./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound1.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 1009b309b84d3a678e4f12db10e873a2b96e065352111c00074b04d416cca18d --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 15:02:02,566 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 15:02:02,625 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 15:02:02,632 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 15:02:02,633 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 15:02:02,655 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 15:02:02,656 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 15:02:02,656 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 15:02:02,657 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 15:02:02,657 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 15:02:02,658 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 15:02:02,658 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 15:02:02,658 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 15:02:02,658 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 15:02:02,658 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 15:02:02,659 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 15:02:02,659 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 15:02:02,659 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 15:02:02,659 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 15:02:02,659 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 15:02:02,659 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 15:02:02,659 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 15:02:02,659 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 15:02:02,660 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 15:02:02,660 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 15:02:02,660 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 15:02:02,660 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 15:02:02,660 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 15:02:02,660 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 15:02:02,660 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 15:02:02,660 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 15:02:02,660 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 15:02:02,661 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:02:02,661 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 15:02:02,661 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 15:02:02,661 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 15:02:02,661 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 15:02:02,661 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 15:02:02,661 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 15:02:02,661 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 15:02:02,661 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 15:02:02,661 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 15:02:02,662 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 15:02:02,662 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 -> 1009b309b84d3a678e4f12db10e873a2b96e065352111c00074b04d416cca18d [2025-02-05 15:02:03,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 15:02:03,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 15:02:03,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 15:02:03,108 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 15:02:03,108 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 15:02:03,109 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound1.c [2025-02-05 15:02:04,299 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/178b65765/882b2e66396146fd99f0d538434cf15e/FLAGb46065683 [2025-02-05 15:02:04,521 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 15:02:04,522 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound1.c [2025-02-05 15:02:04,552 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/178b65765/882b2e66396146fd99f0d538434cf15e/FLAGb46065683 [2025-02-05 15:02:04,563 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/178b65765/882b2e66396146fd99f0d538434cf15e [2025-02-05 15:02:04,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 15:02:04,568 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 15:02:04,569 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 15:02:04,569 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 15:02:04,572 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 15:02:04,572 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:02:04" (1/1) ... [2025-02-05 15:02:04,573 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ad48ae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:02:04, skipping insertion in model container [2025-02-05 15:02:04,574 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:02:04" (1/1) ... [2025-02-05 15:02:04,584 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 15:02:04,694 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/cohencu-ll_valuebound1.c[588,601] [2025-02-05 15:02:04,709 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:02:04,716 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 15:02:04,724 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/cohencu-ll_valuebound1.c[588,601] [2025-02-05 15:02:04,733 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:02:04,745 INFO L204 MainTranslator]: Completed translation [2025-02-05 15:02:04,746 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:02:04 WrapperNode [2025-02-05 15:02:04,746 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 15:02:04,747 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 15:02:04,747 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 15:02:04,747 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 15:02:04,751 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:02:04" (1/1) ... [2025-02-05 15:02:04,758 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:02:04" (1/1) ... [2025-02-05 15:02:04,770 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 45 [2025-02-05 15:02:04,771 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 15:02:04,772 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 15:02:04,772 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 15:02:04,772 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 15:02:04,777 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:02:04" (1/1) ... [2025-02-05 15:02:04,777 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:02:04" (1/1) ... [2025-02-05 15:02:04,778 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:02:04" (1/1) ... [2025-02-05 15:02:04,787 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-05 15:02:04,791 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:02:04" (1/1) ... [2025-02-05 15:02:04,791 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:02:04" (1/1) ... [2025-02-05 15:02:04,792 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:02:04" (1/1) ... [2025-02-05 15:02:04,793 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:02:04" (1/1) ... [2025-02-05 15:02:04,793 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:02:04" (1/1) ... [2025-02-05 15:02:04,793 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:02:04" (1/1) ... [2025-02-05 15:02:04,794 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 15:02:04,797 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 15:02:04,797 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 15:02:04,797 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 15:02:04,798 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:02:04" (1/1) ... [2025-02-05 15:02:04,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:02:04,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:02:04,826 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-05 15:02:04,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-05 15:02:04,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 15:02:04,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 15:02:04,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 15:02:04,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 15:02:04,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-05 15:02:04,858 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-05 15:02:04,901 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 15:02:04,903 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 15:02:05,014 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-02-05 15:02:05,015 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 15:02:05,022 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 15:02:05,022 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 15:02:05,022 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:02:05 BoogieIcfgContainer [2025-02-05 15:02:05,022 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 15:02:05,024 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 15:02:05,024 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 15:02:05,027 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 15:02:05,027 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 03:02:04" (1/3) ... [2025-02-05 15:02:05,027 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c0e037d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:02:05, skipping insertion in model container [2025-02-05 15:02:05,028 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:02:04" (2/3) ... [2025-02-05 15:02:05,028 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c0e037d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:02:05, skipping insertion in model container [2025-02-05 15:02:05,028 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:02:05" (3/3) ... [2025-02-05 15:02:05,028 INFO L128 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound1.c [2025-02-05 15:02:05,038 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 15:02:05,039 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG cohencu-ll_valuebound1.c that has 2 procedures, 27 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-02-05 15:02:05,072 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 15:02:05,079 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;@2f448e36, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 15:02:05,079 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 15:02:05,081 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2025-02-05 15:02:05,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-05 15:02:05,084 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:02:05,085 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:02:05,085 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:02:05,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:02:05,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1442289540, now seen corresponding path program 1 times [2025-02-05 15:02:05,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:02:05,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929250903] [2025-02-05 15:02:05,093 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:02:05,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:02:05,138 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-05 15:02:05,161 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-05 15:02:05,164 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:02:05,164 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:02:05,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 15:02:05,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:02:05,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929250903] [2025-02-05 15:02:05,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929250903] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:02:05,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:02:05,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-05 15:02:05,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782376359] [2025-02-05 15:02:05,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:02:05,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-05 15:02:05,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:02:05,208 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-05 15:02:05,209 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-05 15:02:05,210 INFO L87 Difference]: Start difference. First operand has 27 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 15:02:05,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:02:05,222 INFO L93 Difference]: Finished difference Result 51 states and 87 transitions. [2025-02-05 15:02:05,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-05 15:02:05,223 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-02-05 15:02:05,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:02:05,227 INFO L225 Difference]: With dead ends: 51 [2025-02-05 15:02:05,227 INFO L226 Difference]: Without dead ends: 23 [2025-02-05 15:02:05,229 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 [2025-02-05 15:02:05,231 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:02:05,231 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:02:05,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-02-05 15:02:05,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2025-02-05 15:02:05,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-02-05 15:02:05,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 33 transitions. [2025-02-05 15:02:05,253 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 33 transitions. Word has length 9 [2025-02-05 15:02:05,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:02:05,253 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 33 transitions. [2025-02-05 15:02:05,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 15:02:05,253 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 33 transitions. [2025-02-05 15:02:05,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-05 15:02:05,254 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:02:05,254 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:02:05,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 15:02:05,254 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:02:05,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:02:05,255 INFO L85 PathProgramCache]: Analyzing trace with hash -554785859, now seen corresponding path program 1 times [2025-02-05 15:02:05,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:02:05,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752130228] [2025-02-05 15:02:05,255 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:02:05,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:02:05,260 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-05 15:02:05,271 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-05 15:02:05,271 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:02:05,271 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:02:05,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 15:02:05,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:02:05,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752130228] [2025-02-05 15:02:05,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752130228] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:02:05,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:02:05,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:02:05,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604812597] [2025-02-05 15:02:05,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:02:05,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:02:05,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:02:05,464 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:02:05,465 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:02:05,465 INFO L87 Difference]: Start difference. First operand 23 states and 33 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 15:02:05,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:02:05,540 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2025-02-05 15:02:05,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:02:05,540 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-02-05 15:02:05,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:02:05,541 INFO L225 Difference]: With dead ends: 29 [2025-02-05 15:02:05,541 INFO L226 Difference]: Without dead ends: 27 [2025-02-05 15:02:05,541 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-05 15:02:05,542 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:02:05,542 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 86 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:02:05,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-02-05 15:02:05,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2025-02-05 15:02:05,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-02-05 15:02:05,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2025-02-05 15:02:05,550 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 9 [2025-02-05 15:02:05,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:02:05,550 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2025-02-05 15:02:05,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 15:02:05,550 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2025-02-05 15:02:05,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-02-05 15:02:05,550 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:02:05,550 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:02:05,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-05 15:02:05,550 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:02:05,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:02:05,551 INFO L85 PathProgramCache]: Analyzing trace with hash -318843776, now seen corresponding path program 1 times [2025-02-05 15:02:05,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:02:05,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383416404] [2025-02-05 15:02:05,551 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:02:05,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:02:05,555 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-05 15:02:05,561 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-05 15:02:05,561 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:02:05,561 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:02:05,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021637175] [2025-02-05 15:02:05,563 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:02:05,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:02:05,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:02:05,566 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:02:05,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-05 15:02:05,589 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-05 15:02:05,598 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-05 15:02:05,598 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:02:05,598 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:02:05,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-05 15:02:05,606 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:02:05,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 15:02:05,660 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 15:02:05,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:02:05,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383416404] [2025-02-05 15:02:05,661 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:02:05,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021637175] [2025-02-05 15:02:05,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021637175] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:02:05,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:02:05,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:02:05,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442204968] [2025-02-05 15:02:05,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:02:05,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:02:05,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:02:05,663 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:02:05,663 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:02:05,664 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 15:02:05,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:02:05,716 INFO L93 Difference]: Finished difference Result 46 states and 65 transitions. [2025-02-05 15:02:05,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:02:05,716 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2025-02-05 15:02:05,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:02:05,717 INFO L225 Difference]: With dead ends: 46 [2025-02-05 15:02:05,717 INFO L226 Difference]: Without dead ends: 44 [2025-02-05 15:02:05,717 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-05 15:02:05,718 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:02:05,718 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 107 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:02:05,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-02-05 15:02:05,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2025-02-05 15:02:05,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 19 states have internal predecessors, (19), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2025-02-05 15:02:05,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2025-02-05 15:02:05,752 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 14 [2025-02-05 15:02:05,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:02:05,753 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2025-02-05 15:02:05,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 15:02:05,753 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2025-02-05 15:02:05,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-05 15:02:05,753 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:02:05,753 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:02:05,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-05 15:02:05,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:02:05,957 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:02:05,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:02:05,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1580240349, now seen corresponding path program 1 times [2025-02-05 15:02:05,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:02:05,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490450157] [2025-02-05 15:02:05,958 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:02:05,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:02:05,962 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-05 15:02:05,967 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-05 15:02:05,967 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:02:05,967 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:02:05,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307140383] [2025-02-05 15:02:05,968 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:02:05,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:02:05,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:02:05,970 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:02:05,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-05 15:02:05,992 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-05 15:02:06,000 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-05 15:02:06,000 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:02:06,000 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:02:06,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-05 15:02:06,002 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:02:06,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 15:02:06,044 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 15:02:06,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:02:06,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490450157] [2025-02-05 15:02:06,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:02:06,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307140383] [2025-02-05 15:02:06,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307140383] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:02:06,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:02:06,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:02:06,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610223532] [2025-02-05 15:02:06,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:02:06,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:02:06,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:02:06,045 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:02:06,046 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:02:06,046 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 15:02:06,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:02:06,116 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2025-02-05 15:02:06,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:02:06,116 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2025-02-05 15:02:06,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:02:06,117 INFO L225 Difference]: With dead ends: 50 [2025-02-05 15:02:06,117 INFO L226 Difference]: Without dead ends: 48 [2025-02-05 15:02:06,118 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-05 15:02:06,120 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 4 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:02:06,120 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 104 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:02:06,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-02-05 15:02:06,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2025-02-05 15:02:06,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2025-02-05 15:02:06,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 59 transitions. [2025-02-05 15:02:06,135 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 59 transitions. Word has length 19 [2025-02-05 15:02:06,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:02:06,136 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 59 transitions. [2025-02-05 15:02:06,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 15:02:06,136 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 59 transitions. [2025-02-05 15:02:06,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-02-05 15:02:06,137 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:02:06,137 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:02:06,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-05 15:02:06,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:02:06,342 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:02:06,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:02:06,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1388318432, now seen corresponding path program 1 times [2025-02-05 15:02:06,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:02:06,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069368359] [2025-02-05 15:02:06,343 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:02:06,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:02:06,349 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-05 15:02:06,362 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-05 15:02:06,363 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:02:06,363 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:02:06,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312601676] [2025-02-05 15:02:06,365 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:02:06,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:02:06,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:02:06,371 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:02:06,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-05 15:02:06,400 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-05 15:02:06,409 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-05 15:02:06,409 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:02:06,409 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:02:06,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-05 15:02:06,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:02:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 15:02:06,471 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 15:02:06,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:02:06,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069368359] [2025-02-05 15:02:06,471 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:02:06,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312601676] [2025-02-05 15:02:06,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312601676] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:02:06,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:02:06,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:02:06,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115561436] [2025-02-05 15:02:06,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:02:06,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:02:06,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:02:06,472 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:02:06,472 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:02:06,473 INFO L87 Difference]: Start difference. First operand 44 states and 59 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-02-05 15:02:06,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:02:06,531 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2025-02-05 15:02:06,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:02:06,532 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2025-02-05 15:02:06,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:02:06,532 INFO L225 Difference]: With dead ends: 58 [2025-02-05 15:02:06,533 INFO L226 Difference]: Without dead ends: 46 [2025-02-05 15:02:06,533 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-05 15:02:06,534 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:02:06,534 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 96 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:02:06,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-02-05 15:02:06,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2025-02-05 15:02:06,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2025-02-05 15:02:06,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2025-02-05 15:02:06,549 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 24 [2025-02-05 15:02:06,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:02:06,549 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2025-02-05 15:02:06,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-02-05 15:02:06,549 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2025-02-05 15:02:06,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-02-05 15:02:06,550 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:02:06,550 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:02:06,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-05 15:02:06,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:02:06,751 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:02:06,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:02:06,752 INFO L85 PathProgramCache]: Analyzing trace with hash -175201439, now seen corresponding path program 1 times [2025-02-05 15:02:06,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:02:06,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939917387] [2025-02-05 15:02:06,752 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:02:06,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:02:06,758 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-02-05 15:02:06,775 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-02-05 15:02:06,775 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:02:06,775 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:02:06,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [802754670] [2025-02-05 15:02:06,776 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:02:06,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:02:06,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:02:06,779 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:02:06,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-05 15:02:06,801 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-02-05 15:02:06,814 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-02-05 15:02:06,814 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:02:06,814 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:02:06,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-05 15:02:06,816 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:02:06,901 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-05 15:02:06,901 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:02:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-05 15:02:07,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:02:07,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939917387] [2025-02-05 15:02:07,039 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:02:07,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802754670] [2025-02-05 15:02:07,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802754670] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:02:07,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:02:07,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2025-02-05 15:02:07,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979939182] [2025-02-05 15:02:07,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:02:07,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-05 15:02:07,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:02:07,040 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-05 15:02:07,041 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2025-02-05 15:02:07,041 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2025-02-05 15:02:07,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:02:07,245 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2025-02-05 15:02:07,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 15:02:07,246 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 41 [2025-02-05 15:02:07,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:02:07,248 INFO L225 Difference]: With dead ends: 69 [2025-02-05 15:02:07,248 INFO L226 Difference]: Without dead ends: 67 [2025-02-05 15:02:07,248 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2025-02-05 15:02:07,249 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:02:07,249 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 153 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:02:07,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2025-02-05 15:02:07,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 54. [2025-02-05 15:02:07,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2025-02-05 15:02:07,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2025-02-05 15:02:07,270 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 41 [2025-02-05 15:02:07,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:02:07,270 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2025-02-05 15:02:07,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2025-02-05 15:02:07,271 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2025-02-05 15:02:07,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-02-05 15:02:07,272 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:02:07,272 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:02:07,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-05 15:02:07,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-02-05 15:02:07,473 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:02:07,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:02:07,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1564730268, now seen corresponding path program 2 times [2025-02-05 15:02:07,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:02:07,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117454088] [2025-02-05 15:02:07,474 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:02:07,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:02:07,486 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 46 statements into 2 equivalence classes. [2025-02-05 15:02:07,508 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 46 of 46 statements. [2025-02-05 15:02:07,509 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:02:07,509 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:02:07,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1266609297] [2025-02-05 15:02:07,513 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:02:07,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:02:07,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:02:07,516 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:02:07,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-05 15:02:07,542 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 46 statements into 2 equivalence classes. [2025-02-05 15:02:07,559 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 46 of 46 statements. [2025-02-05 15:02:07,559 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:02:07,559 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:02:07,560 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-05 15:02:07,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:02:07,692 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-05 15:02:07,695 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:02:07,832 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-05 15:02:07,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:02:07,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117454088] [2025-02-05 15:02:07,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:02:07,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266609297] [2025-02-05 15:02:07,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266609297] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:02:07,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:02:07,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2025-02-05 15:02:07,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785964926] [2025-02-05 15:02:07,834 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:02:07,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-05 15:02:07,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:02:07,835 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-05 15:02:07,835 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2025-02-05 15:02:07,836 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2025-02-05 15:02:12,031 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 [] [2025-02-05 15:02:12,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:02:12,079 INFO L93 Difference]: Finished difference Result 84 states and 103 transitions. [2025-02-05 15:02:12,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-05 15:02:12,080 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 46 [2025-02-05 15:02:12,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:02:12,084 INFO L225 Difference]: With dead ends: 84 [2025-02-05 15:02:12,084 INFO L226 Difference]: Without dead ends: 82 [2025-02-05 15:02:12,084 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2025-02-05 15:02:12,085 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 53 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:02:12,085 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 128 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 152 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2025-02-05 15:02:12,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-02-05 15:02:12,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2025-02-05 15:02:12,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 45 states have internal predecessors, (45), 27 states have call successors, (27), 10 states have call predecessors, (27), 10 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2025-02-05 15:02:12,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2025-02-05 15:02:12,123 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 46 [2025-02-05 15:02:12,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:02:12,124 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2025-02-05 15:02:12,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2025-02-05 15:02:12,125 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2025-02-05 15:02:12,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-02-05 15:02:12,125 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:02:12,125 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:02:12,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-05 15:02:12,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:02:12,327 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:02:12,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:02:12,328 INFO L85 PathProgramCache]: Analyzing trace with hash 426211457, now seen corresponding path program 3 times [2025-02-05 15:02:12,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:02:12,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343541245] [2025-02-05 15:02:12,328 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:02:12,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:02:12,336 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 51 statements into 6 equivalence classes. [2025-02-05 15:02:12,371 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 51 of 51 statements. [2025-02-05 15:02:12,371 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-05 15:02:12,371 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:02:12,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036452225] [2025-02-05 15:02:12,372 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:02:12,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:02:12,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:02:12,379 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:02:12,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-05 15:02:12,405 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 51 statements into 6 equivalence classes. [2025-02-05 15:02:12,417 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 51 statements. [2025-02-05 15:02:12,417 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-05 15:02:12,417 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:02:12,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-05 15:02:12,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:02:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2025-02-05 15:02:12,536 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:02:12,651 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2025-02-05 15:02:12,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:02:12,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343541245] [2025-02-05 15:02:12,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:02:12,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036452225] [2025-02-05 15:02:12,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036452225] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:02:12,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:02:12,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2025-02-05 15:02:12,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820712159] [2025-02-05 15:02:12,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:02:12,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-05 15:02:12,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:02:12,654 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-05 15:02:12,654 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2025-02-05 15:02:12,654 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2025-02-05 15:02:12,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:02:12,909 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2025-02-05 15:02:12,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-05 15:02:12,909 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 51 [2025-02-05 15:02:12,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:02:12,914 INFO L225 Difference]: With dead ends: 96 [2025-02-05 15:02:12,914 INFO L226 Difference]: Without dead ends: 84 [2025-02-05 15:02:12,915 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2025-02-05 15:02:12,915 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:02:12,915 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 200 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:02:12,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-02-05 15:02:12,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 67. [2025-02-05 15:02:12,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 43 states have internal predecessors, (44), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2025-02-05 15:02:12,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2025-02-05 15:02:12,939 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 51 [2025-02-05 15:02:12,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:02:12,939 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2025-02-05 15:02:12,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2025-02-05 15:02:12,940 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2025-02-05 15:02:12,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2025-02-05 15:02:12,940 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:02:12,940 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:02:12,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-05 15:02:13,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-02-05 15:02:13,141 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:02:13,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:02:13,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1799023150, now seen corresponding path program 1 times [2025-02-05 15:02:13,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:02:13,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983507939] [2025-02-05 15:02:13,142 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:02:13,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:02:13,147 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 67 statements into 1 equivalence classes. [2025-02-05 15:02:13,169 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 67 of 67 statements. [2025-02-05 15:02:13,169 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:02:13,169 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:02:13,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [308515843] [2025-02-05 15:02:13,173 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:02:13,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:02:13,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:02:13,179 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:02:13,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-05 15:02:13,204 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 67 statements into 1 equivalence classes. [2025-02-05 15:02:13,226 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 67 of 67 statements. [2025-02-05 15:02:13,226 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:02:13,226 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:02:13,227 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-05 15:02:13,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:02:13,386 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-02-05 15:02:13,387 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:02:13,561 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-02-05 15:02:13,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:02:13,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983507939] [2025-02-05 15:02:13,562 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:02:13,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308515843] [2025-02-05 15:02:13,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308515843] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:02:13,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:02:13,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2025-02-05 15:02:13,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077105866] [2025-02-05 15:02:13,562 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:02:13,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 15:02:13,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:02:13,564 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 15:02:13,564 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2025-02-05 15:02:13,564 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2025-02-05 15:02:13,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:02:13,739 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2025-02-05 15:02:13,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 15:02:13,739 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 67 [2025-02-05 15:02:13,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:02:13,741 INFO L225 Difference]: With dead ends: 97 [2025-02-05 15:02:13,741 INFO L226 Difference]: Without dead ends: 95 [2025-02-05 15:02:13,741 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2025-02-05 15:02:13,742 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 5 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:02:13,742 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 195 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:02:13,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2025-02-05 15:02:13,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2025-02-05 15:02:13,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 54 states have internal predecessors, (56), 25 states have call successors, (25), 13 states have call predecessors, (25), 13 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2025-02-05 15:02:13,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 105 transitions. [2025-02-05 15:02:13,771 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 105 transitions. Word has length 67 [2025-02-05 15:02:13,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:02:13,772 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 105 transitions. [2025-02-05 15:02:13,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2025-02-05 15:02:13,772 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 105 transitions. [2025-02-05 15:02:13,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2025-02-05 15:02:13,774 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:02:13,774 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:02:13,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-05 15:02:13,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:02:13,975 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:02:13,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:02:13,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1670602287, now seen corresponding path program 1 times [2025-02-05 15:02:13,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:02:13,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736960440] [2025-02-05 15:02:13,976 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:02:13,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:02:13,981 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 72 statements into 1 equivalence classes. [2025-02-05 15:02:13,993 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 72 of 72 statements. [2025-02-05 15:02:13,993 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:02:13,993 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:02:13,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2133410993] [2025-02-05 15:02:13,994 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:02:13,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:02:13,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:02:13,996 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:02:13,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-05 15:02:14,019 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 72 statements into 1 equivalence classes. [2025-02-05 15:02:14,035 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 72 of 72 statements. [2025-02-05 15:02:14,035 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:02:14,035 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:02:14,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-05 15:02:14,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:02:14,178 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2025-02-05 15:02:14,178 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:02:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2025-02-05 15:02:14,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:02:14,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736960440] [2025-02-05 15:02:14,303 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:02:14,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133410993] [2025-02-05 15:02:14,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133410993] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:02:14,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:02:14,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2025-02-05 15:02:14,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379414613] [2025-02-05 15:02:14,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:02:14,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 15:02:14,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:02:14,305 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 15:02:14,305 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2025-02-05 15:02:14,305 INFO L87 Difference]: Start difference. First operand 91 states and 105 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2025-02-05 15:02:14,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:02:14,574 INFO L93 Difference]: Finished difference Result 127 states and 146 transitions. [2025-02-05 15:02:14,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-05 15:02:14,575 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 72 [2025-02-05 15:02:14,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:02:14,577 INFO L225 Difference]: With dead ends: 127 [2025-02-05 15:02:14,577 INFO L226 Difference]: Without dead ends: 106 [2025-02-05 15:02:14,577 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2025-02-05 15:02:14,578 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:02:14,578 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 187 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:02:14,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2025-02-05 15:02:14,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2025-02-05 15:02:14,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 60 states have (on average 1.05) internal successors, (63), 62 states have internal predecessors, (63), 30 states have call successors, (30), 15 states have call predecessors, (30), 15 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2025-02-05 15:02:14,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 121 transitions. [2025-02-05 15:02:14,608 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 121 transitions. Word has length 72 [2025-02-05 15:02:14,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:02:14,609 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 121 transitions. [2025-02-05 15:02:14,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2025-02-05 15:02:14,609 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 121 transitions. [2025-02-05 15:02:14,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2025-02-05 15:02:14,611 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:02:14,612 INFO L218 NwaCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:02:14,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-05 15:02:14,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:02:14,812 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:02:14,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:02:14,813 INFO L85 PathProgramCache]: Analyzing trace with hash 813861582, now seen corresponding path program 2 times [2025-02-05 15:02:14,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:02:14,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296583968] [2025-02-05 15:02:14,813 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:02:14,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:02:14,822 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 121 statements into 2 equivalence classes. [2025-02-05 15:02:14,851 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 121 of 121 statements. [2025-02-05 15:02:14,851 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:02:14,851 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:02:15,066 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 70 proven. 14 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2025-02-05 15:02:15,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:02:15,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296583968] [2025-02-05 15:02:15,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296583968] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:02:15,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047206479] [2025-02-05 15:02:15,067 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:02:15,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:02:15,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:02:15,070 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:02:15,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-05 15:02:15,115 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 121 statements into 2 equivalence classes. [2025-02-05 15:02:15,140 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 121 of 121 statements. [2025-02-05 15:02:15,140 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:02:15,140 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:02:15,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-05 15:02:15,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:02:15,327 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 432 proven. 0 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2025-02-05 15:02:15,328 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 15:02:15,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047206479] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:02:15,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:02:15,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2025-02-05 15:02:15,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678544005] [2025-02-05 15:02:15,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:02:15,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 15:02:15,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:02:15,329 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 15:02:15,329 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2025-02-05 15:02:15,329 INFO L87 Difference]: Start difference. First operand 106 states and 121 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2025-02-05 15:02:15,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:02:15,383 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2025-02-05 15:02:15,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-05 15:02:15,383 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 121 [2025-02-05 15:02:15,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:02:15,384 INFO L225 Difference]: With dead ends: 126 [2025-02-05 15:02:15,384 INFO L226 Difference]: Without dead ends: 0 [2025-02-05 15:02:15,384 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2025-02-05 15:02:15,384 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:02:15,385 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 120 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:02:15,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-02-05 15:02:15,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-02-05 15:02:15,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 15:02:15,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-02-05 15:02:15,385 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 121 [2025-02-05 15:02:15,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:02:15,385 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-02-05 15:02:15,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2025-02-05 15:02:15,385 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-02-05 15:02:15,385 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-02-05 15:02:15,389 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-02-05 15:02:15,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-05 15:02:15,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:02:15,596 INFO L422 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1] [2025-02-05 15:02:15,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-02-05 15:02:25,600 WARN L286 SmtUtils]: Spent 8.73s on a formula simplification. DAG size of input: 84 DAG size of output: 56 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2025-02-05 15:02:34,721 WARN L286 SmtUtils]: Spent 8.24s on a formula simplification. DAG size of input: 84 DAG size of output: 56 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2025-02-05 15:02:43,191 WARN L286 SmtUtils]: Spent 8.47s on a formula simplification. DAG size of input: 84 DAG size of output: 56 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2025-02-05 15:02:43,491 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-05 15:02:43,515 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.02 03:02:43 BoogieIcfgContainer [2025-02-05 15:02:43,515 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-05 15:02:43,515 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-05 15:02:43,515 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-05 15:02:43,515 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-05 15:02:43,516 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:02:05" (3/4) ... [2025-02-05 15:02:43,517 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-02-05 15:02:43,521 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2025-02-05 15:02:43,529 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2025-02-05 15:02:43,529 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2025-02-05 15:02:43,529 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-02-05 15:02:43,530 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-02-05 15:02:43,639 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-02-05 15:02:43,639 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.yml [2025-02-05 15:02:43,639 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-05 15:02:43,641 INFO L158 Benchmark]: Toolchain (without parser) took 39072.14ms. Allocated memory was 142.6MB in the beginning and 411.0MB in the end (delta: 268.4MB). Free memory was 114.8MB in the beginning and 349.7MB in the end (delta: -234.9MB). Peak memory consumption was 27.4MB. Max. memory is 16.1GB. [2025-02-05 15:02:43,642 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 201.3MB. Free memory is still 122.7MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-05 15:02:43,642 INFO L158 Benchmark]: CACSL2BoogieTranslator took 177.68ms. Allocated memory is still 142.6MB. Free memory was 114.8MB in the beginning and 103.6MB in the end (delta: 11.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-05 15:02:43,642 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.64ms. Allocated memory is still 142.6MB. Free memory was 103.1MB in the beginning and 102.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-05 15:02:43,642 INFO L158 Benchmark]: Boogie Preprocessor took 22.33ms. Allocated memory is still 142.6MB. Free memory was 102.1MB in the beginning and 101.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-05 15:02:43,643 INFO L158 Benchmark]: IcfgBuilder took 225.47ms. Allocated memory is still 142.6MB. Free memory was 101.1MB in the beginning and 88.9MB in the end (delta: 12.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-05 15:02:43,643 INFO L158 Benchmark]: TraceAbstraction took 38490.75ms. Allocated memory was 142.6MB in the beginning and 411.0MB in the end (delta: 268.4MB). Free memory was 87.9MB in the beginning and 353.8MB in the end (delta: -265.9MB). Peak memory consumption was 212.9MB. Max. memory is 16.1GB. [2025-02-05 15:02:43,643 INFO L158 Benchmark]: Witness Printer took 124.10ms. Allocated memory is still 411.0MB. Free memory was 353.8MB in the beginning and 349.7MB in the end (delta: 4.1MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-05 15:02:43,647 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 201.3MB. Free memory is still 122.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 177.68ms. Allocated memory is still 142.6MB. Free memory was 114.8MB in the beginning and 103.6MB in the end (delta: 11.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.64ms. Allocated memory is still 142.6MB. Free memory was 103.1MB in the beginning and 102.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 22.33ms. Allocated memory is still 142.6MB. Free memory was 102.1MB in the beginning and 101.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 225.47ms. Allocated memory is still 142.6MB. Free memory was 101.1MB in the beginning and 88.9MB in the end (delta: 12.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 38490.75ms. Allocated memory was 142.6MB in the beginning and 411.0MB in the end (delta: 268.4MB). Free memory was 87.9MB in the beginning and 353.8MB in the end (delta: -265.9MB). Peak memory consumption was 212.9MB. Max. memory is 16.1GB. * Witness Printer took 124.10ms. Allocated memory is still 411.0MB. Free memory was 353.8MB in the beginning and 349.7MB in the end (delta: 4.1MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10.5s, OverallIterations: 11, TraceHistogramMax: 22, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 5.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 99 SdHoareTripleChecker+Valid, 5.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 57 mSDsluCounter, 1413 SdHoareTripleChecker+Invalid, 4.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1085 mSDsCounter, 191 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 868 IncrementalHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 191 mSolverCounterUnsat, 328 mSDtfsCounter, 868 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 753 GetRequests, 660 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=106occurred in iteration=10, InterpolantAutomatonStates: 76, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 50 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 928 NumberOfCodeBlocks, 898 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 854 ConstructedInterpolants, 0 QuantifiedInterpolants, 3115 SizeOfPredicates, 15 NumberOfNonLiveVariables, 1082 ConjunctsInSsa, 142 ConjunctsInUnsatCore, 17 InterpolantComputations, 6 PerfectInterpolantSequences, 3450/3584 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Location Invariant Derived location invariant: ((((((((a <= 1) && (7 == y)) && (z == 12)) && (x == 1)) && (n == 1)) && (0 <= a)) || ((((((a <= 1) && (y == 1)) && (n == 0)) && (0 <= a)) && (x == 0)) && (6 == z))) || ((((((a <= 1) && (((((__int128) y * z) + 6) + ((__int128) z * z)) == ((((__int128) z * 4) + ((__int128) x * 18)) + ((__int128) y * 24)))) && (z == (6 + ((__int128) 6 * n)))) && (((((__int128) 2 * y) + (6 * a)) + 10) == (((__int128) a * z) + ((__int128) 2 * z)))) && (2 <= n)) && ((((((__int128) 3 * n) + (3 * ((__int128) n * n))) + (((__int128) n * n) * n)) + 1) == ((__int128) x + y)))) RESULT: Ultimate proved your program to be correct! [2025-02-05 15:02:43,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE