./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/mlceu.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-tiling/mlceu.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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 0d3cc2e7af8cdfad5003daafcde8bd8bcf193cd0b5d066a7a9bad715ddc9d422 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 00:24:00,390 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 00:24:00,436 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 00:24:00,440 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 00:24:00,441 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 00:24:00,461 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 00:24:00,462 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 00:24:00,462 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 00:24:00,462 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 00:24:00,463 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 00:24:00,463 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 00:24:00,463 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 00:24:00,464 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 00:24:00,464 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 00:24:00,464 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 00:24:00,464 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 00:24:00,464 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 00:24:00,464 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 00:24:00,465 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 00:24:00,465 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 00:24:00,465 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 00:24:00,465 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 00:24:00,465 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 00:24:00,465 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 00:24:00,465 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 00:24:00,465 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 00:24:00,465 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 00:24:00,465 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 00:24:00,465 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 00:24:00,465 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 00:24:00,466 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 00:24:00,466 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 00:24:00,466 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 00:24:00,466 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 00:24:00,466 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 00:24:00,466 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 00:24:00,466 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 00:24:00,466 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 00:24:00,466 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 00:24:00,466 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 00:24:00,467 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 00:24:00,467 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 00:24:00,467 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 00:24:00,467 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/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 -> 0d3cc2e7af8cdfad5003daafcde8bd8bcf193cd0b5d066a7a9bad715ddc9d422 [2025-03-08 00:24:00,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 00:24:00,683 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 00:24:00,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 00:24:00,686 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 00:24:00,686 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 00:24:00,688 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/mlceu.c [2025-03-08 00:24:01,788 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a1088ec2/39407eaa64dc4686a24c7d30fb3879a8/FLAGd3a225bb4 [2025-03-08 00:24:01,981 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 00:24:01,982 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mlceu.c [2025-03-08 00:24:02,000 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a1088ec2/39407eaa64dc4686a24c7d30fb3879a8/FLAGd3a225bb4 [2025-03-08 00:24:02,348 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a1088ec2/39407eaa64dc4686a24c7d30fb3879a8 [2025-03-08 00:24:02,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 00:24:02,351 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 00:24:02,352 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 00:24:02,352 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 00:24:02,354 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 00:24:02,355 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 12:24:02" (1/1) ... [2025-03-08 00:24:02,356 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33211a5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:24:02, skipping insertion in model container [2025-03-08 00:24:02,356 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 12:24:02" (1/1) ... [2025-03-08 00:24:02,364 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 00:24:02,453 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mlceu.c[396,409] [2025-03-08 00:24:02,467 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 00:24:02,475 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 00:24:02,485 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mlceu.c[396,409] [2025-03-08 00:24:02,492 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 00:24:02,504 INFO L204 MainTranslator]: Completed translation [2025-03-08 00:24:02,505 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:24:02 WrapperNode [2025-03-08 00:24:02,505 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 00:24:02,506 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 00:24:02,506 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 00:24:02,506 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 00:24:02,511 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:24:02" (1/1) ... [2025-03-08 00:24:02,515 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:24:02" (1/1) ... [2025-03-08 00:24:02,526 INFO L138 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 56 [2025-03-08 00:24:02,527 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 00:24:02,528 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 00:24:02,528 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 00:24:02,528 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 00:24:02,533 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:24:02" (1/1) ... [2025-03-08 00:24:02,534 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:24:02" (1/1) ... [2025-03-08 00:24:02,539 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:24:02" (1/1) ... [2025-03-08 00:24:02,551 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 8, 3]. 62 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 2 writes are split as follows [0, 0, 2]. [2025-03-08 00:24:02,552 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:24:02" (1/1) ... [2025-03-08 00:24:02,553 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:24:02" (1/1) ... [2025-03-08 00:24:02,556 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:24:02" (1/1) ... [2025-03-08 00:24:02,559 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:24:02" (1/1) ... [2025-03-08 00:24:02,559 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:24:02" (1/1) ... [2025-03-08 00:24:02,562 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:24:02" (1/1) ... [2025-03-08 00:24:02,563 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 00:24:02,564 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 00:24:02,564 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 00:24:02,564 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 00:24:02,565 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:24:02" (1/1) ... [2025-03-08 00:24:02,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 00:24:02,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:24:02,592 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 00:24:02,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 00:24:02,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 00:24:02,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 00:24:02,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 00:24:02,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-08 00:24:02,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 00:24:02,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 00:24:02,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-08 00:24:02,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-08 00:24:02,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 00:24:02,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 00:24:02,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 00:24:02,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 00:24:02,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-08 00:24:02,668 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 00:24:02,669 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 00:24:02,773 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2025-03-08 00:24:02,773 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 00:24:02,781 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 00:24:02,782 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 00:24:02,783 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 12:24:02 BoogieIcfgContainer [2025-03-08 00:24:02,783 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 00:24:02,785 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 00:24:02,785 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 00:24:02,788 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 00:24:02,788 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 12:24:02" (1/3) ... [2025-03-08 00:24:02,789 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50df616d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 12:24:02, skipping insertion in model container [2025-03-08 00:24:02,789 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:24:02" (2/3) ... [2025-03-08 00:24:02,789 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50df616d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 12:24:02, skipping insertion in model container [2025-03-08 00:24:02,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 12:24:02" (3/3) ... [2025-03-08 00:24:02,791 INFO L128 eAbstractionObserver]: Analyzing ICFG mlceu.c [2025-03-08 00:24:02,802 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 00:24:02,803 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG mlceu.c that has 1 procedures, 16 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-08 00:24:02,845 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 00:24:02,855 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;@6c6bee1a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 00:24:02,855 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 00:24:02,858 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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) [2025-03-08 00:24:02,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-08 00:24:02,862 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:24:02,862 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:24:02,862 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:24:02,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:24:02,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1497158959, now seen corresponding path program 1 times [2025-03-08 00:24:02,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:24:02,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55301615] [2025-03-08 00:24:02,875 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:24:02,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:24:02,937 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-08 00:24:02,963 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-08 00:24:02,964 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:24:02,964 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:24:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:24:03,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:24:03,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55301615] [2025-03-08 00:24:03,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55301615] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:24:03,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 00:24:03,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 00:24:03,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961004327] [2025-03-08 00:24:03,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:24:03,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 00:24:03,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:24:03,156 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 00:24:03,156 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 00:24:03,158 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2025-03-08 00:24:03,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:24:03,218 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2025-03-08 00:24:03,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 00:24:03,221 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) Word has length 9 [2025-03-08 00:24:03,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:24:03,225 INFO L225 Difference]: With dead ends: 39 [2025-03-08 00:24:03,226 INFO L226 Difference]: Without dead ends: 21 [2025-03-08 00:24:03,229 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 00:24:03,232 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:24:03,234 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 21 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:24:03,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-03-08 00:24:03,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2025-03-08 00:24:03,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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) [2025-03-08 00:24:03,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2025-03-08 00:24:03,258 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2025-03-08 00:24:03,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:24:03,258 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2025-03-08 00:24:03,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2025-03-08 00:24:03,259 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2025-03-08 00:24:03,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-08 00:24:03,260 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:24:03,260 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:24:03,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 00:24:03,261 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:24:03,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:24:03,261 INFO L85 PathProgramCache]: Analyzing trace with hash 746206550, now seen corresponding path program 1 times [2025-03-08 00:24:03,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:24:03,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374946815] [2025-03-08 00:24:03,262 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:24:03,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:24:03,274 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-08 00:24:03,303 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-08 00:24:03,304 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:24:03,305 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:24:03,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:24:03,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:24:03,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374946815] [2025-03-08 00:24:03,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374946815] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:24:03,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248827655] [2025-03-08 00:24:03,592 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:24:03,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:24:03,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:24:03,594 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:24:03,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 00:24:03,628 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-08 00:24:03,640 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-08 00:24:03,641 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:24:03,641 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:24:03,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-08 00:24:03,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:24:03,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 00:24:03,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:24:03,731 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:24:03,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2025-03-08 00:24:03,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2025-03-08 00:24:03,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:24:03,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248827655] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:24:03,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:24:03,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2025-03-08 00:24:03,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138338540] [2025-03-08 00:24:03,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:24:03,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 00:24:03,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:24:03,788 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 00:24:03,788 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-03-08 00:24:03,788 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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) [2025-03-08 00:24:03,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:24:03,868 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2025-03-08 00:24:03,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 00:24:03,869 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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 12 [2025-03-08 00:24:03,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:24:03,869 INFO L225 Difference]: With dead ends: 22 [2025-03-08 00:24:03,869 INFO L226 Difference]: Without dead ends: 20 [2025-03-08 00:24:03,870 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2025-03-08 00:24:03,870 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:24:03,871 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 46 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:24:03,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-08 00:24:03,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2025-03-08 00:24:03,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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) [2025-03-08 00:24:03,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2025-03-08 00:24:03,876 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2025-03-08 00:24:03,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:24:03,877 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2025-03-08 00:24:03,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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) [2025-03-08 00:24:03,877 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2025-03-08 00:24:03,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-08 00:24:03,877 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:24:03,877 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:24:03,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 00:24:04,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:24:04,078 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:24:04,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:24:04,078 INFO L85 PathProgramCache]: Analyzing trace with hash -510521228, now seen corresponding path program 1 times [2025-03-08 00:24:04,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:24:04,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763280797] [2025-03-08 00:24:04,079 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:24:04,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:24:04,084 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 00:24:04,088 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 00:24:04,090 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:24:04,091 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:24:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:24:04,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:24:04,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763280797] [2025-03-08 00:24:04,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763280797] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:24:04,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595729033] [2025-03-08 00:24:04,157 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:24:04,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:24:04,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:24:04,159 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:24:04,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 00:24:04,194 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 00:24:04,210 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 00:24:04,211 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:24:04,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:24:04,212 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 00:24:04,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:24:04,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:24:04,264 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:24:04,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:24:04,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595729033] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:24:04,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:24:04,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2025-03-08 00:24:04,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722328163] [2025-03-08 00:24:04,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:24:04,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 00:24:04,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:24:04,305 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 00:24:04,305 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-03-08 00:24:04,305 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 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) [2025-03-08 00:24:04,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:24:04,355 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2025-03-08 00:24:04,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 00:24:04,356 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 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 15 [2025-03-08 00:24:04,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:24:04,356 INFO L225 Difference]: With dead ends: 41 [2025-03-08 00:24:04,356 INFO L226 Difference]: Without dead ends: 27 [2025-03-08 00:24:04,356 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-03-08 00:24:04,357 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:24:04,357 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 26 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:24:04,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-03-08 00:24:04,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2025-03-08 00:24:04,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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) [2025-03-08 00:24:04,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2025-03-08 00:24:04,361 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2025-03-08 00:24:04,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:24:04,361 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2025-03-08 00:24:04,361 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 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) [2025-03-08 00:24:04,362 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2025-03-08 00:24:04,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-08 00:24:04,362 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:24:04,362 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:24:04,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 00:24:04,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-03-08 00:24:04,566 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:24:04,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:24:04,566 INFO L85 PathProgramCache]: Analyzing trace with hash 2079744825, now seen corresponding path program 2 times [2025-03-08 00:24:04,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:24:04,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731342232] [2025-03-08 00:24:04,567 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:24:04,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:24:04,573 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-08 00:24:04,585 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 00:24:04,587 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:24:04,587 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:24:04,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:24:04,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:24:04,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731342232] [2025-03-08 00:24:04,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731342232] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:24:04,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222653033] [2025-03-08 00:24:04,859 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:24:04,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:24:04,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:24:04,862 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:24:04,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 00:24:04,896 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-08 00:24:04,910 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 00:24:04,911 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:24:04,911 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:24:04,912 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-08 00:24:04,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:24:04,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 00:24:05,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:24:05,005 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:24:05,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-08 00:24:05,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-08 00:24:05,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:24:05,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222653033] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:24:05,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:24:05,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2025-03-08 00:24:05,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796566921] [2025-03-08 00:24:05,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:24:05,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 00:24:05,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:24:05,092 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 00:24:05,092 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2025-03-08 00:24:05,092 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 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) [2025-03-08 00:24:05,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:24:05,231 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2025-03-08 00:24:05,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 00:24:05,231 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 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 18 [2025-03-08 00:24:05,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:24:05,232 INFO L225 Difference]: With dead ends: 47 [2025-03-08 00:24:05,232 INFO L226 Difference]: Without dead ends: 37 [2025-03-08 00:24:05,232 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2025-03-08 00:24:05,232 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 45 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:24:05,232 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 61 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:24:05,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-03-08 00:24:05,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2025-03-08 00:24:05,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 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) [2025-03-08 00:24:05,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2025-03-08 00:24:05,236 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2025-03-08 00:24:05,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:24:05,236 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2025-03-08 00:24:05,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 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) [2025-03-08 00:24:05,237 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2025-03-08 00:24:05,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-03-08 00:24:05,237 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:24:05,237 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:24:05,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-08 00:24:05,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:24:05,441 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:24:05,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:24:05,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1519258703, now seen corresponding path program 3 times [2025-03-08 00:24:05,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:24:05,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399015392] [2025-03-08 00:24:05,442 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:24:05,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:24:05,452 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 3 equivalence classes. [2025-03-08 00:24:05,464 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 00:24:05,465 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-08 00:24:05,465 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:24:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:24:05,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:24:05,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399015392] [2025-03-08 00:24:05,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399015392] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:24:05,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875582992] [2025-03-08 00:24:05,536 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:24:05,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:24:05,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:24:05,538 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:24:05,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 00:24:05,582 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 3 equivalence classes. [2025-03-08 00:24:05,598 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 00:24:05,598 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-08 00:24:05,598 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:24:05,600 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 00:24:05,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:24:05,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:24:05,666 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:24:05,708 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:24:05,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875582992] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:24:05,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:24:05,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2025-03-08 00:24:05,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412189415] [2025-03-08 00:24:05,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:24:05,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 00:24:05,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:24:05,713 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 00:24:05,713 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2025-03-08 00:24:05,713 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 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) [2025-03-08 00:24:05,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:24:05,773 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2025-03-08 00:24:05,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 00:24:05,774 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 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 21 [2025-03-08 00:24:05,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:24:05,774 INFO L225 Difference]: With dead ends: 45 [2025-03-08 00:24:05,774 INFO L226 Difference]: Without dead ends: 33 [2025-03-08 00:24:05,774 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2025-03-08 00:24:05,775 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:24:05,775 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 41 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:24:05,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-03-08 00:24:05,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2025-03-08 00:24:05,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 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) [2025-03-08 00:24:05,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2025-03-08 00:24:05,779 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2025-03-08 00:24:05,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:24:05,779 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2025-03-08 00:24:05,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 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) [2025-03-08 00:24:05,779 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2025-03-08 00:24:05,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-08 00:24:05,779 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:24:05,779 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:24:05,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-08 00:24:05,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:24:05,980 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:24:05,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:24:05,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1492934326, now seen corresponding path program 4 times [2025-03-08 00:24:05,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:24:05,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028426275] [2025-03-08 00:24:05,981 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:24:05,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:24:05,987 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 24 statements into 2 equivalence classes. [2025-03-08 00:24:05,996 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 00:24:05,996 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:24:05,997 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:24:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:24:06,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:24:06,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028426275] [2025-03-08 00:24:06,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028426275] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:24:06,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146414972] [2025-03-08 00:24:06,209 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:24:06,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:24:06,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:24:06,211 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:24:06,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 00:24:06,242 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 24 statements into 2 equivalence classes. [2025-03-08 00:24:06,255 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 00:24:06,255 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:24:06,255 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:24:06,256 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-08 00:24:06,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:24:06,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-08 00:24:06,325 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:24:06,325 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:24:06,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-08 00:24:06,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-08 00:24:06,355 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:24:06,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146414972] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:24:06,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:24:06,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 14 [2025-03-08 00:24:06,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969547545] [2025-03-08 00:24:06,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:24:06,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 00:24:06,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:24:06,356 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 00:24:06,357 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2025-03-08 00:24:06,357 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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) [2025-03-08 00:24:06,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:24:06,477 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2025-03-08 00:24:06,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 00:24:06,478 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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 24 [2025-03-08 00:24:06,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:24:06,478 INFO L225 Difference]: With dead ends: 34 [2025-03-08 00:24:06,478 INFO L226 Difference]: Without dead ends: 32 [2025-03-08 00:24:06,479 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2025-03-08 00:24:06,479 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:24:06,479 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 68 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:24:06,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-03-08 00:24:06,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2025-03-08 00:24:06,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 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) [2025-03-08 00:24:06,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2025-03-08 00:24:06,484 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2025-03-08 00:24:06,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:24:06,485 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2025-03-08 00:24:06,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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) [2025-03-08 00:24:06,485 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2025-03-08 00:24:06,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-08 00:24:06,486 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:24:06,486 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:24:06,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 00:24:06,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:24:06,687 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:24:06,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:24:06,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1621027604, now seen corresponding path program 5 times [2025-03-08 00:24:06,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:24:06,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698716159] [2025-03-08 00:24:06,688 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:24:06,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:24:06,696 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 4 equivalence classes. [2025-03-08 00:24:06,711 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 00:24:06,712 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-08 00:24:06,712 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:24:06,807 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:24:06,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:24:06,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698716159] [2025-03-08 00:24:06,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698716159] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:24:06,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433152206] [2025-03-08 00:24:06,808 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:24:06,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:24:06,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:24:06,810 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:24:06,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 00:24:06,843 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 4 equivalence classes. [2025-03-08 00:24:06,858 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 00:24:06,858 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-08 00:24:06,858 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:24:06,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 00:24:06,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:24:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:24:06,944 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:24:06,993 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:24:06,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433152206] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:24:06,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:24:06,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2025-03-08 00:24:06,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518421824] [2025-03-08 00:24:06,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:24:06,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 00:24:06,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:24:06,994 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 00:24:06,995 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2025-03-08 00:24:06,995 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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) [2025-03-08 00:24:07,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:24:07,070 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2025-03-08 00:24:07,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 00:24:07,070 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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 27 [2025-03-08 00:24:07,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:24:07,071 INFO L225 Difference]: With dead ends: 65 [2025-03-08 00:24:07,071 INFO L226 Difference]: Without dead ends: 39 [2025-03-08 00:24:07,071 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2025-03-08 00:24:07,072 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:24:07,072 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:24:07,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2025-03-08 00:24:07,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2025-03-08 00:24:07,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 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) [2025-03-08 00:24:07,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2025-03-08 00:24:07,075 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 27 [2025-03-08 00:24:07,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:24:07,076 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2025-03-08 00:24:07,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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) [2025-03-08 00:24:07,076 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2025-03-08 00:24:07,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-08 00:24:07,076 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:24:07,076 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:24:07,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-08 00:24:07,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:24:07,281 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:24:07,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:24:07,281 INFO L85 PathProgramCache]: Analyzing trace with hash 132922969, now seen corresponding path program 6 times [2025-03-08 00:24:07,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:24:07,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137665532] [2025-03-08 00:24:07,282 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:24:07,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:24:07,288 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 30 statements into 5 equivalence classes. [2025-03-08 00:24:07,314 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 00:24:07,314 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-08 00:24:07,314 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:24:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:24:07,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:24:07,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137665532] [2025-03-08 00:24:07,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137665532] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:24:07,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069419491] [2025-03-08 00:24:07,653 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:24:07,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:24:07,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:24:07,655 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:24:07,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 00:24:07,695 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 30 statements into 5 equivalence classes. [2025-03-08 00:24:07,722 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 00:24:07,722 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-08 00:24:07,722 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:24:07,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-08 00:24:07,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:24:07,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2025-03-08 00:24:08,060 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-08 00:24:08,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2025-03-08 00:24:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:24:08,077 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:24:08,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2025-03-08 00:24:08,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2025-03-08 00:24:08,444 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:24:08,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069419491] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:24:08,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:24:08,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2025-03-08 00:24:08,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908342047] [2025-03-08 00:24:08,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:24:08,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-08 00:24:08,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:24:08,445 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-08 00:24:08,445 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2025-03-08 00:24:08,445 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 30 states have internal predecessors, (68), 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) [2025-03-08 00:24:13,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-08 00:24:16,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-08 00:24:18,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-08 00:24:22,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2025-03-08 00:24:26,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-08 00:24:30,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-08 00:24:35,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2025-03-08 00:24:39,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-08 00:24:43,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-08 00:24:47,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-08 00:24:51,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-08 00:24:56,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-08 00:24:57,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-08 00:24:58,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-08 00:25:02,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-08 00:25:06,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-08 00:25:10,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-08 00:25:11,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:25:11,779 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2025-03-08 00:25:11,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-03-08 00:25:11,780 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 30 states have internal predecessors, (68), 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 30 [2025-03-08 00:25:11,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:25:11,780 INFO L225 Difference]: With dead ends: 94 [2025-03-08 00:25:11,780 INFO L226 Difference]: Without dead ends: 47 [2025-03-08 00:25:11,781 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=493, Invalid=2477, Unknown=0, NotChecked=0, Total=2970 [2025-03-08 00:25:11,782 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 109 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 63 mSolverCounterUnsat, 29 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 29 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.7s IncrementalHoareTripleChecker+Time [2025-03-08 00:25:11,782 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 94 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 365 Invalid, 29 Unknown, 0 Unchecked, 62.7s Time] [2025-03-08 00:25:11,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2025-03-08 00:25:11,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2025-03-08 00:25:11,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 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) [2025-03-08 00:25:11,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2025-03-08 00:25:11,785 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 30 [2025-03-08 00:25:11,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:25:11,786 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2025-03-08 00:25:11,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 30 states have internal predecessors, (68), 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) [2025-03-08 00:25:11,786 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2025-03-08 00:25:11,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-08 00:25:11,786 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:25:11,786 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:25:11,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-08 00:25:11,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:25:11,991 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:25:11,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:25:11,991 INFO L85 PathProgramCache]: Analyzing trace with hash -296809928, now seen corresponding path program 1 times [2025-03-08 00:25:11,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:25:11,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401799720] [2025-03-08 00:25:11,992 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:25:11,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:25:11,998 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-08 00:25:12,006 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-08 00:25:12,006 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:25:12,006 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:25:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 00:25:12,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:25:12,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401799720] [2025-03-08 00:25:12,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401799720] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:25:12,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479187992] [2025-03-08 00:25:12,073 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:25:12,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:25:12,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:25:12,075 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:25:12,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 00:25:12,113 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-08 00:25:12,125 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-08 00:25:12,126 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:25:12,126 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:25:12,127 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-08 00:25:12,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:25:12,151 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 00:25:12,151 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:25:12,226 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 00:25:12,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479187992] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:25:12,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:25:12,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2025-03-08 00:25:12,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938775973] [2025-03-08 00:25:12,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:25:12,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-08 00:25:12,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:25:12,229 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-08 00:25:12,230 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2025-03-08 00:25:12,230 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 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) [2025-03-08 00:25:12,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:25:12,324 INFO L93 Difference]: Finished difference Result 122 states and 134 transitions. [2025-03-08 00:25:12,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 00:25:12,324 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 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) Word has length 36 [2025-03-08 00:25:12,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:25:12,324 INFO L225 Difference]: With dead ends: 122 [2025-03-08 00:25:12,324 INFO L226 Difference]: Without dead ends: 106 [2025-03-08 00:25:12,325 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2025-03-08 00:25:12,325 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 96 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:25:12,325 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 61 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:25:12,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2025-03-08 00:25:12,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 59. [2025-03-08 00:25:12,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 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) [2025-03-08 00:25:12,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2025-03-08 00:25:12,336 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 36 [2025-03-08 00:25:12,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:25:12,336 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2025-03-08 00:25:12,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 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) [2025-03-08 00:25:12,336 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2025-03-08 00:25:12,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-03-08 00:25:12,338 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:25:12,338 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:25:12,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-08 00:25:12,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-03-08 00:25:12,539 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:25:12,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:25:12,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1833494067, now seen corresponding path program 2 times [2025-03-08 00:25:12,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:25:12,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42262240] [2025-03-08 00:25:12,539 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:25:12,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:25:12,555 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 57 statements into 2 equivalence classes. [2025-03-08 00:25:12,571 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 57 of 57 statements. [2025-03-08 00:25:12,571 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:25:12,571 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:25:12,760 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 25 proven. 222 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 00:25:12,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:25:12,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42262240] [2025-03-08 00:25:12,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42262240] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:25:12,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304581927] [2025-03-08 00:25:12,761 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:25:12,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:25:12,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:25:12,763 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:25:12,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 00:25:12,803 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 57 statements into 2 equivalence classes. [2025-03-08 00:25:12,823 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 57 of 57 statements. [2025-03-08 00:25:12,823 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:25:12,823 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:25:12,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 00:25:12,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:25:12,882 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 25 proven. 222 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 00:25:12,882 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:25:13,125 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 25 proven. 222 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 00:25:13,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304581927] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:25:13,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:25:13,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2025-03-08 00:25:13,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554703677] [2025-03-08 00:25:13,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:25:13,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-08 00:25:13,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:25:13,126 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-08 00:25:13,127 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2025-03-08 00:25:13,127 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 29 states, 29 states have (on average 3.206896551724138) internal successors, (93), 29 states have internal predecessors, (93), 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) [2025-03-08 00:25:13,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:25:13,313 INFO L93 Difference]: Finished difference Result 234 states and 253 transitions. [2025-03-08 00:25:13,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-08 00:25:13,313 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.206896551724138) internal successors, (93), 29 states have internal predecessors, (93), 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 57 [2025-03-08 00:25:13,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:25:13,314 INFO L225 Difference]: With dead ends: 234 [2025-03-08 00:25:13,314 INFO L226 Difference]: Without dead ends: 218 [2025-03-08 00:25:13,315 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2025-03-08 00:25:13,318 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 296 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:25:13,318 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 101 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:25:13,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2025-03-08 00:25:13,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 101. [2025-03-08 00:25:13,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.04) internal successors, (104), 100 states have internal predecessors, (104), 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) [2025-03-08 00:25:13,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2025-03-08 00:25:13,326 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 57 [2025-03-08 00:25:13,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:25:13,326 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2025-03-08 00:25:13,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.206896551724138) internal successors, (93), 29 states have internal predecessors, (93), 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) [2025-03-08 00:25:13,327 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2025-03-08 00:25:13,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2025-03-08 00:25:13,327 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:25:13,327 INFO L218 NwaCegarLoop]: trace histogram [27, 27, 26, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:25:13,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-08 00:25:13,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-08 00:25:13,528 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:25:13,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:25:13,528 INFO L85 PathProgramCache]: Analyzing trace with hash -128739501, now seen corresponding path program 3 times [2025-03-08 00:25:13,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:25:13,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064710185] [2025-03-08 00:25:13,529 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:25:13,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:25:13,545 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 99 statements into 28 equivalence classes. [2025-03-08 00:25:13,610 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) and asserted 99 of 99 statements. [2025-03-08 00:25:13,610 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2025-03-08 00:25:13,610 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:25:14,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 53 proven. 1027 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 00:25:14,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:25:14,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064710185] [2025-03-08 00:25:14,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064710185] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:25:14,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139407388] [2025-03-08 00:25:14,142 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:25:14,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:25:14,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:25:14,143 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:25:14,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 00:25:14,190 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 99 statements into 28 equivalence classes. [2025-03-08 00:25:17,997 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) and asserted 99 of 99 statements. [2025-03-08 00:25:17,997 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2025-03-08 00:25:17,997 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:25:18,009 INFO L256 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-08 00:25:18,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:25:18,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 53 proven. 1027 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 00:25:18,120 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:25:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 53 proven. 1027 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 00:25:18,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139407388] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:25:18,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:25:18,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2025-03-08 00:25:18,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183874875] [2025-03-08 00:25:18,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:25:18,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-03-08 00:25:18,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:25:18,855 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-03-08 00:25:18,856 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2025-03-08 00:25:18,857 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand has 57 states, 57 states have (on average 3.1052631578947367) internal successors, (177), 57 states have internal predecessors, (177), 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) [2025-03-08 00:25:19,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:25:19,352 INFO L93 Difference]: Finished difference Result 458 states and 491 transitions. [2025-03-08 00:25:19,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2025-03-08 00:25:19,353 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.1052631578947367) internal successors, (177), 57 states have internal predecessors, (177), 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 99 [2025-03-08 00:25:19,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:25:19,354 INFO L225 Difference]: With dead ends: 458 [2025-03-08 00:25:19,354 INFO L226 Difference]: Without dead ends: 442 [2025-03-08 00:25:19,355 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2025-03-08 00:25:19,355 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 804 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 00:25:19,356 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [804 Valid, 186 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 00:25:19,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2025-03-08 00:25:19,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 185. [2025-03-08 00:25:19,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.0217391304347827) internal successors, (188), 184 states have internal predecessors, (188), 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) [2025-03-08 00:25:19,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 188 transitions. [2025-03-08 00:25:19,374 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 188 transitions. Word has length 99 [2025-03-08 00:25:19,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:25:19,374 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 188 transitions. [2025-03-08 00:25:19,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.1052631578947367) internal successors, (177), 57 states have internal predecessors, (177), 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) [2025-03-08 00:25:19,374 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 188 transitions. [2025-03-08 00:25:19,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2025-03-08 00:25:19,375 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:25:19,375 INFO L218 NwaCegarLoop]: trace histogram [55, 55, 54, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:25:19,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-08 00:25:19,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-03-08 00:25:19,576 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:25:19,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:25:19,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1007894125, now seen corresponding path program 4 times [2025-03-08 00:25:19,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:25:19,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534770372] [2025-03-08 00:25:19,576 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:25:19,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:25:19,591 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 183 statements into 2 equivalence classes. [2025-03-08 00:25:19,623 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 183 of 183 statements. [2025-03-08 00:25:19,623 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:25:19,623 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:25:21,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4525 backedges. 109 proven. 4401 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 00:25:21,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:25:21,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534770372] [2025-03-08 00:25:21,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534770372] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:25:21,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708702726] [2025-03-08 00:25:21,472 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:25:21,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:25:21,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:25:21,474 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:25:21,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 00:25:21,547 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 183 statements into 2 equivalence classes. [2025-03-08 00:25:21,595 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 183 of 183 statements. [2025-03-08 00:25:21,595 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:25:21,595 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:25:21,598 INFO L256 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 56 conjuncts are in the unsatisfiable core [2025-03-08 00:25:21,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:25:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4525 backedges. 109 proven. 4401 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 00:25:21,766 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:25:24,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4525 backedges. 109 proven. 4401 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 00:25:24,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708702726] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:25:24,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:25:24,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 112 [2025-03-08 00:25:24,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089522726] [2025-03-08 00:25:24,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:25:24,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2025-03-08 00:25:24,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:25:24,336 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2025-03-08 00:25:24,338 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2025-03-08 00:25:24,338 INFO L87 Difference]: Start difference. First operand 185 states and 188 transitions. Second operand has 112 states, 112 states have (on average 3.044642857142857) internal successors, (341), 112 states have internal predecessors, (341), 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) [2025-03-08 00:25:27,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:25:27,105 INFO L93 Difference]: Finished difference Result 906 states and 967 transitions. [2025-03-08 00:25:27,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2025-03-08 00:25:27,105 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 3.044642857142857) internal successors, (341), 112 states have internal predecessors, (341), 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 183 [2025-03-08 00:25:27,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:25:27,108 INFO L225 Difference]: With dead ends: 906 [2025-03-08 00:25:27,108 INFO L226 Difference]: Without dead ends: 890 [2025-03-08 00:25:27,110 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2025-03-08 00:25:27,111 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 1724 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1724 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-08 00:25:27,111 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1724 Valid, 354 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-08 00:25:27,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2025-03-08 00:25:27,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 353. [2025-03-08 00:25:27,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.0113636363636365) internal successors, (356), 352 states have internal predecessors, (356), 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) [2025-03-08 00:25:27,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 356 transitions. [2025-03-08 00:25:27,135 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 356 transitions. Word has length 183 [2025-03-08 00:25:27,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:25:27,136 INFO L471 AbstractCegarLoop]: Abstraction has 353 states and 356 transitions. [2025-03-08 00:25:27,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 3.044642857142857) internal successors, (341), 112 states have internal predecessors, (341), 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) [2025-03-08 00:25:27,136 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 356 transitions. [2025-03-08 00:25:27,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2025-03-08 00:25:27,139 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:25:27,139 INFO L218 NwaCegarLoop]: trace histogram [111, 111, 110, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:25:27,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-08 00:25:27,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-08 00:25:27,340 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:25:27,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:25:27,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1696188909, now seen corresponding path program 5 times [2025-03-08 00:25:27,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:25:27,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704940514] [2025-03-08 00:25:27,340 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:25:27,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:25:27,369 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 351 statements into 112 equivalence classes. [2025-03-08 00:25:28,794 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 112 check-sat command(s) and asserted 351 of 351 statements. [2025-03-08 00:25:28,794 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 112 check-sat command(s) [2025-03-08 00:25:28,794 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:25:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 18441 backedges. 221 proven. 18205 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 00:25:34,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:25:34,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704940514] [2025-03-08 00:25:34,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704940514] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:25:34,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576660435] [2025-03-08 00:25:34,665 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:25:34,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:25:34,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:25:34,667 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:25:34,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 00:25:34,778 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 351 statements into 112 equivalence classes.