./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound5.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/egcd2-ll_unwindbound5.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 74e9855722264d342377b8ab219a69c32c582cc628f82167488f3dea5640534c --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 20:34:11,390 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 20:34:11,450 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 20:34:11,455 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 20:34:11,455 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 20:34:11,474 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 20:34:11,475 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 20:34:11,475 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 20:34:11,475 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 20:34:11,475 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 20:34:11,475 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 20:34:11,475 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 20:34:11,475 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 20:34:11,475 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 20:34:11,476 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 20:34:11,476 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 20:34:11,476 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 20:34:11,476 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 20:34:11,476 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 20:34:11,476 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 20:34:11,476 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 20:34:11,476 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 20:34:11,476 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 20:34:11,476 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 20:34:11,476 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 20:34:11,477 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 20:34:11,477 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 20:34:11,477 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 20:34:11,477 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 20:34:11,477 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 20:34:11,477 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 20:34:11,477 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 20:34:11,477 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 20:34:11,477 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 20:34:11,477 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 20:34:11,477 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 20:34:11,478 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 20:34:11,478 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 20:34:11,478 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 20:34:11,478 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 20:34:11,478 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 20:34:11,478 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 20:34:11,478 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 20:34:11,478 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 -> 74e9855722264d342377b8ab219a69c32c582cc628f82167488f3dea5640534c [2025-02-07 20:34:11,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 20:34:11,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 20:34:11,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 20:34:11,717 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 20:34:11,718 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 20:34:11,718 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound5.c [2025-02-07 20:34:12,889 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/96d80c25a/513d86ae3a8948f0900dd644378916a8/FLAG3efd1a945 [2025-02-07 20:34:13,131 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 20:34:13,132 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound5.c [2025-02-07 20:34:13,151 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/96d80c25a/513d86ae3a8948f0900dd644378916a8/FLAG3efd1a945 [2025-02-07 20:34:13,453 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/96d80c25a/513d86ae3a8948f0900dd644378916a8 [2025-02-07 20:34:13,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 20:34:13,455 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 20:34:13,456 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 20:34:13,456 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 20:34:13,459 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 20:34:13,460 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 08:34:13" (1/1) ... [2025-02-07 20:34:13,460 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c241f8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:13, skipping insertion in model container [2025-02-07 20:34:13,460 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 08:34:13" (1/1) ... [2025-02-07 20:34:13,470 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 20:34:13,575 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/egcd2-ll_unwindbound5.c[490,503] [2025-02-07 20:34:13,588 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 20:34:13,597 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 20:34:13,610 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/egcd2-ll_unwindbound5.c[490,503] [2025-02-07 20:34:13,623 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 20:34:13,638 INFO L204 MainTranslator]: Completed translation [2025-02-07 20:34:13,639 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:13 WrapperNode [2025-02-07 20:34:13,639 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 20:34:13,640 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 20:34:13,640 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 20:34:13,640 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 20:34:13,644 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:13" (1/1) ... [2025-02-07 20:34:13,648 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:13" (1/1) ... [2025-02-07 20:34:13,657 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 84 [2025-02-07 20:34:13,657 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 20:34:13,658 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 20:34:13,658 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 20:34:13,658 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 20:34:13,663 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:13" (1/1) ... [2025-02-07 20:34:13,663 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:13" (1/1) ... [2025-02-07 20:34:13,664 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:13" (1/1) ... [2025-02-07 20:34:13,671 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 20:34:13,671 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:13" (1/1) ... [2025-02-07 20:34:13,671 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:13" (1/1) ... [2025-02-07 20:34:13,673 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:13" (1/1) ... [2025-02-07 20:34:13,674 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:13" (1/1) ... [2025-02-07 20:34:13,674 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:13" (1/1) ... [2025-02-07 20:34:13,675 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:13" (1/1) ... [2025-02-07 20:34:13,677 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 20:34:13,678 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 20:34:13,678 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 20:34:13,678 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 20:34:13,680 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:13" (1/1) ... [2025-02-07 20:34:13,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 20:34:13,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:13,702 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 20:34:13,706 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 20:34:13,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 20:34:13,720 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-02-07 20:34:13,720 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-02-07 20:34:13,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 20:34:13,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 20:34:13,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 20:34:13,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-07 20:34:13,720 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-07 20:34:13,765 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 20:34:13,767 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 20:34:13,882 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2025-02-07 20:34:13,883 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 20:34:13,890 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 20:34:13,891 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 20:34:13,891 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:34:13 BoogieIcfgContainer [2025-02-07 20:34:13,891 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 20:34:13,894 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 20:34:13,894 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 20:34:13,897 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 20:34:13,897 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 08:34:13" (1/3) ... [2025-02-07 20:34:13,898 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@510e0c7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 08:34:13, skipping insertion in model container [2025-02-07 20:34:13,898 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:13" (2/3) ... [2025-02-07 20:34:13,899 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@510e0c7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 08:34:13, skipping insertion in model container [2025-02-07 20:34:13,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:34:13" (3/3) ... [2025-02-07 20:34:13,900 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound5.c [2025-02-07 20:34:13,910 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 20:34:13,911 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd2-ll_unwindbound5.c that has 3 procedures, 32 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-02-07 20:34:13,945 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 20:34:13,952 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;@185ad0b1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 20:34:13,956 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 20:34:13,958 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-02-07 20:34:13,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-02-07 20:34:13,963 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:13,964 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:13,966 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:13,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:13,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1447899124, now seen corresponding path program 1 times [2025-02-07 20:34:13,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:13,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746398635] [2025-02-07 20:34:13,979 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:13,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:14,045 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-07 20:34:14,062 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-07 20:34:14,063 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:14,063 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:14,108 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-07 20:34:14,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:14,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746398635] [2025-02-07 20:34:14,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746398635] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:34:14,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:34:14,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-07 20:34:14,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736426222] [2025-02-07 20:34:14,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:34:14,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-07 20:34:14,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:14,129 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-07 20:34:14,129 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-07 20:34:14,130 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-07 20:34:14,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:14,142 INFO L93 Difference]: Finished difference Result 62 states and 101 transitions. [2025-02-07 20:34:14,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-07 20:34:14,143 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2025-02-07 20:34:14,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:14,146 INFO L225 Difference]: With dead ends: 62 [2025-02-07 20:34:14,146 INFO L226 Difference]: Without dead ends: 29 [2025-02-07 20:34:14,148 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 20:34:14,150 INFO L435 NwaCegarLoop]: 43 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, 43 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 20:34:14,154 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:34:14,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-02-07 20:34:14,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2025-02-07 20:34:14,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-02-07 20:34:14,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2025-02-07 20:34:14,174 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 27 [2025-02-07 20:34:14,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:14,174 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2025-02-07 20:34:14,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-07 20:34:14,175 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2025-02-07 20:34:14,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-02-07 20:34:14,176 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:14,176 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:14,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 20:34:14,176 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:14,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:14,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1886374424, now seen corresponding path program 1 times [2025-02-07 20:34:14,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:14,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003326155] [2025-02-07 20:34:14,177 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:14,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:14,184 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-07 20:34:14,197 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-07 20:34:14,197 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:14,198 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:14,254 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-07 20:34:14,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:14,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003326155] [2025-02-07 20:34:14,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003326155] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:34:14,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:34:14,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-07 20:34:14,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78575293] [2025-02-07 20:34:14,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:34:14,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-07 20:34:14,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:14,256 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-07 20:34:14,256 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-07 20:34:14,256 INFO L87 Difference]: Start difference. First operand 29 states and 40 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-07 20:34:14,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:14,272 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2025-02-07 20:34:14,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-07 20:34:14,272 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2025-02-07 20:34:14,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:14,273 INFO L225 Difference]: With dead ends: 39 [2025-02-07 20:34:14,273 INFO L226 Difference]: Without dead ends: 31 [2025-02-07 20:34:14,273 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 20:34:14,274 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:14,274 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 98 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:34:14,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-02-07 20:34:14,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2025-02-07 20:34:14,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-02-07 20:34:14,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2025-02-07 20:34:14,278 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 28 [2025-02-07 20:34:14,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:14,279 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2025-02-07 20:34:14,279 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-07 20:34:14,279 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2025-02-07 20:34:14,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-02-07 20:34:14,279 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:14,279 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:14,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-07 20:34:14,280 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:14,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:14,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1704454544, now seen corresponding path program 1 times [2025-02-07 20:34:14,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:14,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521024622] [2025-02-07 20:34:14,280 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:14,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:14,286 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-07 20:34:14,296 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-07 20:34:14,297 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:14,297 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:14,390 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 20:34:14,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:14,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521024622] [2025-02-07 20:34:14,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521024622] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:14,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939142459] [2025-02-07 20:34:14,391 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:14,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:14,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:14,393 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 20:34:14,398 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 20:34:14,427 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-07 20:34:14,441 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-07 20:34:14,441 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:14,441 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:14,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-07 20:34:14,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:14,570 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-07 20:34:14,570 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:34:14,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939142459] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:34:14,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-07 20:34:14,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2025-02-07 20:34:14,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032808549] [2025-02-07 20:34:14,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:34:14,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-07 20:34:14,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:14,571 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-07 20:34:14,571 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-02-07 20:34:14,571 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 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 20:34:14,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:14,656 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2025-02-07 20:34:14,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 20:34:14,656 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 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 29 [2025-02-07 20:34:14,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:14,657 INFO L225 Difference]: With dead ends: 48 [2025-02-07 20:34:14,657 INFO L226 Difference]: Without dead ends: 46 [2025-02-07 20:34:14,657 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2025-02-07 20:34:14,658 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:14,658 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 141 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:34:14,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-02-07 20:34:14,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2025-02-07 20:34:14,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 25 states have (on average 1.32) internal successors, (33), 27 states have internal predecessors, (33), 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 20:34:14,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 62 transitions. [2025-02-07 20:34:14,670 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 62 transitions. Word has length 29 [2025-02-07 20:34:14,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:14,670 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 62 transitions. [2025-02-07 20:34:14,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 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 20:34:14,670 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 62 transitions. [2025-02-07 20:34:14,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-02-07 20:34:14,671 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:14,671 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:14,678 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 20:34:14,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:14,872 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:14,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:14,872 INFO L85 PathProgramCache]: Analyzing trace with hash -678028952, now seen corresponding path program 1 times [2025-02-07 20:34:14,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:14,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54211900] [2025-02-07 20:34:14,872 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:14,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:14,882 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-07 20:34:14,899 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-07 20:34:14,902 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:14,902 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:34:14,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642597722] [2025-02-07 20:34:14,907 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:14,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:14,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:14,910 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 20:34:14,911 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 20:34:14,938 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-07 20:34:14,950 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-07 20:34:14,951 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:14,951 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:14,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-07 20:34:14,952 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:14,989 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-07 20:34:14,990 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:34:14,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:14,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54211900] [2025-02-07 20:34:14,991 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:34:14,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642597722] [2025-02-07 20:34:14,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642597722] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:34:14,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:34:14,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 20:34:14,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718651553] [2025-02-07 20:34:14,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:34:14,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:34:14,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:14,993 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:34:14,993 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:34:14,993 INFO L87 Difference]: Start difference. First operand 44 states and 62 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), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-07 20:34:15,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:15,051 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2025-02-07 20:34:15,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 20:34:15,051 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), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2025-02-07 20:34:15,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:15,053 INFO L225 Difference]: With dead ends: 65 [2025-02-07 20:34:15,053 INFO L226 Difference]: Without dead ends: 63 [2025-02-07 20:34:15,053 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 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 20:34:15,054 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:15,054 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 135 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:34:15,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2025-02-07 20:34:15,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2025-02-07 20:34:15,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.3125) internal successors, (42), 36 states have internal predecessors, (42), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2025-02-07 20:34:15,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 75 transitions. [2025-02-07 20:34:15,070 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 75 transitions. Word has length 31 [2025-02-07 20:34:15,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:15,070 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 75 transitions. [2025-02-07 20:34:15,070 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), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-07 20:34:15,071 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 75 transitions. [2025-02-07 20:34:15,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-02-07 20:34:15,071 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:15,071 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:15,089 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 20:34:15,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:15,272 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:15,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:15,273 INFO L85 PathProgramCache]: Analyzing trace with hash 781013430, now seen corresponding path program 1 times [2025-02-07 20:34:15,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:15,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805904412] [2025-02-07 20:34:15,273 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:15,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:15,283 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-02-07 20:34:15,298 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-02-07 20:34:15,298 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:15,298 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 20:34:15,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:15,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805904412] [2025-02-07 20:34:15,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805904412] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:15,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624549446] [2025-02-07 20:34:15,454 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:15,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:15,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:15,458 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 20:34:15,462 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 20:34:15,485 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-02-07 20:34:15,497 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-02-07 20:34:15,497 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:15,497 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:15,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-07 20:34:15,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:15,579 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-07 20:34:15,579 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:34:15,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624549446] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:34:15,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-07 20:34:15,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2025-02-07 20:34:15,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478059699] [2025-02-07 20:34:15,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:34:15,580 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:34:15,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:15,580 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:34:15,580 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2025-02-07 20:34:15,581 INFO L87 Difference]: Start difference. First operand 54 states and 75 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (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 20:34:15,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:15,618 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2025-02-07 20:34:15,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 20:34:15,618 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (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 34 [2025-02-07 20:34:15,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:15,619 INFO L225 Difference]: With dead ends: 62 [2025-02-07 20:34:15,619 INFO L226 Difference]: Without dead ends: 58 [2025-02-07 20:34:15,619 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2025-02-07 20:34:15,620 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 9 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:15,620 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 138 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:34:15,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-02-07 20:34:15,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2025-02-07 20:34:15,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 38 states have internal predecessors, (44), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2025-02-07 20:34:15,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 75 transitions. [2025-02-07 20:34:15,626 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 75 transitions. Word has length 34 [2025-02-07 20:34:15,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:15,626 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 75 transitions. [2025-02-07 20:34:15,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (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 20:34:15,627 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 75 transitions. [2025-02-07 20:34:15,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-02-07 20:34:15,627 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:15,627 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:15,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-07 20:34:15,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:15,828 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:15,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:15,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1661765959, now seen corresponding path program 1 times [2025-02-07 20:34:15,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:15,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134193749] [2025-02-07 20:34:15,829 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:15,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:15,837 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-02-07 20:34:15,846 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-02-07 20:34:15,847 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:15,847 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-07 20:34:15,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:15,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134193749] [2025-02-07 20:34:15,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134193749] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:34:15,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:34:15,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 20:34:15,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415692940] [2025-02-07 20:34:15,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:34:15,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:34:15,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:15,888 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:34:15,888 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:34:15,888 INFO L87 Difference]: Start difference. First operand 57 states and 75 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-07 20:34:15,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:15,906 INFO L93 Difference]: Finished difference Result 83 states and 110 transitions. [2025-02-07 20:34:15,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 20:34:15,906 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2025-02-07 20:34:15,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:15,907 INFO L225 Difference]: With dead ends: 83 [2025-02-07 20:34:15,907 INFO L226 Difference]: Without dead ends: 57 [2025-02-07 20:34:15,907 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:34:15,908 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 10 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:15,908 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 98 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:34:15,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2025-02-07 20:34:15,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2025-02-07 20:34:15,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 38 states have internal predecessors, (43), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2025-02-07 20:34:15,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2025-02-07 20:34:15,914 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 34 [2025-02-07 20:34:15,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:15,914 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2025-02-07 20:34:15,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-07 20:34:15,914 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2025-02-07 20:34:15,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-02-07 20:34:15,915 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:15,915 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:15,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-07 20:34:15,915 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:15,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:15,915 INFO L85 PathProgramCache]: Analyzing trace with hash 536628030, now seen corresponding path program 1 times [2025-02-07 20:34:15,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:15,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017946036] [2025-02-07 20:34:15,916 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:15,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:15,920 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-02-07 20:34:15,930 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-02-07 20:34:15,933 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:15,933 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:34:15,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467339286] [2025-02-07 20:34:15,934 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:15,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:15,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:15,942 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 20:34:15,943 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 20:34:15,969 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-02-07 20:34:15,982 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-02-07 20:34:15,982 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:15,982 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:15,983 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-07 20:34:15,984 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:16,094 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 20:34:16,095 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:34:16,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:16,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017946036] [2025-02-07 20:34:16,095 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:34:16,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467339286] [2025-02-07 20:34:16,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467339286] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:34:16,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:34:16,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 20:34:16,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704615872] [2025-02-07 20:34:16,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:34:16,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:34:16,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:16,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:34:16,096 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:34:16,096 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-07 20:34:16,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:16,136 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2025-02-07 20:34:16,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 20:34:16,136 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2025-02-07 20:34:16,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:16,137 INFO L225 Difference]: With dead ends: 64 [2025-02-07 20:34:16,137 INFO L226 Difference]: Without dead ends: 62 [2025-02-07 20:34:16,137 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 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 20:34:16,138 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:16,138 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 126 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:34:16,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-02-07 20:34:16,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2025-02-07 20:34:16,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 41 states have internal predecessors, (46), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2025-02-07 20:34:16,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2025-02-07 20:34:16,144 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 46 [2025-02-07 20:34:16,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:16,145 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2025-02-07 20:34:16,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-07 20:34:16,145 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2025-02-07 20:34:16,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-02-07 20:34:16,145 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:16,145 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 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, 1, 1, 1] [2025-02-07 20:34:16,155 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 20:34:16,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-02-07 20:34:16,347 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:16,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:16,347 INFO L85 PathProgramCache]: Analyzing trace with hash -740965909, now seen corresponding path program 1 times [2025-02-07 20:34:16,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:16,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761687614] [2025-02-07 20:34:16,348 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:16,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:16,352 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-02-07 20:34:16,373 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-02-07 20:34:16,373 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:16,373 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:34:16,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [77966697] [2025-02-07 20:34:16,374 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:16,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:16,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:16,380 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 20:34:16,380 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 20:34:16,405 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-02-07 20:34:16,420 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-02-07 20:34:16,420 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:16,420 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:16,420 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-07 20:34:16,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:16,471 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-02-07 20:34:16,472 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:34:16,546 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-02-07 20:34:16,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:16,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761687614] [2025-02-07 20:34:16,547 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:34:16,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77966697] [2025-02-07 20:34:16,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77966697] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:34:16,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:34:16,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2025-02-07 20:34:16,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811364990] [2025-02-07 20:34:16,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 20:34:16,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-07 20:34:16,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:16,548 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-07 20:34:16,548 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-02-07 20:34:16,548 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-02-07 20:34:16,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:16,626 INFO L93 Difference]: Finished difference Result 91 states and 126 transitions. [2025-02-07 20:34:16,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-07 20:34:16,627 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2025-02-07 20:34:16,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:16,627 INFO L225 Difference]: With dead ends: 91 [2025-02-07 20:34:16,627 INFO L226 Difference]: Without dead ends: 89 [2025-02-07 20:34:16,628 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-02-07 20:34:16,628 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 13 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:16,628 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 156 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:34:16,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2025-02-07 20:34:16,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2025-02-07 20:34:16,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 37 states have internal predecessors, (43), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-02-07 20:34:16,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2025-02-07 20:34:16,645 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 54 [2025-02-07 20:34:16,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:16,647 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2025-02-07 20:34:16,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-02-07 20:34:16,647 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2025-02-07 20:34:16,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-02-07 20:34:16,648 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:16,648 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:16,654 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 20:34:16,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:16,849 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:16,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:16,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1599658939, now seen corresponding path program 1 times [2025-02-07 20:34:16,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:16,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934097823] [2025-02-07 20:34:16,849 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:16,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:16,855 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-02-07 20:34:16,864 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-02-07 20:34:16,865 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:16,865 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-02-07 20:34:16,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:16,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934097823] [2025-02-07 20:34:16,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934097823] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:16,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778820645] [2025-02-07 20:34:16,919 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:16,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:16,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:16,921 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 20:34:16,924 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 20:34:16,946 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-02-07 20:34:16,961 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-02-07 20:34:16,961 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:16,961 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:16,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-07 20:34:16,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-02-07 20:34:17,010 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:34:17,068 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-02-07 20:34:17,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778820645] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:34:17,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:34:17,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 9 [2025-02-07 20:34:17,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744805177] [2025-02-07 20:34:17,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:34:17,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-07 20:34:17,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:17,069 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-07 20:34:17,069 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-02-07 20:34:17,069 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 4 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2025-02-07 20:34:17,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:17,163 INFO L93 Difference]: Finished difference Result 168 states and 197 transitions. [2025-02-07 20:34:17,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-07 20:34:17,163 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 4 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 55 [2025-02-07 20:34:17,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:17,165 INFO L225 Difference]: With dead ends: 168 [2025-02-07 20:34:17,165 INFO L226 Difference]: Without dead ends: 160 [2025-02-07 20:34:17,165 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2025-02-07 20:34:17,165 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 40 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:17,166 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 183 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:34:17,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2025-02-07 20:34:17,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 154. [2025-02-07 20:34:17,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 99 states have (on average 1.1818181818181819) internal successors, (117), 102 states have internal predecessors, (117), 34 states have call successors, (34), 20 states have call predecessors, (34), 20 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2025-02-07 20:34:17,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 182 transitions. [2025-02-07 20:34:17,188 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 182 transitions. Word has length 55 [2025-02-07 20:34:17,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:17,188 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 182 transitions. [2025-02-07 20:34:17,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 4 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2025-02-07 20:34:17,188 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 182 transitions. [2025-02-07 20:34:17,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-02-07 20:34:17,189 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:17,189 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:17,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-07 20:34:17,392 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,SelfDestructingSolverStorable8 [2025-02-07 20:34:17,393 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:17,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:17,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1897660899, now seen corresponding path program 1 times [2025-02-07 20:34:17,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:17,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457537450] [2025-02-07 20:34:17,393 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:17,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:17,397 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-02-07 20:34:17,403 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-02-07 20:34:17,403 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:17,403 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:17,531 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-02-07 20:34:17,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:17,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457537450] [2025-02-07 20:34:17,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457537450] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:17,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023134432] [2025-02-07 20:34:17,532 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:17,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:17,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:17,534 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 20:34:17,542 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 20:34:17,565 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-02-07 20:34:17,581 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-02-07 20:34:17,581 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:17,581 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:17,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-07 20:34:17,584 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-02-07 20:34:17,613 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:34:17,698 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-02-07 20:34:17,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023134432] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:34:17,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:34:17,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2025-02-07 20:34:17,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72604473] [2025-02-07 20:34:17,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:34:17,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-07 20:34:17,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:17,701 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-07 20:34:17,701 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-02-07 20:34:17,701 INFO L87 Difference]: Start difference. First operand 154 states and 182 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2025-02-07 20:34:17,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:17,849 INFO L93 Difference]: Finished difference Result 220 states and 287 transitions. [2025-02-07 20:34:17,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-07 20:34:17,850 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 56 [2025-02-07 20:34:17,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:17,851 INFO L225 Difference]: With dead ends: 220 [2025-02-07 20:34:17,851 INFO L226 Difference]: Without dead ends: 206 [2025-02-07 20:34:17,851 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 107 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2025-02-07 20:34:17,852 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 57 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:17,852 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 248 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:34:17,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2025-02-07 20:34:17,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 184. [2025-02-07 20:34:17,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 120 states have (on average 1.2166666666666666) internal successors, (146), 122 states have internal predecessors, (146), 44 states have call successors, (44), 19 states have call predecessors, (44), 19 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2025-02-07 20:34:17,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2025-02-07 20:34:17,874 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 56 [2025-02-07 20:34:17,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:17,874 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2025-02-07 20:34:17,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2025-02-07 20:34:17,875 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2025-02-07 20:34:17,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-02-07 20:34:17,875 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:17,875 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:17,881 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 20:34:18,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:18,076 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:18,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:18,077 INFO L85 PathProgramCache]: Analyzing trace with hash 113568804, now seen corresponding path program 1 times [2025-02-07 20:34:18,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:18,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890157726] [2025-02-07 20:34:18,077 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:18,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:18,081 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-02-07 20:34:18,085 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-02-07 20:34:18,085 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:18,085 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-02-07 20:34:18,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:18,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890157726] [2025-02-07 20:34:18,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890157726] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:18,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199767843] [2025-02-07 20:34:18,135 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:18,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:18,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:18,136 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 20:34:18,138 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 20:34:18,161 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-02-07 20:34:18,175 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-02-07 20:34:18,175 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:18,175 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:18,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-07 20:34:18,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:18,223 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-02-07 20:34:18,223 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:34:18,295 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-02-07 20:34:18,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199767843] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:34:18,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:34:18,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 9 [2025-02-07 20:34:18,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616217748] [2025-02-07 20:34:18,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:34:18,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-07 20:34:18,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:18,296 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-07 20:34:18,296 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-02-07 20:34:18,297 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 4 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2025-02-07 20:34:18,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:18,389 INFO L93 Difference]: Finished difference Result 264 states and 345 transitions. [2025-02-07 20:34:18,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-07 20:34:18,389 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 4 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 58 [2025-02-07 20:34:18,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:18,390 INFO L225 Difference]: With dead ends: 264 [2025-02-07 20:34:18,390 INFO L226 Difference]: Without dead ends: 192 [2025-02-07 20:34:18,391 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2025-02-07 20:34:18,391 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 39 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:18,391 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 170 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:34:18,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2025-02-07 20:34:18,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2025-02-07 20:34:18,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 128 states have internal predecessors, (149), 44 states have call successors, (44), 19 states have call predecessors, (44), 19 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2025-02-07 20:34:18,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 235 transitions. [2025-02-07 20:34:18,410 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 235 transitions. Word has length 58 [2025-02-07 20:34:18,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:18,410 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 235 transitions. [2025-02-07 20:34:18,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 4 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2025-02-07 20:34:18,410 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 235 transitions. [2025-02-07 20:34:18,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2025-02-07 20:34:18,411 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:18,411 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:18,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-07 20:34:18,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:18,615 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:18,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:18,616 INFO L85 PathProgramCache]: Analyzing trace with hash 935044587, now seen corresponding path program 1 times [2025-02-07 20:34:18,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:18,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382886591] [2025-02-07 20:34:18,616 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:18,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:18,619 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-02-07 20:34:18,626 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-02-07 20:34:18,627 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:18,627 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:34:18,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702160679] [2025-02-07 20:34:18,627 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:18,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:18,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:18,629 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 20:34:18,634 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 20:34:18,659 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-02-07 20:34:18,676 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-02-07 20:34:18,676 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:18,676 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:18,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-07 20:34:18,678 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:18,778 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-02-07 20:34:18,778 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:34:18,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:18,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382886591] [2025-02-07 20:34:18,809 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:34:18,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702160679] [2025-02-07 20:34:18,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702160679] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:18,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-07 20:34:18,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2025-02-07 20:34:18,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846568044] [2025-02-07 20:34:18,810 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-07 20:34:18,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-07 20:34:18,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:18,810 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-07 20:34:18,811 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-02-07 20:34:18,811 INFO L87 Difference]: Start difference. First operand 190 states and 235 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2025-02-07 20:34:18,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:18,888 INFO L93 Difference]: Finished difference Result 222 states and 281 transitions. [2025-02-07 20:34:18,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 20:34:18,888 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 63 [2025-02-07 20:34:18,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:18,889 INFO L225 Difference]: With dead ends: 222 [2025-02-07 20:34:18,889 INFO L226 Difference]: Without dead ends: 218 [2025-02-07 20:34:18,890 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-07 20:34:18,890 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 10 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:18,890 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 208 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:34:18,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2025-02-07 20:34:18,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 216. [2025-02-07 20:34:18,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 142 states have (on average 1.204225352112676) internal successors, (171), 145 states have internal predecessors, (171), 52 states have call successors, (52), 21 states have call predecessors, (52), 21 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2025-02-07 20:34:18,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 272 transitions. [2025-02-07 20:34:18,923 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 272 transitions. Word has length 63 [2025-02-07 20:34:18,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:18,923 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 272 transitions. [2025-02-07 20:34:18,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2025-02-07 20:34:18,923 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 272 transitions. [2025-02-07 20:34:18,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2025-02-07 20:34:18,924 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:18,924 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:18,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-07 20:34:19,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:19,128 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:19,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:19,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1000964517, now seen corresponding path program 2 times [2025-02-07 20:34:19,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:19,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399570693] [2025-02-07 20:34:19,128 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:34:19,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:19,133 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 68 statements into 2 equivalence classes. [2025-02-07 20:34:19,141 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 68 of 68 statements. [2025-02-07 20:34:19,141 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:34:19,141 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:34:19,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1673947961] [2025-02-07 20:34:19,142 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:34:19,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:19,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:19,144 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 20:34:19,145 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 20:34:19,168 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 68 statements into 2 equivalence classes. [2025-02-07 20:34:19,185 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 68 of 68 statements. [2025-02-07 20:34:19,185 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:34:19,185 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:19,189 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-07 20:34:19,191 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:19,338 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-02-07 20:34:19,339 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:34:19,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:19,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399570693] [2025-02-07 20:34:19,400 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:34:19,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673947961] [2025-02-07 20:34:19,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673947961] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:19,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-07 20:34:19,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2025-02-07 20:34:19,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186768001] [2025-02-07 20:34:19,400 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-07 20:34:19,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-07 20:34:19,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:19,401 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-07 20:34:19,401 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-02-07 20:34:19,401 INFO L87 Difference]: Start difference. First operand 216 states and 272 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2025-02-07 20:34:19,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:19,505 INFO L93 Difference]: Finished difference Result 227 states and 282 transitions. [2025-02-07 20:34:19,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-07 20:34:19,506 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 68 [2025-02-07 20:34:19,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:19,507 INFO L225 Difference]: With dead ends: 227 [2025-02-07 20:34:19,507 INFO L226 Difference]: Without dead ends: 225 [2025-02-07 20:34:19,507 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2025-02-07 20:34:19,508 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 16 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:19,508 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 222 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:34:19,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2025-02-07 20:34:19,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2025-02-07 20:34:19,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 148 states have (on average 1.195945945945946) internal successors, (177), 151 states have internal predecessors, (177), 52 states have call successors, (52), 23 states have call predecessors, (52), 23 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2025-02-07 20:34:19,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 278 transitions. [2025-02-07 20:34:19,529 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 278 transitions. Word has length 68 [2025-02-07 20:34:19,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:19,529 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 278 transitions. [2025-02-07 20:34:19,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2025-02-07 20:34:19,529 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 278 transitions. [2025-02-07 20:34:19,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2025-02-07 20:34:19,530 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:19,530 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:19,535 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 20:34:19,733 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,SelfDestructingSolverStorable12 [2025-02-07 20:34:19,734 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:19,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:19,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1573147691, now seen corresponding path program 3 times [2025-02-07 20:34:19,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:19,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118091178] [2025-02-07 20:34:19,734 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:34:19,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:19,739 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 73 statements into 5 equivalence classes. [2025-02-07 20:34:19,774 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 73 of 73 statements. [2025-02-07 20:34:19,775 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-07 20:34:19,775 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:34:19,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193970503] [2025-02-07 20:34:19,777 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:34:19,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:19,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:19,781 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 20:34:19,783 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 20:34:19,810 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 73 statements into 5 equivalence classes. [2025-02-07 20:34:19,825 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 53 of 73 statements. [2025-02-07 20:34:19,825 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-07 20:34:19,825 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:19,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-02-07 20:34:19,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:20,126 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2025-02-07 20:34:20,126 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:34:20,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:20,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118091178] [2025-02-07 20:34:20,345 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:34:20,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193970503] [2025-02-07 20:34:20,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193970503] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:20,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-07 20:34:20,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2025-02-07 20:34:20,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020403741] [2025-02-07 20:34:20,345 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-07 20:34:20,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-07 20:34:20,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:20,346 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-07 20:34:20,346 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2025-02-07 20:34:20,346 INFO L87 Difference]: Start difference. First operand 224 states and 278 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2025-02-07 20:34:20,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:20,553 INFO L93 Difference]: Finished difference Result 235 states and 288 transitions. [2025-02-07 20:34:20,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 20:34:20,553 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 73 [2025-02-07 20:34:20,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:20,554 INFO L225 Difference]: With dead ends: 235 [2025-02-07 20:34:20,554 INFO L226 Difference]: Without dead ends: 231 [2025-02-07 20:34:20,554 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2025-02-07 20:34:20,555 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 26 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:20,555 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 271 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:34:20,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2025-02-07 20:34:20,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2025-02-07 20:34:20,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 153 states have (on average 1.1830065359477124) internal successors, (181), 155 states have internal predecessors, (181), 52 states have call successors, (52), 25 states have call predecessors, (52), 24 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2025-02-07 20:34:20,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 282 transitions. [2025-02-07 20:34:20,573 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 282 transitions. Word has length 73 [2025-02-07 20:34:20,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:20,573 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 282 transitions. [2025-02-07 20:34:20,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2025-02-07 20:34:20,573 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 282 transitions. [2025-02-07 20:34:20,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2025-02-07 20:34:20,574 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:20,574 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:20,580 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 20:34:20,778 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,SelfDestructingSolverStorable13 [2025-02-07 20:34:20,778 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:20,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:20,779 INFO L85 PathProgramCache]: Analyzing trace with hash -92347712, now seen corresponding path program 1 times [2025-02-07 20:34:20,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:20,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896054699] [2025-02-07 20:34:20,779 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:20,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:20,784 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 79 statements into 1 equivalence classes. [2025-02-07 20:34:20,795 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 79 of 79 statements. [2025-02-07 20:34:20,796 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:20,797 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:34:20,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1142745539] [2025-02-07 20:34:20,797 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:20,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:20,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:20,803 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 20:34:20,804 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 20:34:20,831 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 79 statements into 1 equivalence classes. [2025-02-07 20:34:20,849 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 79 of 79 statements. [2025-02-07 20:34:20,849 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:20,850 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:20,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-02-07 20:34:20,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:21,316 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2025-02-07 20:34:21,317 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:34:21,642 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2025-02-07 20:34:21,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:21,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896054699] [2025-02-07 20:34:21,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:34:21,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142745539] [2025-02-07 20:34:21,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142745539] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:34:21,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:34:21,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2025-02-07 20:34:21,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362956627] [2025-02-07 20:34:21,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 20:34:21,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-07 20:34:21,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:21,643 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-07 20:34:21,644 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2025-02-07 20:34:21,644 INFO L87 Difference]: Start difference. First operand 230 states and 282 transitions. Second operand has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2025-02-07 20:34:23,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:23,550 INFO L93 Difference]: Finished difference Result 383 states and 537 transitions. [2025-02-07 20:34:23,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-02-07 20:34:23,550 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 79 [2025-02-07 20:34:23,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:23,552 INFO L225 Difference]: With dead ends: 383 [2025-02-07 20:34:23,552 INFO L226 Difference]: Without dead ends: 377 [2025-02-07 20:34:23,553 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2025-02-07 20:34:23,553 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 131 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:23,553 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 686 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-02-07 20:34:23,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2025-02-07 20:34:23,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 338. [2025-02-07 20:34:23,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 212 states have (on average 1.2830188679245282) internal successors, (272), 215 states have internal predecessors, (272), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (98), 97 states have call predecessors, (98), 98 states have call successors, (98) [2025-02-07 20:34:23,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 470 transitions. [2025-02-07 20:34:23,596 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 470 transitions. Word has length 79 [2025-02-07 20:34:23,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:23,597 INFO L471 AbstractCegarLoop]: Abstraction has 338 states and 470 transitions. [2025-02-07 20:34:23,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2025-02-07 20:34:23,597 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 470 transitions. [2025-02-07 20:34:23,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2025-02-07 20:34:23,597 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:23,598 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:23,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-07 20:34:23,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:23,798 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:23,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:23,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1736584487, now seen corresponding path program 1 times [2025-02-07 20:34:23,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:23,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622530080] [2025-02-07 20:34:23,799 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:23,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:23,803 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 88 statements into 1 equivalence classes. [2025-02-07 20:34:23,808 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 88 of 88 statements. [2025-02-07 20:34:23,808 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:23,808 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:23,854 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2025-02-07 20:34:23,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:23,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622530080] [2025-02-07 20:34:23,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622530080] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:34:23,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:34:23,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 20:34:23,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407994007] [2025-02-07 20:34:23,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:34:23,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:34:23,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:23,855 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:34:23,855 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:34:23,856 INFO L87 Difference]: Start difference. First operand 338 states and 470 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2025-02-07 20:34:24,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:24,002 INFO L93 Difference]: Finished difference Result 534 states and 788 transitions. [2025-02-07 20:34:24,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 20:34:24,003 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 88 [2025-02-07 20:34:24,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:24,005 INFO L225 Difference]: With dead ends: 534 [2025-02-07 20:34:24,005 INFO L226 Difference]: Without dead ends: 415 [2025-02-07 20:34:24,006 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-02-07 20:34:24,006 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 11 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:24,006 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 169 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:34:24,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2025-02-07 20:34:24,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 363. [2025-02-07 20:34:24,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 229 states have (on average 1.2838427947598254) internal successors, (294), 232 states have internal predecessors, (294), 108 states have call successors, (108), 25 states have call predecessors, (108), 25 states have return successors, (106), 105 states have call predecessors, (106), 106 states have call successors, (106) [2025-02-07 20:34:24,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 508 transitions. [2025-02-07 20:34:24,056 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 508 transitions. Word has length 88 [2025-02-07 20:34:24,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:24,056 INFO L471 AbstractCegarLoop]: Abstraction has 363 states and 508 transitions. [2025-02-07 20:34:24,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2025-02-07 20:34:24,056 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 508 transitions. [2025-02-07 20:34:24,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2025-02-07 20:34:24,057 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:24,057 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:24,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-02-07 20:34:24,057 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:24,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:24,057 INFO L85 PathProgramCache]: Analyzing trace with hash -596793106, now seen corresponding path program 1 times [2025-02-07 20:34:24,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:24,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492006425] [2025-02-07 20:34:24,058 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:24,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:24,061 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 96 statements into 1 equivalence classes. [2025-02-07 20:34:24,070 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 96 of 96 statements. [2025-02-07 20:34:24,071 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:24,071 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:34:24,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942331735] [2025-02-07 20:34:24,071 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:24,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:24,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:24,073 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 20:34:24,074 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 20:34:24,099 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 96 statements into 1 equivalence classes. [2025-02-07 20:34:24,121 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 96 of 96 statements. [2025-02-07 20:34:24,121 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:24,121 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:24,122 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-02-07 20:34:24,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:24,878 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 68 proven. 39 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2025-02-07 20:34:24,878 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:35:01,957 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 68 proven. 30 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2025-02-07 20:35:01,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:35:01,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492006425] [2025-02-07 20:35:01,957 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:35:01,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942331735] [2025-02-07 20:35:01,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942331735] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:35:01,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:35:01,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2025-02-07 20:35:01,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466134124] [2025-02-07 20:35:01,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 20:35:01,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-07 20:35:01,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:35:01,959 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-07 20:35:01,959 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=538, Unknown=1, NotChecked=0, Total=650 [2025-02-07 20:35:01,959 INFO L87 Difference]: Start difference. First operand 363 states and 508 transitions. Second operand has 26 states, 25 states have (on average 2.08) internal successors, (52), 21 states have internal predecessors, (52), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 13 states have call predecessors, (30), 10 states have call successors, (30) [2025-02-07 20:35:06,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-07 20:35:20,765 WARN L286 SmtUtils]: Spent 5.42s on a formula simplification. DAG size of input: 60 DAG size of output: 59 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-02-07 20:35:34,490 WARN L286 SmtUtils]: Spent 12.54s on a formula simplification. DAG size of input: 69 DAG size of output: 68 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-02-07 20:35:47,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-07 20:35:53,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []