./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/nr5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 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/nr5.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 7a05e17fa6f76d5004d5085f0b83441da7dbecb194f05c3b661e69c00b5f4df0 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 09:15:17,612 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 09:15:17,672 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 09:15:17,678 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 09:15:17,678 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 09:15:17,694 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 09:15:17,695 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 09:15:17,695 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 09:15:17,695 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 09:15:17,695 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 09:15:17,695 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 09:15:17,695 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 09:15:17,696 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 09:15:17,696 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 09:15:17,696 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 09:15:17,696 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 09:15:17,696 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 09:15:17,696 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 09:15:17,696 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 09:15:17,696 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 09:15:17,696 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 09:15:17,696 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 09:15:17,696 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 09:15:17,698 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 09:15:17,698 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 09:15:17,698 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 09:15:17,698 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 09:15:17,698 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 09:15:17,698 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 09:15:17,699 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 09:15:17,699 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 09:15:17,699 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 09:15:17,699 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 09:15:17,699 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 09:15:17,699 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 09:15:17,699 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 09:15:17,700 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 09:15:17,700 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 09:15:17,700 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 09:15:17,700 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 09:15:17,700 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 09:15:17,700 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 09:15:17,700 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 09:15:17,700 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 -> 7a05e17fa6f76d5004d5085f0b83441da7dbecb194f05c3b661e69c00b5f4df0 [2025-03-03 09:15:17,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 09:15:17,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 09:15:17,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 09:15:17,942 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 09:15:17,942 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 09:15:17,944 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/nr5.c [2025-03-03 09:15:19,139 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/028326331/b0540cf27067422593aca1b96b1ac8b9/FLAG48c42f6a0 [2025-03-03 09:15:19,333 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 09:15:19,334 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/nr5.c [2025-03-03 09:15:19,339 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/028326331/b0540cf27067422593aca1b96b1ac8b9/FLAG48c42f6a0 [2025-03-03 09:15:19,348 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/028326331/b0540cf27067422593aca1b96b1ac8b9 [2025-03-03 09:15:19,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 09:15:19,351 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 09:15:19,352 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 09:15:19,352 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 09:15:19,355 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 09:15:19,355 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 09:15:19" (1/1) ... [2025-03-03 09:15:19,356 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64298f63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:15:19, skipping insertion in model container [2025-03-03 09:15:19,356 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 09:15:19" (1/1) ... [2025-03-03 09:15:19,369 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 09:15:19,471 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/nr5.c[394,407] [2025-03-03 09:15:19,487 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 09:15:19,494 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 09:15:19,503 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/nr5.c[394,407] [2025-03-03 09:15:19,509 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 09:15:19,521 INFO L204 MainTranslator]: Completed translation [2025-03-03 09:15:19,522 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:15:19 WrapperNode [2025-03-03 09:15:19,522 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 09:15:19,524 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 09:15:19,524 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 09:15:19,524 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 09:15:19,528 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:15:19" (1/1) ... [2025-03-03 09:15:19,535 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:15:19" (1/1) ... [2025-03-03 09:15:19,548 INFO L138 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2025-03-03 09:15:19,549 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 09:15:19,550 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 09:15:19,551 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 09:15:19,551 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 09:15:19,556 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:15:19" (1/1) ... [2025-03-03 09:15:19,556 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:15:19" (1/1) ... [2025-03-03 09:15:19,557 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:15:19" (1/1) ... [2025-03-03 09:15:19,572 INFO L175 MemorySlicer]: Split 12 memory accesses to 3 slices as follows [2, 6, 4]. 50 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 6, 0]. The 2 writes are split as follows [0, 0, 2]. [2025-03-03 09:15:19,572 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:15:19" (1/1) ... [2025-03-03 09:15:19,572 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:15:19" (1/1) ... [2025-03-03 09:15:19,577 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:15:19" (1/1) ... [2025-03-03 09:15:19,581 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:15:19" (1/1) ... [2025-03-03 09:15:19,582 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:15:19" (1/1) ... [2025-03-03 09:15:19,582 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:15:19" (1/1) ... [2025-03-03 09:15:19,583 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 09:15:19,587 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 09:15:19,587 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 09:15:19,587 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 09:15:19,587 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:15:19" (1/1) ... [2025-03-03 09:15:19,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 09:15:19,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:15:19,613 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) [2025-03-03 09:15:19,617 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 [2025-03-03 09:15:19,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 09:15:19,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 09:15:19,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-03 09:15:19,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-03 09:15:19,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-03 09:15:19,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-03 09:15:19,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-03 09:15:19,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-03 09:15:19,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 09:15:19,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 09:15:19,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-03 09:15:19,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-03 09:15:19,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-03 09:15:19,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-03 09:15:19,694 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 09:15:19,695 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 09:15:19,828 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2025-03-03 09:15:19,828 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 09:15:19,836 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 09:15:19,837 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 09:15:19,837 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 09:15:19 BoogieIcfgContainer [2025-03-03 09:15:19,837 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 09:15:19,838 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 09:15:19,838 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 09:15:19,842 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 09:15:19,842 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 09:15:19" (1/3) ... [2025-03-03 09:15:19,842 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37bb7371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 09:15:19, skipping insertion in model container [2025-03-03 09:15:19,842 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:15:19" (2/3) ... [2025-03-03 09:15:19,842 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37bb7371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 09:15:19, skipping insertion in model container [2025-03-03 09:15:19,843 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 09:15:19" (3/3) ... [2025-03-03 09:15:19,843 INFO L128 eAbstractionObserver]: Analyzing ICFG nr5.c [2025-03-03 09:15:19,856 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 09:15:19,858 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG nr5.c that has 1 procedures, 21 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-03 09:15:19,895 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 09:15:19,904 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;@14f0b954, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 09:15:19,904 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 09:15:19,908 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 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) [2025-03-03 09:15:19,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-03 09:15:19,913 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:15:19,913 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:15:19,913 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:15:19,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:15:19,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1768238075, now seen corresponding path program 1 times [2025-03-03 09:15:19,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:15:19,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978417008] [2025-03-03 09:15:19,922 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:15:19,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:15:19,970 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-03 09:15:19,984 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-03 09:15:19,986 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:15:19,986 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:15:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:15:20,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:15:20,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978417008] [2025-03-03 09:15:20,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978417008] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:15:20,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 09:15:20,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-03 09:15:20,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490708474] [2025-03-03 09:15:20,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:15:20,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-03 09:15:20,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:15:20,046 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-03 09:15:20,046 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-03 09:15:20,047 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2025-03-03 09:15:20,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:15:20,055 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2025-03-03 09:15:20,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-03 09:15:20,056 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 [2025-03-03 09:15:20,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:15:20,060 INFO L225 Difference]: With dead ends: 37 [2025-03-03 09:15:20,060 INFO L226 Difference]: Without dead ends: 17 [2025-03-03 09:15:20,062 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-03 09:15:20,063 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:15:20,064 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:15:20,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2025-03-03 09:15:20,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2025-03-03 09:15:20,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 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) [2025-03-03 09:15:20,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2025-03-03 09:15:20,085 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 12 [2025-03-03 09:15:20,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:15:20,086 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2025-03-03 09:15:20,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2025-03-03 09:15:20,086 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2025-03-03 09:15:20,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-03 09:15:20,086 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:15:20,086 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:15:20,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 09:15:20,087 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:15:20,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:15:20,087 INFO L85 PathProgramCache]: Analyzing trace with hash -783918886, now seen corresponding path program 1 times [2025-03-03 09:15:20,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:15:20,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958869756] [2025-03-03 09:15:20,088 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:15:20,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:15:20,102 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-03 09:15:20,118 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-03 09:15:20,119 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:15:20,119 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:15:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:15:20,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:15:20,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958869756] [2025-03-03 09:15:20,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958869756] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:15:20,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 09:15:20,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 09:15:20,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529267782] [2025-03-03 09:15:20,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:15:20,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 09:15:20,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:15:20,369 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 09:15:20,369 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-03-03 09:15:20,369 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2025-03-03 09:15:20,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:15:20,417 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2025-03-03 09:15:20,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 09:15:20,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 [2025-03-03 09:15:20,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:15:20,418 INFO L225 Difference]: With dead ends: 28 [2025-03-03 09:15:20,418 INFO L226 Difference]: Without dead ends: 21 [2025-03-03 09:15:20,418 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-03-03 09:15:20,419 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:15:20,419 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 22 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:15:20,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-03-03 09:15:20,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2025-03-03 09:15:20,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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) [2025-03-03 09:15:20,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2025-03-03 09:15:20,425 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2025-03-03 09:15:20,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:15:20,425 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2025-03-03 09:15:20,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2025-03-03 09:15:20,425 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2025-03-03 09:15:20,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-03 09:15:20,425 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:15:20,425 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:15:20,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-03 09:15:20,426 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:15:20,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:15:20,426 INFO L85 PathProgramCache]: Analyzing trace with hash 2003912629, now seen corresponding path program 1 times [2025-03-03 09:15:20,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:15:20,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644189699] [2025-03-03 09:15:20,426 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:15:20,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:15:20,438 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-03 09:15:20,445 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-03 09:15:20,445 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:15:20,445 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:15:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:15:20,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:15:20,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644189699] [2025-03-03 09:15:20,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644189699] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:15:20,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 09:15:20,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-03 09:15:20,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167059352] [2025-03-03 09:15:20,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:15:20,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-03 09:15:20,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:15:20,500 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-03 09:15:20,500 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-03 09:15:20,500 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2025-03-03 09:15:20,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:15:20,519 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2025-03-03 09:15:20,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-03 09:15:20,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-03-03 09:15:20,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:15:20,520 INFO L225 Difference]: With dead ends: 32 [2025-03-03 09:15:20,520 INFO L226 Difference]: Without dead ends: 21 [2025-03-03 09:15:20,521 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-03 09:15:20,521 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:15:20,522 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 30 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:15:20,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-03-03 09:15:20,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2025-03-03 09:15:20,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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) [2025-03-03 09:15:20,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2025-03-03 09:15:20,527 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 14 [2025-03-03 09:15:20,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:15:20,527 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2025-03-03 09:15:20,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2025-03-03 09:15:20,528 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2025-03-03 09:15:20,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-03 09:15:20,528 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:15:20,528 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:15:20,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-03 09:15:20,528 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:15:20,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:15:20,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1205006704, now seen corresponding path program 1 times [2025-03-03 09:15:20,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:15:20,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594283567] [2025-03-03 09:15:20,529 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:15:20,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:15:20,535 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-03 09:15:20,540 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-03 09:15:20,541 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:15:20,541 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:15:20,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:15:20,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:15:20,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594283567] [2025-03-03 09:15:20,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594283567] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:15:20,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274547828] [2025-03-03 09:15:20,581 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:15:20,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:15:20,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:15:20,585 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) [2025-03-03 09:15:20,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 09:15:20,625 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-03 09:15:20,641 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-03 09:15:20,642 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:15:20,642 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:15:20,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-03 09:15:20,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:15:20,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:15:20,672 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:15:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:15:20,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274547828] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:15:20,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:15:20,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-03 09:15:20,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852625530] [2025-03-03 09:15:20,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:15:20,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-03 09:15:20,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:15:20,692 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-03 09:15:20,692 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-03 09:15:20,692 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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) [2025-03-03 09:15:20,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:15:20,731 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2025-03-03 09:15:20,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 09:15:20,731 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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 17 [2025-03-03 09:15:20,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:15:20,732 INFO L225 Difference]: With dead ends: 40 [2025-03-03 09:15:20,732 INFO L226 Difference]: Without dead ends: 28 [2025-03-03 09:15:20,732 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-03 09:15:20,733 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:15:20,733 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 43 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:15:20,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-03-03 09:15:20,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2025-03-03 09:15:20,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 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) [2025-03-03 09:15:20,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2025-03-03 09:15:20,737 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 17 [2025-03-03 09:15:20,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:15:20,737 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2025-03-03 09:15:20,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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) [2025-03-03 09:15:20,737 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2025-03-03 09:15:20,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-03 09:15:20,737 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:15:20,737 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:15:20,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-03 09:15:20,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:15:20,938 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:15:20,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:15:20,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1141378059, now seen corresponding path program 2 times [2025-03-03 09:15:20,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:15:20,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876533416] [2025-03-03 09:15:20,940 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:15:20,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:15:20,949 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-03 09:15:20,973 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-03 09:15:20,973 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:15:20,973 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:15:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:15:21,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:15:21,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876533416] [2025-03-03 09:15:21,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876533416] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:15:21,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035909646] [2025-03-03 09:15:21,050 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:15:21,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:15:21,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:15:21,053 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) [2025-03-03 09:15:21,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 09:15:21,093 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-03 09:15:21,112 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-03 09:15:21,113 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:15:21,113 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:15:21,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 09:15:21,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:15:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:15:21,139 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:15:21,180 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:15:21,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035909646] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:15:21,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:15:21,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2025-03-03 09:15:21,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118754394] [2025-03-03 09:15:21,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:15:21,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-03 09:15:21,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:15:21,181 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-03 09:15:21,181 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2025-03-03 09:15:21,182 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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) [2025-03-03 09:15:21,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:15:21,228 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2025-03-03 09:15:21,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-03 09:15:21,228 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2025-03-03 09:15:21,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:15:21,229 INFO L225 Difference]: With dead ends: 52 [2025-03-03 09:15:21,229 INFO L226 Difference]: Without dead ends: 31 [2025-03-03 09:15:21,229 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2025-03-03 09:15:21,229 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:15:21,230 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 43 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:15:21,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-03-03 09:15:21,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2025-03-03 09:15:21,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 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) [2025-03-03 09:15:21,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2025-03-03 09:15:21,238 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 26 [2025-03-03 09:15:21,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:15:21,239 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2025-03-03 09:15:21,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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) [2025-03-03 09:15:21,239 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2025-03-03 09:15:21,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-03 09:15:21,239 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:15:21,239 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:15:21,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-03 09:15:21,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:15:21,444 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:15:21,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:15:21,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1143349968, now seen corresponding path program 3 times [2025-03-03 09:15:21,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:15:21,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973825207] [2025-03-03 09:15:21,445 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:15:21,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:15:21,454 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 7 equivalence classes. [2025-03-03 09:15:21,469 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 17 of 29 statements. [2025-03-03 09:15:21,469 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 09:15:21,469 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:15:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-03-03 09:15:21,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:15:21,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973825207] [2025-03-03 09:15:21,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973825207] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:15:21,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 09:15:21,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 09:15:21,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11564047] [2025-03-03 09:15:21,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:15:21,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 09:15:21,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:15:21,525 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 09:15:21,525 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-03-03 09:15:21,526 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2025-03-03 09:15:21,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:15:21,555 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2025-03-03 09:15:21,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 09:15:21,557 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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) Word has length 29 [2025-03-03 09:15:21,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:15:21,558 INFO L225 Difference]: With dead ends: 63 [2025-03-03 09:15:21,558 INFO L226 Difference]: Without dead ends: 39 [2025-03-03 09:15:21,559 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-03-03 09:15:21,559 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:15:21,559 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 40 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:15:21,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2025-03-03 09:15:21,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2025-03-03 09:15:21,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 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) [2025-03-03 09:15:21,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2025-03-03 09:15:21,568 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 29 [2025-03-03 09:15:21,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:15:21,568 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2025-03-03 09:15:21,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2025-03-03 09:15:21,568 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2025-03-03 09:15:21,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-03 09:15:21,569 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:15:21,569 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:15:21,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-03 09:15:21,569 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:15:21,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:15:21,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1344162865, now seen corresponding path program 1 times [2025-03-03 09:15:21,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:15:21,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243840402] [2025-03-03 09:15:21,571 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:15:21,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:15:21,580 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-03 09:15:21,598 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 09:15:21,600 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:15:21,600 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:15:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:15:22,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:15:22,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243840402] [2025-03-03 09:15:22,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243840402] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:15:22,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590599887] [2025-03-03 09:15:22,391 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:15:22,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:15:22,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:15:22,394 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) [2025-03-03 09:15:22,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 09:15:22,433 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-03 09:15:22,455 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 09:15:22,455 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:15:22,455 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:15:22,460 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-03 09:15:22,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:15:22,568 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 [2025-03-03 09:15:22,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-03 09:15:22,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:15:22,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:15:22,793 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-03 09:15:22,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2025-03-03 09:15:22,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:15:22,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:15:22,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:15:22,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:15:22,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:15:22,963 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-03 09:15:22,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 46 [2025-03-03 09:15:23,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:15:23,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:15:23,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:15:23,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:15:23,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:15:23,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:15:23,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:15:23,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:15:23,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:15:23,192 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-03 09:15:23,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 49 [2025-03-03 09:15:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:15:23,396 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:16:17,322 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 62 treesize of output 60 [2025-03-03 09:16:17,333 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 85746 treesize of output 85490 [2025-03-03 09:16:17,686 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:16:17,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590599887] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:16:17,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:16:17,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 43 [2025-03-03 09:16:17,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661525211] [2025-03-03 09:16:17,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:16:17,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-03-03 09:16:17,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:16:17,691 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-03-03 09:16:17,693 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=1478, Unknown=9, NotChecked=0, Total=1806 [2025-03-03 09:16:17,693 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 43 states, 43 states have (on average 1.813953488372093) internal successors, (78), 43 states have internal predecessors, (78), 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) [2025-03-03 09:16:19,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:16:19,347 INFO L93 Difference]: Finished difference Result 184 states and 238 transitions. [2025-03-03 09:16:19,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-03-03 09:16:19,347 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.813953488372093) internal successors, (78), 43 states have internal predecessors, (78), 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 29 [2025-03-03 09:16:19,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:16:19,348 INFO L225 Difference]: With dead ends: 184 [2025-03-03 09:16:19,348 INFO L226 Difference]: Without dead ends: 160 [2025-03-03 09:16:19,350 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2188 ImplicationChecksByTransitivity, 55.6s TimeCoverageRelationStatistics Valid=1194, Invalid=5937, Unknown=9, NotChecked=0, Total=7140 [2025-03-03 09:16:19,351 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 342 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-03 09:16:19,351 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 177 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-03 09:16:19,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2025-03-03 09:16:19,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 90. [2025-03-03 09:16:19,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.2808988764044944) internal successors, (114), 89 states have internal predecessors, (114), 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) [2025-03-03 09:16:19,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 114 transitions. [2025-03-03 09:16:19,361 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 114 transitions. Word has length 29 [2025-03-03 09:16:19,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:16:19,361 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 114 transitions. [2025-03-03 09:16:19,361 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.813953488372093) internal successors, (78), 43 states have internal predecessors, (78), 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) [2025-03-03 09:16:19,361 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 114 transitions. [2025-03-03 09:16:19,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-03 09:16:19,362 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:16:19,362 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:16:19,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-03 09:16:19,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:16:19,566 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:16:19,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:16:19,567 INFO L85 PathProgramCache]: Analyzing trace with hash 765938142, now seen corresponding path program 1 times [2025-03-03 09:16:19,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:16:19,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116622252] [2025-03-03 09:16:19,567 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:16:19,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:16:19,572 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-03 09:16:19,577 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-03 09:16:19,578 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:16:19,578 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:16:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 09:16:19,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:16:19,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116622252] [2025-03-03 09:16:19,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116622252] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:16:19,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990218940] [2025-03-03 09:16:19,648 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:16:19,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:16:19,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:16:19,650 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) [2025-03-03 09:16:19,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 09:16:19,689 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-03 09:16:19,703 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-03 09:16:19,703 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:16:19,703 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:16:19,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 09:16:19,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:16:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 09:16:19,797 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:16:19,845 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 09:16:19,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990218940] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:16:19,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:16:19,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2025-03-03 09:16:19,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018727424] [2025-03-03 09:16:19,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:16:19,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-03 09:16:19,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:16:19,846 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-03 09:16:19,846 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2025-03-03 09:16:19,846 INFO L87 Difference]: Start difference. First operand 90 states and 114 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 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) [2025-03-03 09:16:19,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:16:19,880 INFO L93 Difference]: Finished difference Result 134 states and 168 transitions. [2025-03-03 09:16:19,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-03 09:16:19,880 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 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 34 [2025-03-03 09:16:19,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:16:19,881 INFO L225 Difference]: With dead ends: 134 [2025-03-03 09:16:19,881 INFO L226 Difference]: Without dead ends: 62 [2025-03-03 09:16:19,881 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2025-03-03 09:16:19,882 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 15 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:16:19,882 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 66 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:16:19,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-03-03 09:16:19,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2025-03-03 09:16:19,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.125) internal successors, (63), 56 states have internal predecessors, (63), 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) [2025-03-03 09:16:19,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2025-03-03 09:16:19,886 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 34 [2025-03-03 09:16:19,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:16:19,886 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2025-03-03 09:16:19,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 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) [2025-03-03 09:16:19,887 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2025-03-03 09:16:19,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-03-03 09:16:19,887 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:16:19,887 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:16:19,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-03 09:16:20,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:16:20,088 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:16:20,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:16:20,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1891944527, now seen corresponding path program 2 times [2025-03-03 09:16:20,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:16:20,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780144417] [2025-03-03 09:16:20,088 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:16:20,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:16:20,093 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 39 statements into 2 equivalence classes. [2025-03-03 09:16:20,107 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-03 09:16:20,107 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:16:20,107 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:16:20,657 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 09:16:20,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:16:20,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780144417] [2025-03-03 09:16:20,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780144417] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:16:20,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724761810] [2025-03-03 09:16:20,658 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:16:20,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:16:20,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:16:20,660 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) [2025-03-03 09:16:20,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 09:16:20,698 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 39 statements into 2 equivalence classes. [2025-03-03 09:16:20,717 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-03 09:16:20,717 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:16:20,717 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:16:20,718 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-03 09:16:20,721 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:16:20,851 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 [2025-03-03 09:16:20,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:16:20,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2025-03-03 09:16:21,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:16:21,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:16:21,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:16:21,033 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-03 09:16:21,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2025-03-03 09:16:21,351 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:16:21,351 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:16:29,849 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 41 treesize of output 39 [2025-03-03 09:16:29,853 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 358 treesize of output 350 [2025-03-03 09:16:30,015 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:16:30,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724761810] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:16:30,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:16:30,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 16] total 45 [2025-03-03 09:16:30,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416126148] [2025-03-03 09:16:30,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:16:30,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-03-03 09:16:30,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:16:30,017 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-03-03 09:16:30,018 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1722, Unknown=2, NotChecked=0, Total=1980 [2025-03-03 09:16:30,018 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 45 states, 45 states have (on average 2.3777777777777778) internal successors, (107), 45 states have internal predecessors, (107), 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) [2025-03-03 09:16:45,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-03 09:16:48,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-03 09:16:52,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-03 09:16:56,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]