./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/simple_4-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-acceleration/simple_4-1.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9950a3ef699b75b517ce9b65b2c32dbbe13ac0a027bb7e02ceeaeee924f6aade --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 20:15:22,390 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 20:15:22,446 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 20:15:22,455 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 20:15:22,455 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 20:15:22,478 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 20:15:22,479 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 20:15:22,479 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 20:15:22,480 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 20:15:22,480 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 20:15:22,480 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 20:15:22,481 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 20:15:22,481 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 20:15:22,481 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 20:15:22,481 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 20:15:22,481 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 20:15:22,482 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 20:15:22,482 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 20:15:22,482 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 20:15:22,482 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 20:15:22,482 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 20:15:22,482 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 20:15:22,482 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 20:15:22,482 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 20:15:22,482 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 20:15:22,482 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 20:15:22,482 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 20:15:22,483 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 20:15:22,483 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 20:15:22,483 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 20:15:22,483 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 20:15:22,483 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 20:15:22,483 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 20:15:22,483 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 20:15:22,483 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 20:15:22,483 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 20:15:22,483 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 20:15:22,483 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 20:15:22,484 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 20:15:22,484 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 20:15:22,484 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 20:15:22,484 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 20:15:22,484 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 20:15:22,484 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 -> 9950a3ef699b75b517ce9b65b2c32dbbe13ac0a027bb7e02ceeaeee924f6aade [2025-02-07 20:15:22,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 20:15:22,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 20:15:22,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 20:15:22,693 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 20:15:22,693 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 20:15:22,695 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/simple_4-1.c [2025-02-07 20:15:23,754 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/60e2d33e2/79112b766ac84ba1bfb7df4c055a26de/FLAG65597fbaa [2025-02-07 20:15:23,985 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 20:15:23,986 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/loop-acceleration/simple_4-1.c [2025-02-07 20:15:23,995 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/60e2d33e2/79112b766ac84ba1bfb7df4c055a26de/FLAG65597fbaa [2025-02-07 20:15:24,345 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/60e2d33e2/79112b766ac84ba1bfb7df4c055a26de [2025-02-07 20:15:24,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 20:15:24,351 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 20:15:24,352 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 20:15:24,352 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 20:15:24,355 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 20:15:24,359 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 08:15:24" (1/1) ... [2025-02-07 20:15:24,359 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d3ed3b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:15:24, skipping insertion in model container [2025-02-07 20:15:24,359 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 08:15:24" (1/1) ... [2025-02-07 20:15:24,371 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 20:15:24,472 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/loop-acceleration/simple_4-1.c[322,335] [2025-02-07 20:15:24,478 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 20:15:24,483 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 20:15:24,489 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/loop-acceleration/simple_4-1.c[322,335] [2025-02-07 20:15:24,490 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 20:15:24,498 INFO L204 MainTranslator]: Completed translation [2025-02-07 20:15:24,499 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:15:24 WrapperNode [2025-02-07 20:15:24,499 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 20:15:24,500 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 20:15:24,500 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 20:15:24,500 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 20:15:24,504 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:15:24" (1/1) ... [2025-02-07 20:15:24,506 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:15:24" (1/1) ... [2025-02-07 20:15:24,516 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 19 [2025-02-07 20:15:24,516 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 20:15:24,517 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 20:15:24,517 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 20:15:24,517 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 20:15:24,523 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:15:24" (1/1) ... [2025-02-07 20:15:24,523 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:15:24" (1/1) ... [2025-02-07 20:15:24,523 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:15:24" (1/1) ... [2025-02-07 20:15:24,530 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-07 20:15:24,530 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:15:24" (1/1) ... [2025-02-07 20:15:24,530 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:15:24" (1/1) ... [2025-02-07 20:15:24,531 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:15:24" (1/1) ... [2025-02-07 20:15:24,532 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:15:24" (1/1) ... [2025-02-07 20:15:24,532 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:15:24" (1/1) ... [2025-02-07 20:15:24,532 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:15:24" (1/1) ... [2025-02-07 20:15:24,533 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 20:15:24,533 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 20:15:24,533 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 20:15:24,533 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 20:15:24,534 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:15:24" (1/1) ... [2025-02-07 20:15:24,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 20:15:24,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:15:24,558 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-07 20:15:24,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-07 20:15:24,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 20:15:24,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 20:15:24,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 20:15:24,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 20:15:24,609 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 20:15:24,610 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 20:15:24,665 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-02-07 20:15:24,665 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 20:15:24,670 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 20:15:24,670 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 20:15:24,670 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:15:24 BoogieIcfgContainer [2025-02-07 20:15:24,670 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 20:15:24,672 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 20:15:24,672 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 20:15:24,674 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 20:15:24,675 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 08:15:24" (1/3) ... [2025-02-07 20:15:24,675 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca26110 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 08:15:24, skipping insertion in model container [2025-02-07 20:15:24,675 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:15:24" (2/3) ... [2025-02-07 20:15:24,675 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca26110 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 08:15:24, skipping insertion in model container [2025-02-07 20:15:24,675 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:15:24" (3/3) ... [2025-02-07 20:15:24,676 INFO L128 eAbstractionObserver]: Analyzing ICFG simple_4-1.c [2025-02-07 20:15:24,684 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 20:15:24,685 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG simple_4-1.c that has 1 procedures, 8 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-02-07 20:15:24,712 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 20:15:24,719 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;@384bec3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 20:15:24,719 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 20:15:24,721 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 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) [2025-02-07 20:15:24,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2025-02-07 20:15:24,723 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:15:24,724 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2025-02-07 20:15:24,724 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:15:24,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:15:24,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1136958, now seen corresponding path program 1 times [2025-02-07 20:15:24,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:15:24,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628654588] [2025-02-07 20:15:24,732 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:15:24,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:15:24,769 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-07 20:15:24,782 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-07 20:15:24,782 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:15:24,782 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:15:24,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:15:24,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:15:24,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628654588] [2025-02-07 20:15:24,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628654588] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:15:24,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:15:24,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-07 20:15:24,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700538060] [2025-02-07 20:15:24,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:15:24,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-07 20:15:24,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:15:24,876 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-07 20:15:24,876 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 20:15:24,877 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 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) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2025-02-07 20:15:24,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:15:24,889 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2025-02-07 20:15:24,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-07 20:15:24,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) Word has length 4 [2025-02-07 20:15:24,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:15:24,894 INFO L225 Difference]: With dead ends: 15 [2025-02-07 20:15:24,894 INFO L226 Difference]: Without dead ends: 6 [2025-02-07 20:15:24,896 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 20:15:24,897 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:15:24,898 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:15:24,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2025-02-07 20:15:24,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2025-02-07 20:15:24,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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) [2025-02-07 20:15:24,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2025-02-07 20:15:24,914 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2025-02-07 20:15:24,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:15:24,914 INFO L471 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2025-02-07 20:15:24,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2025-02-07 20:15:24,914 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2025-02-07 20:15:24,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2025-02-07 20:15:24,914 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:15:24,914 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2025-02-07 20:15:24,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 20:15:24,915 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:15:24,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:15:24,915 INFO L85 PathProgramCache]: Analyzing trace with hash 35277444, now seen corresponding path program 1 times [2025-02-07 20:15:24,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:15:24,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320861907] [2025-02-07 20:15:24,915 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:15:24,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:15:24,919 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-07 20:15:24,934 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-07 20:15:24,934 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:15:24,934 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:15:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:15:24,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:15:24,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320861907] [2025-02-07 20:15:24,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320861907] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:15:24,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042284832] [2025-02-07 20:15:24,995 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:15:24,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:15:24,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:15:24,998 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:15:24,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-07 20:15:25,031 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-07 20:15:25,041 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-07 20:15:25,041 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:15:25,041 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:15:25,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-07 20:15:25,046 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:15:25,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:15:25,069 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:15:25,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:15:25,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042284832] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:15:25,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:15:25,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2025-02-07 20:15:25,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928033713] [2025-02-07 20:15:25,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:15:25,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-07 20:15:25,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:15:25,092 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-07 20:15:25,092 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2025-02-07 20:15:25,092 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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) [2025-02-07 20:15:25,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:15:25,129 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2025-02-07 20:15:25,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 20:15:25,129 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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) Word has length 5 [2025-02-07 20:15:25,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:15:25,130 INFO L225 Difference]: With dead ends: 12 [2025-02-07 20:15:25,130 INFO L226 Difference]: Without dead ends: 9 [2025-02-07 20:15:25,130 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2025-02-07 20:15:25,131 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:15:25,131 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:15:25,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2025-02-07 20:15:25,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2025-02-07 20:15:25,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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) [2025-02-07 20:15:25,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2025-02-07 20:15:25,133 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2025-02-07 20:15:25,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:15:25,134 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2025-02-07 20:15:25,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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) [2025-02-07 20:15:25,134 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2025-02-07 20:15:25,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-02-07 20:15:25,134 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:15:25,134 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2025-02-07 20:15:25,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-07 20:15:25,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:15:25,339 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:15:25,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:15:25,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1285129538, now seen corresponding path program 2 times [2025-02-07 20:15:25,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:15:25,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405629220] [2025-02-07 20:15:25,340 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:15:25,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:15:25,345 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 8 statements into 2 equivalence classes. [2025-02-07 20:15:25,352 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 8 of 8 statements. [2025-02-07 20:15:25,352 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:15:25,352 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:15:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:15:25,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:15:25,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405629220] [2025-02-07 20:15:25,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405629220] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:15:25,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824515854] [2025-02-07 20:15:25,509 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:15:25,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:15:25,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:15:25,510 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:15:25,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-07 20:15:25,536 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 8 statements into 2 equivalence classes. [2025-02-07 20:15:25,546 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 8 of 8 statements. [2025-02-07 20:15:25,547 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:15:25,547 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:15:25,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-07 20:15:25,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:15:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:15:25,571 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:15:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:15:25,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824515854] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:15:25,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:15:25,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-02-07 20:15:25,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376070309] [2025-02-07 20:15:25,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:15:25,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-07 20:15:25,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:15:25,670 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-07 20:15:25,671 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2025-02-07 20:15:25,671 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 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) [2025-02-07 20:15:25,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:15:25,820 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2025-02-07 20:15:25,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 20:15:25,820 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 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) Word has length 8 [2025-02-07 20:15:25,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:15:25,820 INFO L225 Difference]: With dead ends: 18 [2025-02-07 20:15:25,820 INFO L226 Difference]: Without dead ends: 15 [2025-02-07 20:15:25,821 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2025-02-07 20:15:25,821 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:15:25,821 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:15:25,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2025-02-07 20:15:25,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2025-02-07 20:15:25,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 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) [2025-02-07 20:15:25,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2025-02-07 20:15:25,825 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2025-02-07 20:15:25,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:15:25,825 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2025-02-07 20:15:25,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 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) [2025-02-07 20:15:25,826 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2025-02-07 20:15:25,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-02-07 20:15:25,826 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:15:25,826 INFO L218 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2025-02-07 20:15:25,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-07 20:15:26,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:15:26,030 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:15:26,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:15:26,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1273477890, now seen corresponding path program 3 times [2025-02-07 20:15:26,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:15:26,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695870037] [2025-02-07 20:15:26,031 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:15:26,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:15:26,036 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 14 statements into 6 equivalence classes. [2025-02-07 20:15:26,053 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 14 of 14 statements. [2025-02-07 20:15:26,053 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-07 20:15:26,053 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:15:26,240 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:15:26,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:15:26,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695870037] [2025-02-07 20:15:26,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695870037] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:15:26,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099284950] [2025-02-07 20:15:26,240 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:15:26,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:15:26,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:15:26,243 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:15:26,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-07 20:15:26,265 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 14 statements into 6 equivalence classes. [2025-02-07 20:15:26,275 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 14 of 14 statements. [2025-02-07 20:15:26,275 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-07 20:15:26,275 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:15:26,276 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-07 20:15:26,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:15:26,310 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:15:26,311 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:15:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:15:26,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099284950] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:15:26,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:15:26,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2025-02-07 20:15:26,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400904523] [2025-02-07 20:15:26,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:15:26,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-07 20:15:26,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:15:26,539 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-07 20:15:26,540 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2025-02-07 20:15:26,541 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 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) [2025-02-07 20:15:27,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:15:27,322 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2025-02-07 20:15:27,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-07 20:15:27,322 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 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) Word has length 14 [2025-02-07 20:15:27,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:15:27,323 INFO L225 Difference]: With dead ends: 30 [2025-02-07 20:15:27,323 INFO L226 Difference]: Without dead ends: 27 [2025-02-07 20:15:27,323 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=440, Invalid=750, Unknown=0, NotChecked=0, Total=1190 [2025-02-07 20:15:27,324 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:15:27,324 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:15:27,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-02-07 20:15:27,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2025-02-07 20:15:27,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 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) [2025-02-07 20:15:27,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2025-02-07 20:15:27,337 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2025-02-07 20:15:27,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:15:27,337 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2025-02-07 20:15:27,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 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) [2025-02-07 20:15:27,337 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2025-02-07 20:15:27,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-02-07 20:15:27,337 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:15:27,337 INFO L218 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2025-02-07 20:15:27,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-07 20:15:27,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:15:27,538 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:15:27,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:15:27,539 INFO L85 PathProgramCache]: Analyzing trace with hash 325962110, now seen corresponding path program 4 times [2025-02-07 20:15:27,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:15:27,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715376041] [2025-02-07 20:15:27,539 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 20:15:27,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:15:27,547 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-02-07 20:15:27,575 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-07 20:15:27,575 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 20:15:27,575 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:15:27,978 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:15:27,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:15:27,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715376041] [2025-02-07 20:15:27,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715376041] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:15:27,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303539836] [2025-02-07 20:15:27,981 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 20:15:27,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:15:27,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:15:27,982 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:15:27,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-07 20:15:28,004 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-02-07 20:15:28,017 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-07 20:15:28,017 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 20:15:28,017 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:15:28,018 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-02-07 20:15:28,019 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:15:28,090 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:15:28,091 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:15:28,850 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:15:28,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303539836] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:15:28,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:15:28,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2025-02-07 20:15:28,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891591768] [2025-02-07 20:15:28,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:15:28,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-02-07 20:15:28,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:15:28,852 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-02-07 20:15:28,853 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=1682, Unknown=0, NotChecked=0, Total=2352 [2025-02-07 20:15:28,853 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 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) [2025-02-07 20:15:36,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:15:36,117 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2025-02-07 20:15:36,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-02-07 20:15:36,118 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 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) Word has length 26 [2025-02-07 20:15:36,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:15:36,118 INFO L225 Difference]: With dead ends: 54 [2025-02-07 20:15:36,118 INFO L226 Difference]: Without dead ends: 51 [2025-02-07 20:15:36,120 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1748, Invalid=3222, Unknown=0, NotChecked=0, Total=4970 [2025-02-07 20:15:36,120 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 20:15:36,120 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 20:15:36,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2025-02-07 20:15:36,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2025-02-07 20:15:36,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 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) [2025-02-07 20:15:36,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2025-02-07 20:15:36,135 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2025-02-07 20:15:36,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:15:36,135 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2025-02-07 20:15:36,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 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) [2025-02-07 20:15:36,136 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2025-02-07 20:15:36,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-02-07 20:15:36,137 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:15:36,137 INFO L218 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2025-02-07 20:15:36,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-07 20:15:36,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:15:36,338 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:15:36,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:15:36,339 INFO L85 PathProgramCache]: Analyzing trace with hash -598699394, now seen corresponding path program 5 times [2025-02-07 20:15:36,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:15:36,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843278516] [2025-02-07 20:15:36,339 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 20:15:36,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:15:36,348 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 50 statements into 24 equivalence classes. [2025-02-07 20:15:36,400 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) and asserted 50 of 50 statements. [2025-02-07 20:15:36,403 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2025-02-07 20:15:36,403 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:15:37,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:15:37,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:15:37,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843278516] [2025-02-07 20:15:37,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843278516] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:15:37,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523128128] [2025-02-07 20:15:37,641 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 20:15:37,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:15:37,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:15:37,644 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:15:37,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-07 20:15:37,670 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 50 statements into 24 equivalence classes. [2025-02-07 20:15:38,521 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) and asserted 50 of 50 statements. [2025-02-07 20:15:38,521 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2025-02-07 20:15:38,521 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:15:38,525 WARN L254 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 95 conjuncts are in the unsatisfiable core [2025-02-07 20:15:38,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:15:38,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:15:38,624 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:15:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:15:41,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523128128] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:15:41,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:15:41,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2025-02-07 20:15:41,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106635861] [2025-02-07 20:15:41,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:15:41,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2025-02-07 20:15:41,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:15:41,162 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2025-02-07 20:15:41,165 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2494, Invalid=6818, Unknown=0, NotChecked=0, Total=9312 [2025-02-07 20:15:41,165 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 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) [2025-02-07 20:15:53,314 WARN L286 SmtUtils]: Spent 10.90s on a formula simplification. DAG size of input: 190 DAG size of output: 190 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-02-07 20:16:06,417 WARN L286 SmtUtils]: Spent 12.36s on a formula simplification. DAG size of input: 186 DAG size of output: 186 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-02-07 20:16:17,060 WARN L286 SmtUtils]: Spent 9.84s on a formula simplification. DAG size of input: 182 DAG size of output: 182 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-02-07 20:16:27,132 WARN L286 SmtUtils]: Spent 8.46s on a formula simplification. DAG size of input: 178 DAG size of output: 178 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-02-07 20:16:36,197 WARN L286 SmtUtils]: Spent 7.73s on a formula simplification. DAG size of input: 174 DAG size of output: 174 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-02-07 20:16:46,082 WARN L286 SmtUtils]: Spent 9.04s on a formula simplification. DAG size of input: 170 DAG size of output: 170 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-02-07 20:16:54,003 WARN L286 SmtUtils]: Spent 7.34s on a formula simplification. DAG size of input: 166 DAG size of output: 166 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-02-07 20:17:07,270 WARN L286 SmtUtils]: Spent 6.57s on a formula simplification. DAG size of input: 158 DAG size of output: 158 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)