> f5161832faa85efa7698287d22f9a23de4fa8b958c1b2d2c225d3d8c999a24ce [2025-02-07 20:32:58,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 20:32:58,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 20:32:58,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 20:32:58,074 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 20:32:58,074 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 20:32:58,075 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound100.c [2025-02-07 20:32:59,169 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/72ab8aae2/976ac5e267f24ca2bc24e4a5df146a31/FLAGdf5ed6c0a [2025-02-07 20:32:59,384 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 20:32:59,386 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound100.c [2025-02-07 20:32:59,394 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/72ab8aae2/976ac5e267f24ca2bc24e4a5df146a31/FLAGdf5ed6c0a [2025-02-07 20:32:59,403 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/72ab8aae2/976ac5e267f24ca2bc24e4a5df146a31 [2025-02-07 20:32:59,405 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 20:32:59,406 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 20:32:59,407 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 20:32:59,407 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 20:32:59,409 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 20:32:59,410 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 08:32:59" (1/1) ... [2025-02-07 20:32:59,410 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16473219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:32:59, skipping insertion in model container [2025-02-07 20:32:59,410 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 08:32:59" (1/1) ... [2025-02-07 20:32:59,420 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 20:32:59,507 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-scaling/egcd-ll_unwindbound100.c[489,502] [2025-02-07 20:32:59,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 20:32:59,530 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 20:32:59,538 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-scaling/egcd-ll_unwindbound100.c[489,502] [2025-02-07 20:32:59,545 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 20:32:59,558 INFO L204 MainTranslator]: Completed translation [2025-02-07 20:32:59,559 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:32:59 WrapperNode [2025-02-07 20:32:59,560 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 20:32:59,561 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 20:32:59,561 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 20:32:59,561 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 20:32:59,566 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:32:59" (1/1) ... [2025-02-07 20:32:59,571 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:32:59" (1/1) ... [2025-02-07 20:32:59,582 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 59 [2025-02-07 20:32:59,583 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 20:32:59,583 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 20:32:59,584 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 20:32:59,584 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 20:32:59,589 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:32:59" (1/1) ... [2025-02-07 20:32:59,590 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:32:59" (1/1) ... [2025-02-07 20:32:59,591 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:32:59" (1/1) ... [2025-02-07 20:32:59,602 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]. [2025-02-07 20:32:59,603 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:32:59" (1/1) ... [2025-02-07 20:32:59,603 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:32:59" (1/1) ... [2025-02-07 20:32:59,604 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:32:59" (1/1) ... [2025-02-07 20:32:59,608 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:32:59" (1/1) ... [2025-02-07 20:32:59,609 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:32:59" (1/1) ... [2025-02-07 20:32:59,609 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:32:59" (1/1) ... [2025-02-07 20:32:59,610 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 20:32:59,611 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 20:32:59,611 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 20:32:59,611 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 20:32:59,611 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:32:59" (1/1) ... [2025-02-07 20:32:59,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 20:32:59,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:32:59,633 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) [2025-02-07 20:32:59,637 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 [2025-02-07 20:32:59,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 20:32:59,650 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-02-07 20:32:59,650 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-02-07 20:32:59,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 20:32:59,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 20:32:59,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 20:32:59,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-07 20:32:59,650 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-07 20:32:59,684 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 20:32:59,685 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 20:32:59,819 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2025-02-07 20:32:59,819 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 20:32:59,825 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 20:32:59,827 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 20:32:59,827 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:32:59 BoogieIcfgContainer [2025-02-07 20:32:59,827 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 20:32:59,829 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 20:32:59,829 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 20:32:59,832 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 20:32:59,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 08:32:59" (1/3) ... [2025-02-07 20:32:59,833 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1db0bf6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 08:32:59, skipping insertion in model container [2025-02-07 20:32:59,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:32:59" (2/3) ... [2025-02-07 20:32:59,834 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1db0bf6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 08:32:59, skipping insertion in model container [2025-02-07 20:32:59,834 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:32:59" (3/3) ... [2025-02-07 20:32:59,834 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound100.c [2025-02-07 20:32:59,845 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 20:32:59,846 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd-ll_unwindbound100.c that has 3 procedures, 28 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-02-07 20:32:59,880 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 20:32:59,888 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;@5851ed0a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 20:32:59,888 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 20:32:59,891 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-02-07 20:32:59,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-02-07 20:32:59,895 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:32:59,896 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:32:59,896 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:32:59,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:32:59,900 INFO L85 PathProgramCache]: Analyzing trace with hash 898335684, now seen corresponding path program 1 times [2025-02-07 20:32:59,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:32:59,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069509684] [2025-02-07 20:32:59,905 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:32:59,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:32:59,951 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-07 20:32:59,959 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-07 20:32:59,960 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:32:59,960 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:32:59,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-07 20:32:59,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:32:59,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069509684] [2025-02-07 20:32:59,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069509684] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:32:59,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680824619] [2025-02-07 20:32:59,991 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:32:59,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:32:59,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:32:59,993 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) [2025-02-07 20:32:59,994 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 [2025-02-07 20:33:00,019 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-07 20:33:00,038 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-07 20:33:00,038 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:33:00,038 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:33:00,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-02-07 20:33:00,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:33:00,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-07 20:33:00,046 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:33:00,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680824619] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:33:00,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-07 20:33:00,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-02-07 20:33:00,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176311226] [2025-02-07 20:33:00,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:33:00,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-07 20:33:00,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:33:00,060 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-07 20:33:00,060 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-07 20:33:00,062 INFO L87 Difference]: Start difference. First operand has 28 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2025-02-07 20:33:00,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:33:00,076 INFO L93 Difference]: Finished difference Result 54 states and 86 transitions. [2025-02-07 20:33:00,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-07 20:33:00,077 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 17 [2025-02-07 20:33:00,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:33:00,082 INFO L225 Difference]: With dead ends: 54 [2025-02-07 20:33:00,082 INFO L226 Difference]: Without dead ends: 25 [2025-02-07 20:33:00,084 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-07 20:33:00,086 INFO L435 NwaCegarLoop]: 37 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, 37 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 [2025-02-07 20:33:00,088 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:33:00,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-02-07 20:33:00,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2025-02-07 20:33:00,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-07 20:33:00,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2025-02-07 20:33:00,116 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 17 [2025-02-07 20:33:00,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:33:00,117 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2025-02-07 20:33:00,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2025-02-07 20:33:00,117 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2025-02-07 20:33:00,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-02-07 20:33:00,119 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:33:00,119 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:33:00,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-07 20:33:00,320 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 [2025-02-07 20:33:00,320 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:33:00,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:33:00,320 INFO L85 PathProgramCache]: Analyzing trace with hash -956624687, now seen corresponding path program 1 times [2025-02-07 20:33:00,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:33:00,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710896176] [2025-02-07 20:33:00,321 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:33:00,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:33:00,325 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-07 20:33:00,346 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-07 20:33:00,346 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:33:00,346 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:33:00,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947223913] [2025-02-07 20:33:00,348 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:33:00,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:33:00,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:33:00,351 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) [2025-02-07 20:33:00,352 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 [2025-02-07 20:33:00,380 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-07 20:33:00,390 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-07 20:33:00,390 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:33:00,390 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:33:00,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-07 20:33:00,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:33:00,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:33:00,468 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:33:00,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:33:00,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710896176] [2025-02-07 20:33:00,469 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:33:00,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947223913] [2025-02-07 20:33:00,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947223913] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:33:00,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:33:00,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 20:33:00,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818218393] [2025-02-07 20:33:00,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:33:00,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:33:00,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:33:00,470 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:33:00,470 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:33:00,470 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2025-02-07 20:33:00,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:33:00,536 INFO L93 Difference]: Finished difference Result 42 states and 59 transitions. [2025-02-07 20:33:00,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 20:33:00,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 18 [2025-02-07 20:33:00,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:33:00,537 INFO L225 Difference]: With dead ends: 42 [2025-02-07 20:33:00,537 INFO L226 Difference]: Without dead ends: 40 [2025-02-07 20:33:00,538 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:33:00,538 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:33:00,538 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 105 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:33:00,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-02-07 20:33:00,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2025-02-07 20:33:00,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 20 states have (on average 1.35) internal successors, (27), 22 states have internal predecessors, (27), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-02-07 20:33:00,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 56 transitions. [2025-02-07 20:33:00,546 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 56 transitions. Word has length 18 [2025-02-07 20:33:00,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:33:00,546 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 56 transitions. [2025-02-07 20:33:00,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2025-02-07 20:33:00,546 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 56 transitions. [2025-02-07 20:33:00,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-02-07 20:33:00,547 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:33:00,547 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:33:00,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-07 20:33:00,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:33:00,748 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:33:00,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:33:00,748 INFO L85 PathProgramCache]: Analyzing trace with hash -955879912, now seen corresponding path program 1 times [2025-02-07 20:33:00,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:33:00,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879168402] [2025-02-07 20:33:00,748 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:33:00,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:33:00,752 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-07 20:33:00,758 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-07 20:33:00,758 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:33:00,758 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:33:00,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:33:00,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:33:00,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879168402] [2025-02-07 20:33:00,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879168402] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:33:00,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:33:00,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-07 20:33:00,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831082917] [2025-02-07 20:33:00,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:33:00,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-07 20:33:00,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:33:00,845 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-07 20:33:00,845 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-07 20:33:00,845 INFO L87 Difference]: Start difference. First operand 39 states and 56 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2025-02-07 20:33:00,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:33:00,860 INFO L93 Difference]: Finished difference Result 55 states and 74 transitions. [2025-02-07 20:33:00,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-07 20:33:00,860 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 18 [2025-02-07 20:33:00,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:33:00,862 INFO L225 Difference]: With dead ends: 55 [2025-02-07 20:33:00,862 INFO L226 Difference]: Without dead ends: 41 [2025-02-07 20:33:00,863 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-07 20:33:00,864 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:33:00,865 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 85 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:33:00,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-02-07 20:33:00,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2025-02-07 20:33:00,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 24 states have internal predecessors, (29), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-02-07 20:33:00,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 58 transitions. [2025-02-07 20:33:00,872 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 58 transitions. Word has length 18 [2025-02-07 20:33:00,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:33:00,872 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 58 transitions. [2025-02-07 20:33:00,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2025-02-07 20:33:00,872 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 58 transitions. [2025-02-07 20:33:00,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-02-07 20:33:00,872 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:33:00,873 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:33:00,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-07 20:33:00,873 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:33:00,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:33:00,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1313637675, now seen corresponding path program 1 times [2025-02-07 20:33:00,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:33:00,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804304276] [2025-02-07 20:33:00,873 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:33:00,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:33:00,878 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-07 20:33:00,891 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-07 20:33:00,891 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:33:00,891 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:33:00,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1446566897] [2025-02-07 20:33:00,892 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:33:00,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:33:00,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:33:00,894 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) [2025-02-07 20:33:00,895 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 [2025-02-07 20:33:00,916 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-07 20:33:00,926 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-07 20:33:00,926 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:33:00,926 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:33:00,927 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-07 20:33:00,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:33:00,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:33:00,996 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:33:00,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:33:00,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804304276] [2025-02-07 20:33:00,996 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:33:00,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446566897] [2025-02-07 20:33:00,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446566897] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:33:00,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:33:00,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 20:33:00,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478381839] [2025-02-07 20:33:00,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:33:00,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:33:00,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:33:00,997 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:33:00,998 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:33:00,998 INFO L87 Difference]: Start difference. First operand 41 states and 58 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2025-02-07 20:33:01,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:33:01,056 INFO L93 Difference]: Finished difference Result 66 states and 99 transitions. [2025-02-07 20:33:01,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 20:33:01,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 23 [2025-02-07 20:33:01,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:33:01,059 INFO L225 Difference]: With dead ends: 66 [2025-02-07 20:33:01,059 INFO L226 Difference]: Without dead ends: 64 [2025-02-07 20:33:01,059 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:33:01,059 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:33:01,059 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 122 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:33:01,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-02-07 20:33:01,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2025-02-07 20:33:01,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 21 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2025-02-07 20:33:01,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 84 transitions. [2025-02-07 20:33:01,087 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 84 transitions. Word has length 23 [2025-02-07 20:33:01,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:33:01,088 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 84 transitions. [2025-02-07 20:33:01,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2025-02-07 20:33:01,088 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 84 transitions. [2025-02-07 20:33:01,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-02-07 20:33:01,089 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:33:01,089 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] [2025-02-07 20:33:01,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-07 20:33:01,290 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 [2025-02-07 20:33:01,290 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:33:01,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:33:01,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1027252561, now seen corresponding path program 1 times [2025-02-07 20:33:01,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:33:01,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2481352] [2025-02-07 20:33:01,291 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:33:01,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:33:01,296 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-07 20:33:01,314 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-07 20:33:01,315 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:33:01,315 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:33:01,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085158068] [2025-02-07 20:33:01,315 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:33:01,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:33:01,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:33:01,317 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) [2025-02-07 20:33:01,319 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 [2025-02-07 20:33:01,341 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-07 20:33:01,354 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-07 20:33:01,354 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:33:01,354 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:33:01,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 20:33:01,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:33:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-07 20:33:01,410 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:33:01,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:33:01,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2481352] [2025-02-07 20:33:01,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:33:01,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085158068] [2025-02-07 20:33:01,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085158068] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:33:01,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:33:01,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 20:33:01,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669889935] [2025-02-07 20:33:01,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:33:01,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:33:01,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:33:01,412 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:33:01,412 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:33:01,412 INFO L87 Difference]: Start difference. First operand 57 states and 84 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2025-02-07 20:33:01,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:33:01,454 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2025-02-07 20:33:01,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 20:33:01,454 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 28 [2025-02-07 20:33:01,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:33:01,455 INFO L225 Difference]: With dead ends: 64 [2025-02-07 20:33:01,455 INFO L226 Difference]: Without dead ends: 60 [2025-02-07 20:33:01,455 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:33:01,455 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:33:01,456 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 107 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:33:01,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-02-07 20:33:01,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2025-02-07 20:33:01,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 36 states have internal predecessors, (46), 20 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2025-02-07 20:33:01,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 84 transitions. [2025-02-07 20:33:01,469 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 84 transitions. Word has length 28 [2025-02-07 20:33:01,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:33:01,470 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 84 transitions. [2025-02-07 20:33:01,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2025-02-07 20:33:01,470 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 84 transitions. [2025-02-07 20:33:01,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-02-07 20:33:01,470 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:33:01,470 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] [2025-02-07 20:33:01,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-07 20:33:01,671 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 [2025-02-07 20:33:01,671 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:33:01,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:33:01,671 INFO L85 PathProgramCache]: Analyzing trace with hash -234456630, now seen corresponding path program 1 times [2025-02-07 20:33:01,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:33:01,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906068134] [2025-02-07 20:33:01,672 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:33:01,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:33:01,675 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-02-07 20:33:01,682 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-02-07 20:33:01,683 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:33:01,683 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:33:01,781 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-07 20:33:01,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:33:01,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906068134] [2025-02-07 20:33:01,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906068134] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:33:01,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:33:01,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 20:33:01,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44305512] [2025-02-07 20:33:01,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:33:01,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:33:01,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:33:01,782 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:33:01,782 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:33:01,783 INFO L87 Difference]: Start difference. First operand 60 states and 84 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2025-02-07 20:33:01,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:33:01,817 INFO L93 Difference]: Finished difference Result 72 states and 99 transitions. [2025-02-07 20:33:01,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 20:33:01,818 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2025-02-07 20:33:01,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:33:01,818 INFO L225 Difference]: With dead ends: 72 [2025-02-07 20:33:01,819 INFO L226 Difference]: Without dead ends: 70 [2025-02-07 20:33:01,819 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:33:01,819 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 3 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:33:01,819 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 131 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:33:01,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2025-02-07 20:33:01,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2025-02-07 20:33:01,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 41 states have internal predecessors, (49), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2025-02-07 20:33:01,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 91 transitions. [2025-02-07 20:33:01,830 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 91 transitions. Word has length 34 [2025-02-07 20:33:01,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:33:01,830 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 91 transitions. [2025-02-07 20:33:01,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2025-02-07 20:33:01,831 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 91 transitions. [2025-02-07 20:33:01,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-07 20:33:01,831 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:33:01,831 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:33:01,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-07 20:33:01,831 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:33:01,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:33:01,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1884812455, now seen corresponding path program 1 times [2025-02-07 20:33:01,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:33:01,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417612947] [2025-02-07 20:33:01,832 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:33:01,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:33:01,836 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-07 20:33:01,841 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-07 20:33:01,841 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:33:01,841 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:33:01,924 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-07 20:33:01,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:33:01,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417612947] [2025-02-07 20:33:01,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417612947] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:33:01,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165396890] [2025-02-07 20:33:01,925 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:33:01,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:33:01,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:33:01,927 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) [2025-02-07 20:33:01,928 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 [2025-02-07 20:33:01,950 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-07 20:33:01,961 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-07 20:33:01,962 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:33:01,962 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:33:01,964 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-07 20:33:01,965 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:33:02,008 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-07 20:33:02,008 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:33:02,069 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-07 20:33:02,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165396890] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:33:02,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:33:02,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 10 [2025-02-07 20:33:02,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262865187] [2025-02-07 20:33:02,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:33:02,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-07 20:33:02,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:33:02,074 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-07 20:33:02,074 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-02-07 20:33:02,074 INFO L87 Difference]: Start difference. First operand 66 states and 91 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2025-02-07 20:33:02,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:33:02,192 INFO L93 Difference]: Finished difference Result 199 states and 254 transitions. [2025-02-07 20:33:02,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-07 20:33:02,192 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 37 [2025-02-07 20:33:02,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:33:02,193 INFO L225 Difference]: With dead ends: 199 [2025-02-07 20:33:02,193 INFO L226 Difference]: Without dead ends: 185 [2025-02-07 20:33:02,193 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2025-02-07 20:33:02,194 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 52 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:33:02,194 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 121 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:33:02,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2025-02-07 20:33:02,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 179. [2025-02-07 20:33:02,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 107 states have (on average 1.2242990654205608) internal successors, (131), 115 states have internal predecessors, (131), 51 states have call successors, (51), 21 states have call predecessors, (51), 20 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2025-02-07 20:33:02,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 226 transitions. [2025-02-07 20:33:02,221 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 226 transitions. Word has length 37 [2025-02-07 20:33:02,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:33:02,221 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 226 transitions. [2025-02-07 20:33:02,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2025-02-07 20:33:02,222 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 226 transitions. [2025-02-07 20:33:02,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-07 20:33:02,222 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:33:02,222 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:33:02,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-07 20:33:02,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:33:02,423 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:33:02,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:33:02,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1523395935, now seen corresponding path program 1 times [2025-02-07 20:33:02,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:33:02,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494837870] [2025-02-07 20:33:02,424 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:33:02,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:33:02,428 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-07 20:33:02,437 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-07 20:33:02,437 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:33:02,437 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:33:02,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [625732076] [2025-02-07 20:33:02,438 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:33:02,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:33:02,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:33:02,440 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) [2025-02-07 20:33:02,442 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 [2025-02-07 20:33:02,464 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-07 20:33:02,475 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-07 20:33:02,475 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:33:02,475 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:33:02,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-07 20:33:02,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:33:02,546 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-07 20:33:02,546 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:33:02,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:33:02,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494837870] [2025-02-07 20:33:02,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:33:02,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625732076] [2025-02-07 20:33:02,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625732076] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:33:02,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:33:02,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 20:33:02,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907837474] [2025-02-07 20:33:02,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:33:02,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:33:02,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:33:02,547 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:33:02,547 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:33:02,547 INFO L87 Difference]: Start difference. First operand 179 states and 226 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2025-02-07 20:33:02,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:33:02,588 INFO L93 Difference]: Finished difference Result 202 states and 255 transitions. [2025-02-07 20:33:02,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 20:33:02,589 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 [2025-02-07 20:33:02,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:33:02,591 INFO L225 Difference]: With dead ends: 202 [2025-02-07 20:33:02,591 INFO L226 Difference]: Without dead ends: 200 [2025-02-07 20:33:02,591 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 [2025-02-07 20:33:02,591 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 5 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:33:02,592 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 108 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:33:02,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2025-02-07 20:33:02,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2025-02-07 20:33:02,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 116 states have (on average 1.206896551724138) internal successors, (140), 127 states have internal predecessors, (140), 58 states have call successors, (58), 24 states have call predecessors, (58), 23 states have return successors, (51), 46 states have call predecessors, (51), 51 states have call successors, (51) [2025-02-07 20:33:02,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 249 transitions. [2025-02-07 20:33:02,615 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 249 transitions. Word has length 37 [2025-02-07 20:33:02,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:33:02,615 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 249 transitions. [2025-02-07 20:33:02,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2025-02-07 20:33:02,615 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 249 transitions. [2025-02-07 20:33:02,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-07 20:33:02,616 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:33:02,616 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:33:02,621 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 [2025-02-07 20:33:02,819 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-02-07 20:33:02,819 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:33:02,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:33:02,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1924237458, now seen corresponding path program 1 times [2025-02-07 20:33:02,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:33:02,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735644169] [2025-02-07 20:33:02,819 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:33:02,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:33:02,822 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-07 20:33:02,827 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 20:33:02,827 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:33:02,827 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:33:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-07 20:33:02,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:33:02,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735644169] [2025-02-07 20:33:02,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735644169] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:33:02,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846289215] [2025-02-07 20:33:02,985 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:33:02,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:33:02,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:33:02,986 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) [2025-02-07 20:33:02,988 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 [2025-02-07 20:33:03,006 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-07 20:33:03,020 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 20:33:03,020 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:33:03,020 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:33:03,020 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-07 20:33:03,021 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:33:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-07 20:33:03,125 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:33:03,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846289215] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:33:03,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-07 20:33:03,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2025-02-07 20:33:03,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437657722] [2025-02-07 20:33:03,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:33:03,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-07 20:33:03,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:33:03,126 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-07 20:33:03,126 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2025-02-07 20:33:03,127 INFO L87 Difference]: Start difference. First operand 198 states and 249 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2025-02-07 20:33:03,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:33:03,216 INFO L93 Difference]: Finished difference Result 229 states and 278 transitions. [2025-02-07 20:33:03,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 20:33:03,217 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2025-02-07 20:33:03,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:33:03,218 INFO L225 Difference]: With dead ends: 229 [2025-02-07 20:33:03,220 INFO L226 Difference]: Without dead ends: 219 [2025-02-07 20:33:03,220 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2025-02-07 20:33:03,221 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 7 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:33:03,221 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 131 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:33:03,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2025-02-07 20:33:03,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 215. [2025-02-07 20:33:03,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 129 states have (on average 1.178294573643411) internal successors, (152), 140 states have internal predecessors, (152), 57 states have call successors, (57), 28 states have call predecessors, (57), 28 states have return successors, (51), 46 states have call predecessors, (51), 51 states have call successors, (51) [2025-02-07 20:33:03,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 260 transitions. [2025-02-07 20:33:03,237 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 260 transitions. Word has length 39 [2025-02-07 20:33:03,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:33:03,237 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 260 transitions. [2025-02-07 20:33:03,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2025-02-07 20:33:03,237 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 260 transitions. [2025-02-07 20:33:03,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-02-07 20:33:03,238 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:33:03,238 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:33:03,243 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 [2025-02-07 20:33:03,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:33:03,442 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:33:03,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:33:03,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1828962300, now seen corresponding path program 1 times [2025-02-07 20:33:03,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:33:03,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864893454] [2025-02-07 20:33:03,442 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:33:03,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:33:03,446 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-02-07 20:33:03,454 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-02-07 20:33:03,454 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:33:03,454 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:33:03,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1504589494] [2025-02-07 20:33:03,455 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:33:03,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:33:03,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:33:03,456 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) [2025-02-07 20:33:03,458 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 [2025-02-07 20:33:03,479 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-02-07 20:33:03,491 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-02-07 20:33:03,491 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:33:03,491 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:33:03,492 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-07 20:33:03,493 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:33:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-07 20:33:03,634 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:33:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-07 20:33:03,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:33:03,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864893454] [2025-02-07 20:33:03,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:33:03,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504589494] [2025-02-07 20:33:03,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504589494] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:33:03,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:33:03,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2025-02-07 20:33:03,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397246009] [2025-02-07 20:33:03,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 20:33:03,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-07 20:33:03,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:33:03,717 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-07 20:33:03,717 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-07 20:33:03,717 INFO L87 Difference]: Start difference. First operand 215 states and 260 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2025-02-07 20:33:03,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:33:03,978 INFO L93 Difference]: Finished difference Result 254 states and 316 transitions. [2025-02-07 20:33:03,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-07 20:33:03,978 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 42 [2025-02-07 20:33:03,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:33:03,979 INFO L225 Difference]: With dead ends: 254 [2025-02-07 20:33:03,980 INFO L226 Difference]: Without dead ends: 212 [2025-02-07 20:33:03,980 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2025-02-07 20:33:03,980 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 15 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 20:33:03,980 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 169 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 20:33:03,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2025-02-07 20:33:04,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 187. [2025-02-07 20:33:04,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 119 states have (on average 1.1596638655462186) internal successors, (138), 125 states have internal predecessors, (138), 43 states have call successors, (43), 25 states have call predecessors, (43), 24 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2025-02-07 20:33:04,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 219 transitions. [2025-02-07 20:33:04,006 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 219 transitions. Word has length 42 [2025-02-07 20:33:04,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:33:04,006 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 219 transitions. [2025-02-07 20:33:04,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2025-02-07 20:33:04,006 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 219 transitions. [2025-02-07 20:33:04,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-02-07 20:33:04,007 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:33:04,007 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:33:04,013 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 [2025-02-07 20:33:04,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:33:04,211 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:33:04,211 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:33:04,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1239305138, now seen corresponding path program 1 times [2025-02-07 20:33:04,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:33:04,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58805417] [2025-02-07 20:33:04,212 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:33:04,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:33:04,216 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-02-07 20:33:04,225 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-02-07 20:33:04,225 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:33:04,226 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:33:04,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274415657] [2025-02-07 20:33:04,227 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:33:04,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:33:04,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:33:04,228 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) [2025-02-07 20:33:04,230 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 [2025-02-07 20:33:04,253 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-02-07 20:33:04,268 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-02-07 20:33:04,268 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:33:04,268 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:33:04,269 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-02-07 20:33:04,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:33:04,452 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2025-02-07 20:33:04,452 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:33:04,635 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-02-07 20:33:04,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:33:04,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58805417] [2025-02-07 20:33:04,635 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:33:04,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274415657] [2025-02-07 20:33:04,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274415657] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:33:04,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:33:04,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2025-02-07 20:33:04,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109233379] [2025-02-07 20:33:04,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 20:33:04,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-07 20:33:04,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:33:04,636 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-07 20:33:04,636 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2025-02-07 20:33:04,636 INFO L87 Difference]: Start difference. First operand 187 states and 219 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-02-07 20:33:04,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:33:04,873 INFO L93 Difference]: Finished difference Result 207 states and 245 transitions. [2025-02-07 20:33:04,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-07 20:33:04,874 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 56 [2025-02-07 20:33:04,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:33:04,875 INFO L225 Difference]: With dead ends: 207 [2025-02-07 20:33:04,875 INFO L226 Difference]: Without dead ends: 200 [2025-02-07 20:33:04,875 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2025-02-07 20:33:04,876 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 30 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 20:33:04,876 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 414 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 20:33:04,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2025-02-07 20:33:04,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 178. [2025-02-07 20:33:04,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 119 states have (on average 1.1512605042016806) internal successors, (137), 121 states have internal predecessors, (137), 34 states have call successors, (34), 25 states have call predecessors, (34), 24 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2025-02-07 20:33:04,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 203 transitions. [2025-02-07 20:33:04,894 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 203 transitions. Word has length 56 [2025-02-07 20:33:04,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:33:04,895 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 203 transitions. [2025-02-07 20:33:04,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-02-07 20:33:04,895 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 203 transitions. [2025-02-07 20:33:04,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-02-07 20:33:04,895 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:33:04,895 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] [2025-02-07 20:33:04,901 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 [2025-02-07 20:33:05,100 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 [2025-02-07 20:33:05,100 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:33:05,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:33:05,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1704787613, now seen corresponding path program 1 times [2025-02-07 20:33:05,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:33:05,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098072204] [2025-02-07 20:33:05,101 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:33:05,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:33:05,104 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-02-07 20:33:05,112 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-02-07 20:33:05,112 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:33:05,112 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:33:05,236 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2025-02-07 20:33:05,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:33:05,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098072204] [2025-02-07 20:33:05,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098072204] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:33:05,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539142127] [2025-02-07 20:33:05,236 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:33:05,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:33:05,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:33:05,238 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) [2025-02-07 20:33:05,239 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 [2025-02-07 20:33:05,258 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-02-07 20:33:05,270 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-02-07 20:33:05,270 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:33:05,270 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:33:05,271 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-07 20:33:05,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:33:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2025-02-07 20:33:05,328 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:33:05,399 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2025-02-07 20:33:05,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539142127] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:33:05,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:33:05,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 13 [2025-02-07 20:33:05,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462479819] [2025-02-07 20:33:05,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:33:05,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-07 20:33:05,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:33:05,400 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-07 20:33:05,400 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2025-02-07 20:33:05,400 INFO L87 Difference]: Start difference. First operand 178 states and 203 transitions. Second operand has 13 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2025-02-07 20:33:05,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:33:05,487 INFO L93 Difference]: Finished difference Result 204 states and 232 transitions. [2025-02-07 20:33:05,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-07 20:33:05,487 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) Word has length 58 [2025-02-07 20:33:05,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:33:05,488 INFO L225 Difference]: With dead ends: 204 [2025-02-07 20:33:05,488 INFO L226 Difference]: Without dead ends: 184 [2025-02-07 20:33:05,489 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-02-07 20:33:05,489 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 19 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:33:05,489 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 99 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:33:05,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2025-02-07 20:33:05,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2025-02-07 20:33:05,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 123 states have (on average 1.113821138211382) internal successors, (137), 127 states have internal predecessors, (137), 36 states have call successors, (36), 24 states have call predecessors, (36), 24 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2025-02-07 20:33:05,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 207 transitions. [2025-02-07 20:33:05,512 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 207 transitions. Word has length 58 [2025-02-07 20:33:05,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:33:05,512 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 207 transitions. [2025-02-07 20:33:05,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2025-02-07 20:33:05,512 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 207 transitions. [2025-02-07 20:33:05,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2025-02-07 20:33:05,513 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:33:05,513 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:33:05,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-07 20:33:05,715 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 [2025-02-07 20:33:05,715 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:33:05,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:33:05,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1662798504, now seen corresponding path program 2 times [2025-02-07 20:33:05,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:33:05,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928964300] [2025-02-07 20:33:05,716 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:33:05,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:33:05,721 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 94 statements into 2 equivalence classes. [2025-02-07 20:33:05,733 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 94 of 94 statements. [2025-02-07 20:33:05,733 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:33:05,733 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:33:05,904 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2025-02-07 20:33:05,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:33:05,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928964300] [2025-02-07 20:33:05,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928964300] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:33:05,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288883900] [2025-02-07 20:33:05,904 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:33:05,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:33:05,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:33:05,906 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) [2025-02-07 20:33:05,907 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 [2025-02-07 20:33:05,940 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 94 statements into 2 equivalence classes. [2025-02-07 20:33:05,960 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 94 of 94 statements. [2025-02-07 20:33:05,960 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:33:05,960 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:33:05,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-07 20:33:05,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:33:06,055 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 266 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2025-02-07 20:33:06,055 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:33:06,182 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2025-02-07 20:33:06,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288883900] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:33:06,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:33:06,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 8] total 17 [2025-02-07 20:33:06,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064440302] [2025-02-07 20:33:06,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:33:06,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-07 20:33:06,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:33:06,184 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-07 20:33:06,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2025-02-07 20:33:06,184 INFO L87 Difference]: Start difference. First operand 184 states and 207 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 12 states have call successors, (43), 7 states have call predecessors, (43), 6 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) [2025-02-07 20:33:06,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:33:06,408 INFO L93 Difference]: Finished difference Result 511 states and 600 transitions. [2025-02-07 20:33:06,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-07 20:33:06,408 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 12 states have call successors, (43), 7 states have call predecessors, (43), 6 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) Word has length 94 [2025-02-07 20:33:06,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:33:06,410 INFO L225 Difference]: With dead ends: 511 [2025-02-07 20:33:06,410 INFO L226 Difference]: Without dead ends: 502 [2025-02-07 20:33:06,411 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2025-02-07 20:33:06,411 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 70 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:33:06,411 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 161 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:33:06,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2025-02-07 20:33:06,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 502. [2025-02-07 20:33:06,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 333 states have (on average 1.0960960960960962) internal successors, (365), 343 states have internal predecessors, (365), 102 states have call successors, (102), 66 states have call predecessors, (102), 66 states have return successors, (100), 92 states have call predecessors, (100), 100 states have call successors, (100) [2025-02-07 20:33:06,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 567 transitions. [2025-02-07 20:33:06,483 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 567 transitions. Word has length 94 [2025-02-07 20:33:06,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:33:06,483 INFO L471 AbstractCegarLoop]: Abstraction has 502 states and 567 transitions. [2025-02-07 20:33:06,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 12 states have call successors, (43), 7 states have call predecessors, (43), 6 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) [2025-02-07 20:33:06,483 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 567 transitions. [2025-02-07 20:33:06,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2025-02-07 20:33:06,486 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:33:06,487 INFO L218 NwaCegarLoop]: trace histogram [31, 30, 30, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:33:06,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-07 20:33:06,687 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 [2025-02-07 20:33:06,687 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:33:06,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:33:06,688 INFO L85 PathProgramCache]: Analyzing trace with hash -348373960, now seen corresponding path program 3 times [2025-02-07 20:33:06,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:33:06,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34468024] [2025-02-07 20:33:06,688 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:33:06,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:33:06,697 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 208 statements into 22 equivalence classes. [2025-02-07 20:33:06,755 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) and asserted 193 of 208 statements. [2025-02-07 20:33:06,755 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2025-02-07 20:33:06,755 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:33:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2139 backedges. 60 proven. 335 refuted. 0 times theorem prover too weak. 1744 trivial. 0 not checked. [2025-02-07 20:33:07,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:33:07,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34468024] [2025-02-07 20:33:07,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34468024] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:33:07,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161160734] [2025-02-07 20:33:07,491 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:33:07,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:33:07,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:33:07,495 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) [2025-02-07 20:33:07,496 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 [2025-02-07 20:33:07,536 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 208 statements into 22 equivalence classes. [2025-02-07 20:33:07,609 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) and asserted 193 of 208 statements. [2025-02-07 20:33:07,609 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2025-02-07 20:33:07,609 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:33:07,611 INFO L256 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-07 20:33:07,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:33:07,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2139 backedges. 60 proven. 1955 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2025-02-07 20:33:07,805 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:33:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2139 backedges. 60 proven. 335 refuted. 0 times theorem prover too weak. 1744 trivial. 0 not checked. [2025-02-07 20:33:08,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161160734] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:33:08,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:33:08,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13, 14] total 36 [2025-02-07 20:33:08,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730423313] [2025-02-07 20:33:08,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:33:08,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-02-07 20:33:08,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:33:08,179 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-02-07 20:33:08,179 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=521, Invalid=739, Unknown=0, NotChecked=0, Total=1260 [2025-02-07 20:33:08,180 INFO L87 Difference]: Start difference. First operand 502 states and 567 transitions. Second operand has 36 states, 36 states have (on average 4.166666666666667) internal successors, (150), 36 states have internal predecessors, (150), 24 states have call successors, (97), 13 states have call predecessors, (97), 12 states have return successors, (96), 23 states have call predecessors, (96), 23 states have call successors, (96) [2025-02-07 20:33:08,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:33:08,763 INFO L93 Difference]: Finished difference Result 1147 states and 1344 transitions. [2025-02-07 20:33:08,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-02-07 20:33:08,763 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.166666666666667) internal successors, (150), 36 states have internal predecessors, (150), 24 states have call successors, (97), 13 states have call predecessors, (97), 12 states have return successors, (96), 23 states have call predecessors, (96), 23 states have call successors, (96) Word has length 208 [2025-02-07 20:33:08,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:33:08,769 INFO L225 Difference]: With dead ends: 1147 [2025-02-07 20:33:08,770 INFO L226 Difference]: Without dead ends: 1138 [2025-02-07 20:33:08,771 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=857, Invalid=1495, Unknown=0, NotChecked=0, Total=2352 [2025-02-07 20:33:08,771 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 158 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 20:33:08,771 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 271 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 20:33:08,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2025-02-07 20:33:08,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1138. [2025-02-07 20:33:08,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 753 states have (on average 1.0903054448871181) internal successors, (821), 775 states have internal predecessors, (821), 234 states have call successors, (234), 150 states have call predecessors, (234), 150 states have return successors, (232), 212 states have call predecessors, (232), 232 states have call successors, (232) [2025-02-07 20:33:08,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1287 transitions. [2025-02-07 20:33:08,911 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1287 transitions. Word has length 208 [2025-02-07 20:33:08,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:33:08,911 INFO L471 AbstractCegarLoop]: Abstraction has 1138 states and 1287 transitions. [2025-02-07 20:33:08,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.166666666666667) internal successors, (150), 36 states have internal predecessors, (150), 24 states have call successors, (97), 13 states have call predecessors, (97), 12 states have return successors, (96), 23 states have call predecessors, (96), 23 states have call successors, (96) [2025-02-07 20:33:08,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1287 transitions. [2025-02-07 20:33:08,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2025-02-07 20:33:08,916 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:33:08,916 INFO L218 NwaCegarLoop]: trace histogram [67, 66, 66, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:33:08,923 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 [2025-02-07 20:33:09,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:33:09,120 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:33:09,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:33:09,120 INFO L85 PathProgramCache]: Analyzing trace with hash 74179064, now seen corresponding path program 4 times [2025-02-07 20:33:09,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:33:09,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129607820] [2025-02-07 20:33:09,121 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 20:33:09,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:33:09,132 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 436 statements into 2 equivalence classes. [2025-02-07 20:33:09,225 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 436 of 436 statements. [2025-02-07 20:33:09,225 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 20:33:09,225 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:33:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 10377 backedges. 132 proven. 1661 refuted. 0 times theorem prover too weak. 8584 trivial. 0 not checked. [2025-02-07 20:33:10,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:33:10,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129607820] [2025-02-07 20:33:10,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129607820] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:33:10,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019648386] [2025-02-07 20:33:10,556 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 20:33:10,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:33:10,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:33:10,558 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) [2025-02-07 20:33:10,560 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 [2025-02-07 20:33:10,618 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 436 statements into 2 equivalence classes. [2025-02-07 20:33:10,699 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 436 of 436 statements. [2025-02-07 20:33:10,700 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 20:33:10,700 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:33:10,703 INFO L256 TraceCheckSpWp]: Trace formula consists of 951 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-02-07 20:33:10,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:33:11,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10377 backedges. 132 proven. 9977 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2025-02-07 20:33:11,085 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:33:11,947 INFO L134 CoverageAnalysis]: Checked inductivity of 10377 backedges. 132 proven. 1661 refuted. 0 times theorem prover too weak. 8584 trivial. 0 not checked. [2025-02-07 20:33:11,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019648386] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:33:11,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:33:11,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 26] total 52 [2025-02-07 20:33:11,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998329163] [2025-02-07 20:33:11,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:33:11,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2025-02-07 20:33:11,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:33:11,950 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2025-02-07 20:33:11,950 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2025-02-07 20:33:11,951 INFO L87 Difference]: Start difference. First operand 1138 states and 1287 transitions. Second operand has 52 states, 52 states have (on average 5.115384615384615) internal successors, (266), 52 states have internal predecessors, (266), 48 states have call successors, (205), 25 states have call predecessors, (205), 24 states have return successors, (204), 47 states have call predecessors, (204), 47 states have call successors, (204) [2025-02-07 20:33:13,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:33:13,483 INFO L93 Difference]: Finished difference Result 2419 states and 2832 transitions. [2025-02-07 20:33:13,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2025-02-07 20:33:13,484 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 5.115384615384615) internal successors, (266), 52 states have internal predecessors, (266), 48 states have call successors, (205), 25 states have call predecessors, (205), 24 states have return successors, (204), 47 states have call predecessors, (204), 47 states have call successors, (204) Word has length 436 [2025-02-07 20:33:13,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:33:13,496 INFO L225 Difference]: With dead ends: 2419 [2025-02-07 20:33:13,496 INFO L226 Difference]: Without dead ends: 2410 [2025-02-07 20:33:13,506 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 941 GetRequests, 847 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3364, Invalid=5756, Unknown=0, NotChecked=0, Total=9120 [2025-02-07 20:33:13,506 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 377 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-07 20:33:13,507 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 389 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-07 20:33:13,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2025-02-07 20:33:13,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 2410. [2025-02-07 20:33:13,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2410 states, 1593 states have (on average 1.0878844946641557) internal successors, (1733), 1639 states have internal predecessors, (1733), 498 states have call successors, (498), 318 states have call predecessors, (498), 318 states have return successors, (496), 452 states have call predecessors, (496), 496 states have call successors, (496) [2025-02-07 20:33:13,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2410 states to 2410 states and 2727 transitions. [2025-02-07 20:33:13,709 INFO L78 Accepts]: Start accepts. Automaton has 2410 states and 2727 transitions. Word has length 436 [2025-02-07 20:33:13,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:33:13,709 INFO L471 AbstractCegarLoop]: Abstraction has 2410 states and 2727 transitions. [2025-02-07 20:33:13,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 5.115384615384615) internal successors, (266), 52 states have internal predecessors, (266), 48 states have call successors, (205), 25 states have call predecessors, (205), 24 states have return successors, (204), 47 states have call predecessors, (204), 47 states have call successors, (204) [2025-02-07 20:33:13,710 INFO L276 IsEmpty]: Start isEmpty. Operand 2410 states and 2727 transitions. [2025-02-07 20:33:13,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 893 [2025-02-07 20:33:13,724 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:33:13,724 INFO L218 NwaCegarLoop]: trace histogram [139, 138, 138, 47, 46, 46, 46, 46, 46, 46, 46, 46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:33:13,731 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 [2025-02-07 20:33:13,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:33:13,928 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:33:13,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:33:13,928 INFO L85 PathProgramCache]: Analyzing trace with hash -221409928, now seen corresponding path program 5 times [2025-02-07 20:33:13,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:33:13,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437194479] [2025-02-07 20:33:13,929 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 20:33:13,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:33:13,949 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 892 statements into 90 equivalence classes. [2025-02-07 20:33:14,440 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) and asserted 892 of 892 statements. [2025-02-07 20:33:14,440 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2025-02-07 20:33:14,440 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:33:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 45429 backedges. 276 proven. 7337 refuted. 0 times theorem prover too weak. 37816 trivial. 0 not checked. [2025-02-07 20:33:19,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:33:19,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437194479] [2025-02-07 20:33:19,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437194479] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:33:19,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690532499] [2025-02-07 20:33:19,263 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 20:33:19,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:33:19,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:33:19,266 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) [2025-02-07 20:33:19,267 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 [2025-02-07 20:33:19,349 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 892 statements into 90 equivalence classes. [2025-02-07 20:33:21,997 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) and asserted 892 of 892 statements. [2025-02-07 20:33:21,997 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2025-02-07 20:33:21,998 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:33:22,005 INFO L256 TraceCheckSpWp]: Trace formula consists of 1911 conjuncts, 95 conjuncts are in the unsatisfiable core [2025-02-07 20:33:22,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:33:22,679 INFO L134 CoverageAnalysis]: Checked inductivity of 45429 backedges. 276 proven. 44597 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2025-02-07 20:33:22,679 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:33:24,882 INFO L134 CoverageAnalysis]: Checked inductivity of 45429 backedges. 276 proven. 7337 refuted. 0 times theorem prover too weak. 37816 trivial. 0 not checked. [2025-02-07 20:33:24,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690532499] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:33:24,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:33:24,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 49, 50] total 99 [2025-02-07 20:33:24,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258506323] [2025-02-07 20:33:24,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:33:24,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2025-02-07 20:33:24,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:33:24,886 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2025-02-07 20:33:24,888 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=5044, Unknown=0, NotChecked=0, Total=9702 [2025-02-07 20:33:24,889 INFO L87 Difference]: Start difference. First operand 2410 states and 2727 transitions. Second operand has 99 states, 99 states have (on average 5.333333333333333) internal successors, (528), 99 states have internal predecessors, (528), 95 states have call successors, (421), 49 states have call predecessors, (421), 48 states have return successors, (420), 94 states have call predecessors, (420), 94 states have call successors, (420) [2025-02-07 20:33:29,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:33:29,768 INFO L93 Difference]: Finished difference Result 4963 states and 5808 transitions. [2025-02-07 20:33:29,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2025-02-07 20:33:29,769 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 5.333333333333333) internal successors, (528), 99 states have internal predecessors, (528), 95 states have call successors, (421), 49 states have call predecessors, (421), 48 states have return successors, (420), 94 states have call predecessors, (420), 94 states have call successors, (420) Word has length 892 [2025-02-07 20:33:29,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:33:29,784 INFO L225 Difference]: With dead ends: 4963 [2025-02-07 20:33:29,785 INFO L226 Difference]: Without dead ends: 4954 [2025-02-07 20:33:29,791 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1925 GetRequests, 1736 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5716 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=13540, Invalid=22750, Unknown=0, NotChecked=0, Total=36290 [2025-02-07 20:33:29,791 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 1023 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-02-07 20:33:29,791 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1023 Valid, 646 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-02-07 20:33:29,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4954 states. [2025-02-07 20:33:30,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4954 to 4954. [2025-02-07 20:33:30,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4954 states, 3273 states have (on average 1.0867705468988695) internal successors, (3557), 3367 states have internal predecessors, (3557), 1026 states have call successors, (1026), 654 states have call predecessors, (1026), 654 states have return successors, (1024), 932 states have call predecessors, (1024), 1024 states have call successors, (1024) [2025-02-07 20:33:30,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4954 states to 4954 states and 5607 transitions. [2025-02-07 20:33:30,167 INFO L78 Accepts]: Start accepts. Automaton has 4954 states and 5607 transitions. Word has length 892 [2025-02-07 20:33:30,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:33:30,169 INFO L471 AbstractCegarLoop]: Abstraction has 4954 states and 5607 transitions. [2025-02-07 20:33:30,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 5.333333333333333) internal successors, (528), 99 states have internal predecessors, (528), 95 states have call successors, (421), 49 states have call predecessors, (421), 48 states have return successors, (420), 94 states have call predecessors, (420), 94 states have call successors, (420) [2025-02-07 20:33:30,170 INFO L276 IsEmpty]: Start isEmpty. Operand 4954 states and 5607 transitions. [2025-02-07 20:33:30,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1805 [2025-02-07 20:33:30,211 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:33:30,211 INFO L218 NwaCegarLoop]: trace histogram [283, 282, 282, 95, 94, 94, 94, 94, 94, 94, 94, 94, 94, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:33:30,222 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 [2025-02-07 20:33:30,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-07 20:33:30,412 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:33:30,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:33:30,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1277533064, now seen corresponding path program 6 times [2025-02-07 20:33:30,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:33:30,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825314762] [2025-02-07 20:33:30,413 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 20:33:30,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:33:30,465 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1804 statements into 180 equivalence classes. [2025-02-07 20:33:32,596 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 179 check-sat command(s) and asserted 1799 of 1804 statements. [2025-02-07 20:33:32,597 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 179 check-sat command(s) [2025-02-07 20:33:32,597 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:02,745 INFO L134 CoverageAnalysis]: Checked inductivity of 189837 backedges. 564 proven. 30785 refuted. 0 times theorem prover too weak. 158488 trivial. 0 not checked. [2025-02-07 20:34:02,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:02,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825314762] [2025-02-07 20:34:02,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825314762] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:02,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447252183] [2025-02-07 20:34:02,745 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 20:34:02,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:02,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:02,748 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) [2025-02-07 20:34:02,748 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 [2025-02-07 20:34:02,901 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1804 statements into 180 equivalence classes.