./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rew.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/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_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rew.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 a4dbd52ad78119a422ea606f98f820bbe5495fb5a7cf8886c665da2d1f9b569e --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-13 22:12:23,886 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 22:12:23,944 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 22:12:23,948 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 22:12:23,950 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 22:12:23,976 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 22:12:23,977 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 22:12:23,977 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 22:12:23,978 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 22:12:23,978 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 22:12:23,979 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 22:12:23,979 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 22:12:23,980 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 22:12:23,980 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 22:12:23,981 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 22:12:23,982 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 22:12:23,982 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 22:12:23,986 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 22:12:23,986 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 22:12:23,986 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 22:12:23,987 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 22:12:23,987 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 22:12:23,987 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 22:12:23,987 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 22:12:23,987 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 22:12:23,988 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 22:12:23,988 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 22:12:23,988 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 22:12:23,988 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 22:12:23,988 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 22:12:23,989 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 22:12:23,989 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 22:12:23,989 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 22:12:23,989 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 22:12:23,989 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 22:12:23,989 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 22:12:23,990 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 22:12:23,990 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 22:12:23,990 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 22:12:23,990 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 22:12:23,990 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 22:12:23,991 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 22:12:23,991 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4dbd52ad78119a422ea606f98f820bbe5495fb5a7cf8886c665da2d1f9b569e [2024-10-13 22:12:24,244 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 22:12:24,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 22:12:24,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 22:12:24,275 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 22:12:24,276 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 22:12:24,277 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rew.c [2024-10-13 22:12:25,656 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 22:12:25,800 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 22:12:25,801 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rew.c [2024-10-13 22:12:25,807 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ced8c357/56f98869951244e8b3ab17802b818a80/FLAG38f670887 [2024-10-13 22:12:25,824 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ced8c357/56f98869951244e8b3ab17802b818a80 [2024-10-13 22:12:25,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 22:12:25,827 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 22:12:25,827 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 22:12:25,828 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 22:12:25,832 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 22:12:25,832 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:12:25" (1/1) ... [2024-10-13 22:12:25,833 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44f0e829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:25, skipping insertion in model container [2024-10-13 22:12:25,833 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:12:25" (1/1) ... [2024-10-13 22:12:25,846 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 22:12:25,996 WARN L248 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/rew.c[394,407] [2024-10-13 22:12:26,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 22:12:26,018 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 22:12:26,027 WARN L248 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/rew.c[394,407] [2024-10-13 22:12:26,030 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 22:12:26,043 INFO L204 MainTranslator]: Completed translation [2024-10-13 22:12:26,043 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:26 WrapperNode [2024-10-13 22:12:26,043 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 22:12:26,044 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 22:12:26,044 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 22:12:26,044 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 22:12:26,052 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:26" (1/1) ... [2024-10-13 22:12:26,057 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:26" (1/1) ... [2024-10-13 22:12:26,072 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2024-10-13 22:12:26,072 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 22:12:26,073 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 22:12:26,073 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 22:12:26,073 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 22:12:26,084 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:26" (1/1) ... [2024-10-13 22:12:26,084 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:26" (1/1) ... [2024-10-13 22:12:26,085 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:26" (1/1) ... [2024-10-13 22:12:26,100 INFO L175 MemorySlicer]: Split 11 memory accesses to 3 slices as follows [2, 6, 3]. 55 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]. [2024-10-13 22:12:26,101 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:26" (1/1) ... [2024-10-13 22:12:26,101 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:26" (1/1) ... [2024-10-13 22:12:26,104 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:26" (1/1) ... [2024-10-13 22:12:26,106 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:26" (1/1) ... [2024-10-13 22:12:26,107 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:26" (1/1) ... [2024-10-13 22:12:26,107 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:26" (1/1) ... [2024-10-13 22:12:26,109 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 22:12:26,109 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 22:12:26,109 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 22:12:26,109 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 22:12:26,110 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:26" (1/1) ... [2024-10-13 22:12:26,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 22:12:26,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:12:26,136 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) [2024-10-13 22:12:26,142 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 [2024-10-13 22:12:26,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 22:12:26,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 22:12:26,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 22:12:26,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-13 22:12:26,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 22:12:26,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 22:12:26,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-13 22:12:26,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-13 22:12:26,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 22:12:26,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 22:12:26,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 22:12:26,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 22:12:26,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-13 22:12:26,235 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 22:12:26,237 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 22:12:26,315 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-10-13 22:12:26,315 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 22:12:26,336 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 22:12:26,336 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-13 22:12:26,337 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:12:26 BoogieIcfgContainer [2024-10-13 22:12:26,337 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 22:12:26,338 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 22:12:26,339 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 22:12:26,341 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 22:12:26,341 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:12:25" (1/3) ... [2024-10-13 22:12:26,342 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e1b7c97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:12:26, skipping insertion in model container [2024-10-13 22:12:26,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:26" (2/3) ... [2024-10-13 22:12:26,342 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e1b7c97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:12:26, skipping insertion in model container [2024-10-13 22:12:26,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:12:26" (3/3) ... [2024-10-13 22:12:26,343 INFO L112 eAbstractionObserver]: Analyzing ICFG rew.c [2024-10-13 22:12:26,355 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 22:12:26,355 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 22:12:26,392 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 22:12:26,397 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;@ebeb46, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 22:12:26,397 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-13 22:12:26,400 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 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) [2024-10-13 22:12:26,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-13 22:12:26,404 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:26,404 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:26,405 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:26,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:26,408 INFO L85 PathProgramCache]: Analyzing trace with hash 212078713, now seen corresponding path program 1 times [2024-10-13 22:12:26,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:26,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436178155] [2024-10-13 22:12:26,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:26,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:26,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:26,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:26,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:26,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436178155] [2024-10-13 22:12:26,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436178155] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:12:26,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:12:26,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 22:12:26,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058881752] [2024-10-13 22:12:26,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:12:26,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 22:12:26,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:26,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 22:12:26,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 22:12:26,576 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 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 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2024-10-13 22:12:26,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:26,598 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2024-10-13 22:12:26,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 22:12:26,601 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2024-10-13 22:12:26,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:26,605 INFO L225 Difference]: With dead ends: 23 [2024-10-13 22:12:26,606 INFO L226 Difference]: Without dead ends: 11 [2024-10-13 22:12:26,608 INFO L431 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 [2024-10-13 22:12:26,612 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:26,613 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:12:26,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-10-13 22:12:26,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2024-10-13 22:12:26,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 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) [2024-10-13 22:12:26,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2024-10-13 22:12:26,664 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2024-10-13 22:12:26,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:26,665 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2024-10-13 22:12:26,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2024-10-13 22:12:26,665 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2024-10-13 22:12:26,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-13 22:12:26,666 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:26,666 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:26,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 22:12:26,666 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:26,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:26,667 INFO L85 PathProgramCache]: Analyzing trace with hash 200072940, now seen corresponding path program 1 times [2024-10-13 22:12:26,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:26,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514127464] [2024-10-13 22:12:26,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:26,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:26,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:26,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:26,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514127464] [2024-10-13 22:12:26,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514127464] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:12:26,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:12:26,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 22:12:26,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037226400] [2024-10-13 22:12:26,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:12:26,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 22:12:26,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:26,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 22:12:26,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 22:12:26,808 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2024-10-13 22:12:26,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:26,837 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2024-10-13 22:12:26,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 22:12:26,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2024-10-13 22:12:26,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:26,838 INFO L225 Difference]: With dead ends: 23 [2024-10-13 22:12:26,838 INFO L226 Difference]: Without dead ends: 14 [2024-10-13 22:12:26,839 INFO L431 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 [2024-10-13 22:12:26,840 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:26,840 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 11 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:12:26,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-10-13 22:12:26,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2024-10-13 22:12:26,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:26,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2024-10-13 22:12:26,847 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2024-10-13 22:12:26,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:26,847 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2024-10-13 22:12:26,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2024-10-13 22:12:26,848 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2024-10-13 22:12:26,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-13 22:12:26,848 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:26,848 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:26,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 22:12:26,849 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:26,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:26,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1473365497, now seen corresponding path program 1 times [2024-10-13 22:12:26,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:26,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063947392] [2024-10-13 22:12:26,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:26,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:26,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:26,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:26,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:26,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063947392] [2024-10-13 22:12:26,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063947392] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:12:26,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668518196] [2024-10-13 22:12:26,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:26,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:26,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:12:26,949 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) [2024-10-13 22:12:26,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 22:12:27,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:27,023 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 22:12:27,028 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:12:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:27,087 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:12:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:27,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668518196] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:12:27,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:12:27,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-13 22:12:27,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060670104] [2024-10-13 22:12:27,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:12:27,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 22:12:27,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:27,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 22:12:27,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-10-13 22:12:27,111 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2024-10-13 22:12:27,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:27,162 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2024-10-13 22:12:27,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 22:12:27,163 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 10 [2024-10-13 22:12:27,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:27,164 INFO L225 Difference]: With dead ends: 26 [2024-10-13 22:12:27,164 INFO L226 Difference]: Without dead ends: 20 [2024-10-13 22:12:27,164 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2024-10-13 22:12:27,165 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:27,165 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 19 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:12:27,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-13 22:12:27,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2024-10-13 22:12:27,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:27,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2024-10-13 22:12:27,168 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2024-10-13 22:12:27,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:27,169 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2024-10-13 22:12:27,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2024-10-13 22:12:27,169 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2024-10-13 22:12:27,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-13 22:12:27,169 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:27,169 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:27,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-13 22:12:27,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:27,370 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:27,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:27,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1417430130, now seen corresponding path program 1 times [2024-10-13 22:12:27,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:27,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368315781] [2024-10-13 22:12:27,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:27,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:27,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:27,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:27,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368315781] [2024-10-13 22:12:27,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368315781] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:12:27,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919875786] [2024-10-13 22:12:27,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:27,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:27,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:12:27,748 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) [2024-10-13 22:12:27,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 22:12:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:27,801 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-13 22:12:27,803 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:12:27,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 22:12:28,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:12:28,019 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 27 treesize of output 11 [2024-10-13 22:12:28,073 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 15 treesize of output 7 [2024-10-13 22:12:28,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:28,095 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:12:28,172 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 23 treesize of output 21 [2024-10-13 22:12:28,177 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 52 treesize of output 50 [2024-10-13 22:12:28,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:28,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919875786] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:12:28,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:12:28,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-10-13 22:12:28,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879457585] [2024-10-13 22:12:28,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:12:28,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-13 22:12:28,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:28,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-13 22:12:28,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-10-13 22:12:28,224 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:28,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:28,303 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2024-10-13 22:12:28,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 22:12:28,304 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-10-13 22:12:28,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:28,304 INFO L225 Difference]: With dead ends: 21 [2024-10-13 22:12:28,304 INFO L226 Difference]: Without dead ends: 19 [2024-10-13 22:12:28,305 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2024-10-13 22:12:28,305 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:28,305 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 17 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:12:28,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-10-13 22:12:28,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2024-10-13 22:12:28,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:28,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2024-10-13 22:12:28,308 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2024-10-13 22:12:28,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:28,309 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2024-10-13 22:12:28,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:28,309 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2024-10-13 22:12:28,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-13 22:12:28,309 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:28,309 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:28,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 22:12:28,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-10-13 22:12:28,514 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:28,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:28,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1462728518, now seen corresponding path program 1 times [2024-10-13 22:12:28,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:28,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351507859] [2024-10-13 22:12:28,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:28,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:28,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:28,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:28,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351507859] [2024-10-13 22:12:28,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351507859] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:12:28,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837819584] [2024-10-13 22:12:28,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:28,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:28,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:12:28,733 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) [2024-10-13 22:12:28,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 22:12:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:28,776 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-13 22:12:28,778 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:12:28,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 22:12:28,927 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 15 treesize of output 7 [2024-10-13 22:12:28,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:28,948 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:12:29,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-10-13 22:12:29,023 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 24 treesize of output 20 [2024-10-13 22:12:29,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:29,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837819584] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:12:29,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:12:29,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-10-13 22:12:29,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072037823] [2024-10-13 22:12:29,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:12:29,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 22:12:29,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:29,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 22:12:29,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-10-13 22:12:29,070 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 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) [2024-10-13 22:12:29,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:29,169 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2024-10-13 22:12:29,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 22:12:29,171 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 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 16 [2024-10-13 22:12:29,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:29,172 INFO L225 Difference]: With dead ends: 40 [2024-10-13 22:12:29,172 INFO L226 Difference]: Without dead ends: 38 [2024-10-13 22:12:29,172 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-10-13 22:12:29,172 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 26 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:29,173 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 60 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:12:29,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-13 22:12:29,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2024-10-13 22:12:29,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 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) [2024-10-13 22:12:29,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-10-13 22:12:29,177 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2024-10-13 22:12:29,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:29,178 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-10-13 22:12:29,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 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) [2024-10-13 22:12:29,178 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-10-13 22:12:29,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-13 22:12:29,182 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:29,182 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:29,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 22:12:29,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:29,383 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:29,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:29,384 INFO L85 PathProgramCache]: Analyzing trace with hash -754750837, now seen corresponding path program 2 times [2024-10-13 22:12:29,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:29,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275364096] [2024-10-13 22:12:29,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:29,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:29,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:29,684 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:29,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:29,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275364096] [2024-10-13 22:12:29,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275364096] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:12:29,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956883759] [2024-10-13 22:12:29,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:12:29,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:29,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:12:29,687 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) [2024-10-13 22:12:29,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 22:12:29,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:12:29,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:12:29,738 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-13 22:12:29,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:12:29,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 22:12:29,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:12:29,840 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 27 treesize of output 11 [2024-10-13 22:12:29,914 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 15 treesize of output 7 [2024-10-13 22:12:29,935 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:29,935 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:12:30,036 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 25 treesize of output 23 [2024-10-13 22:12:30,044 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 54 treesize of output 50 [2024-10-13 22:12:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:30,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956883759] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:12:30,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:12:30,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2024-10-13 22:12:30,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226315976] [2024-10-13 22:12:30,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:12:30,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-13 22:12:30,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:30,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-13 22:12:30,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2024-10-13 22:12:30,103 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:30,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:30,244 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2024-10-13 22:12:30,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 22:12:30,244 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-13 22:12:30,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:30,245 INFO L225 Difference]: With dead ends: 35 [2024-10-13 22:12:30,245 INFO L226 Difference]: Without dead ends: 33 [2024-10-13 22:12:30,245 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2024-10-13 22:12:30,246 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:30,246 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 44 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:12:30,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-10-13 22:12:30,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 20. [2024-10-13 22:12:30,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:30,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2024-10-13 22:12:30,249 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 19 [2024-10-13 22:12:30,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:30,249 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2024-10-13 22:12:30,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:30,249 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2024-10-13 22:12:30,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-13 22:12:30,249 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:30,250 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:30,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-13 22:12:30,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:30,450 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:30,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:30,451 INFO L85 PathProgramCache]: Analyzing trace with hash -587628402, now seen corresponding path program 3 times [2024-10-13 22:12:30,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:30,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905232330] [2024-10-13 22:12:30,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:30,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:30,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:30,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:30,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:30,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905232330] [2024-10-13 22:12:30,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905232330] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:12:30,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915043463] [2024-10-13 22:12:30,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 22:12:30,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:30,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:12:30,540 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) [2024-10-13 22:12:30,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 22:12:30,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 22:12:30,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:12:30,599 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-13 22:12:30,600 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:12:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:30,686 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:12:30,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:30,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915043463] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:12:30,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:12:30,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2024-10-13 22:12:30,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651055614] [2024-10-13 22:12:30,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:12:30,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 22:12:30,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:30,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 22:12:30,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-10-13 22:12:30,726 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2024-10-13 22:12:30,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:30,797 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2024-10-13 22:12:30,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 22:12:30,799 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-13 22:12:30,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:30,800 INFO L225 Difference]: With dead ends: 51 [2024-10-13 22:12:30,800 INFO L226 Difference]: Without dead ends: 25 [2024-10-13 22:12:30,800 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2024-10-13 22:12:30,801 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:30,801 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 26 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:12:30,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-13 22:12:30,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2024-10-13 22:12:30,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 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) [2024-10-13 22:12:30,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2024-10-13 22:12:30,806 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2024-10-13 22:12:30,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:30,806 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2024-10-13 22:12:30,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2024-10-13 22:12:30,808 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2024-10-13 22:12:30,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-13 22:12:30,808 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:30,808 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:30,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-13 22:12:31,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:31,009 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:31,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:31,010 INFO L85 PathProgramCache]: Analyzing trace with hash -623113431, now seen corresponding path program 4 times [2024-10-13 22:12:31,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:31,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200125645] [2024-10-13 22:12:31,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:31,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:31,193 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:31,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:31,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200125645] [2024-10-13 22:12:31,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200125645] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:12:31,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818777121] [2024-10-13 22:12:31,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 22:12:31,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:31,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:12:31,196 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:12:31,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 22:12:31,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 22:12:31,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:12:31,254 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-13 22:12:31,255 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:12:31,343 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 23 treesize of output 1 [2024-10-13 22:12:31,631 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-13 22:12:31,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-10-13 22:12:31,651 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:31,651 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:12:31,803 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 20 treesize of output 18 [2024-10-13 22:12:31,805 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 26 treesize of output 20 [2024-10-13 22:12:31,939 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:31,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818777121] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:12:31,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:12:31,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2024-10-13 22:12:31,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445428187] [2024-10-13 22:12:31,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:12:31,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-13 22:12:31,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:31,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-13 22:12:31,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2024-10-13 22:12:31,941 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 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) [2024-10-13 22:12:32,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:32,295 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2024-10-13 22:12:32,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-13 22:12:32,296 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 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 22 [2024-10-13 22:12:32,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:32,296 INFO L225 Difference]: With dead ends: 46 [2024-10-13 22:12:32,296 INFO L226 Difference]: Without dead ends: 31 [2024-10-13 22:12:32,297 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2024-10-13 22:12:32,297 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:32,298 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 68 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 22:12:32,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-13 22:12:32,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2024-10-13 22:12:32,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:32,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2024-10-13 22:12:32,301 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2024-10-13 22:12:32,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:32,301 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2024-10-13 22:12:32,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 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) [2024-10-13 22:12:32,301 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2024-10-13 22:12:32,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-13 22:12:32,302 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:32,302 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:32,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-13 22:12:32,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:32,507 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:32,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:32,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1195657554, now seen corresponding path program 5 times [2024-10-13 22:12:32,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:32,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639860064] [2024-10-13 22:12:32,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:32,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:32,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:32,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:32,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639860064] [2024-10-13 22:12:32,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639860064] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:12:32,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209789053] [2024-10-13 22:12:32,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 22:12:32,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:32,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:12:32,781 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:12:32,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 22:12:32,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-13 22:12:32,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:12:32,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-13 22:12:32,848 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:12:32,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 22:12:32,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:12:32,980 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 27 treesize of output 11 [2024-10-13 22:12:33,126 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 15 treesize of output 7 [2024-10-13 22:12:33,145 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:33,145 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:12:37,352 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 25 treesize of output 23 [2024-10-13 22:12:37,356 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 54 treesize of output 50 [2024-10-13 22:12:37,471 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:37,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209789053] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:12:37,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:12:37,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2024-10-13 22:12:37,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669973184] [2024-10-13 22:12:37,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:12:37,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-13 22:12:37,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:37,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-13 22:12:37,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=668, Unknown=1, NotChecked=0, Total=756 [2024-10-13 22:12:37,475 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 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) [2024-10-13 22:12:37,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:37,789 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2024-10-13 22:12:37,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 22:12:37,790 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 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 25 [2024-10-13 22:12:37,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:37,794 INFO L225 Difference]: With dead ends: 33 [2024-10-13 22:12:37,794 INFO L226 Difference]: Without dead ends: 31 [2024-10-13 22:12:37,795 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=159, Invalid=1172, Unknown=1, NotChecked=0, Total=1332 [2024-10-13 22:12:37,795 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 32 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:37,795 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 80 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 22:12:37,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-13 22:12:37,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2024-10-13 22:12:37,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 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) [2024-10-13 22:12:37,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2024-10-13 22:12:37,799 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 25 [2024-10-13 22:12:37,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:37,799 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2024-10-13 22:12:37,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 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) [2024-10-13 22:12:37,799 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2024-10-13 22:12:37,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-13 22:12:37,799 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:37,799 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:37,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-13 22:12:38,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:38,000 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:38,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:38,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1665128410, now seen corresponding path program 6 times [2024-10-13 22:12:38,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:38,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150707300] [2024-10-13 22:12:38,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:38,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:38,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:38,299 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:38,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:38,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150707300] [2024-10-13 22:12:38,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150707300] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:12:38,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325765401] [2024-10-13 22:12:38,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 22:12:38,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:38,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:12:38,301 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:12:38,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 22:12:38,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-10-13 22:12:38,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:12:38,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-13 22:12:38,362 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:12:38,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 22:12:38,520 INFO L349 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2024-10-13 22:12:38,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2024-10-13 22:12:38,939 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:12:38,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2024-10-13 22:12:38,960 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:38,960 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:12:39,319 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 27 treesize of output 25 [2024-10-13 22:12:39,323 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 122 treesize of output 110 [2024-10-13 22:12:39,518 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:39,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325765401] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:12:39,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:12:39,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 37 [2024-10-13 22:12:39,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310259811] [2024-10-13 22:12:39,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:12:39,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-10-13 22:12:39,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:39,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-10-13 22:12:39,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1116, Unknown=0, NotChecked=0, Total=1332 [2024-10-13 22:12:39,520 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 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) [2024-10-13 22:12:40,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:40,844 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2024-10-13 22:12:40,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-13 22:12:40,845 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 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 28 [2024-10-13 22:12:40,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:40,846 INFO L225 Difference]: With dead ends: 70 [2024-10-13 22:12:40,846 INFO L226 Difference]: Without dead ends: 35 [2024-10-13 22:12:40,847 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=614, Invalid=3046, Unknown=0, NotChecked=0, Total=3660 [2024-10-13 22:12:40,848 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 57 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:40,848 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 87 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-13 22:12:40,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-13 22:12:40,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-10-13 22:12:40,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 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) [2024-10-13 22:12:40,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2024-10-13 22:12:40,853 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 28 [2024-10-13 22:12:40,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:40,854 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2024-10-13 22:12:40,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 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) [2024-10-13 22:12:40,854 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2024-10-13 22:12:40,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-13 22:12:40,854 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:40,855 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:40,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-13 22:12:41,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-13 22:12:41,056 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:41,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:41,056 INFO L85 PathProgramCache]: Analyzing trace with hash -498543098, now seen corresponding path program 7 times [2024-10-13 22:12:41,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:41,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686620613] [2024-10-13 22:12:41,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:41,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:41,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:41,470 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:41,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:41,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686620613] [2024-10-13 22:12:41,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686620613] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:12:41,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904680466] [2024-10-13 22:12:41,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 22:12:41,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:41,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:12:41,472 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:12:41,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-13 22:12:41,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:41,528 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-13 22:12:41,530 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:12:41,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 22:12:41,685 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 11 [2024-10-13 22:12:41,693 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 11 [2024-10-13 22:12:41,727 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 11 [2024-10-13 22:12:41,855 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 15 treesize of output 7 [2024-10-13 22:12:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:41,878 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:12:50,177 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 34 treesize of output 32 [2024-10-13 22:12:50,180 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 238 treesize of output 230 [2024-10-13 22:12:50,292 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:50,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904680466] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:12:50,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:12:50,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2024-10-13 22:12:50,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256006494] [2024-10-13 22:12:50,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:12:50,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-10-13 22:12:50,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:50,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-10-13 22:12:50,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2024-10-13 22:12:50,294 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 37 states have internal predecessors, (97), 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) [2024-10-13 22:12:50,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:50,651 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2024-10-13 22:12:50,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-13 22:12:50,651 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 37 states have internal predecessors, (97), 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 [2024-10-13 22:12:50,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:50,652 INFO L225 Difference]: With dead ends: 56 [2024-10-13 22:12:50,652 INFO L226 Difference]: Without dead ends: 54 [2024-10-13 22:12:50,653 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=188, Invalid=1452, Unknown=0, NotChecked=0, Total=1640 [2024-10-13 22:12:50,653 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:50,653 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 152 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 22:12:50,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-13 22:12:50,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2024-10-13 22:12:50,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 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) [2024-10-13 22:12:50,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2024-10-13 22:12:50,657 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 34 [2024-10-13 22:12:50,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:50,658 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2024-10-13 22:12:50,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 37 states have internal predecessors, (97), 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) [2024-10-13 22:12:50,658 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2024-10-13 22:12:50,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-13 22:12:50,659 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:50,659 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:50,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-13 22:12:50,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:50,863 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:50,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:50,863 INFO L85 PathProgramCache]: Analyzing trace with hash -95245874, now seen corresponding path program 8 times [2024-10-13 22:12:50,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:50,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442563113] [2024-10-13 22:12:50,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:50,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:50,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:51,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:51,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442563113] [2024-10-13 22:12:51,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442563113] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:12:51,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164634432] [2024-10-13 22:12:51,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:12:51,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:51,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:12:51,252 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:12:51,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-13 22:12:51,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:12:51,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:12:51,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-13 22:12:51,319 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:12:51,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 22:12:51,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:12:51,521 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 27 treesize of output 11 [2024-10-13 22:12:51,775 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 15 treesize of output 7 [2024-10-13 22:12:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:51,801 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:13:01,624 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 25 treesize of output 23 [2024-10-13 22:13:01,627 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 118 treesize of output 110 [2024-10-13 22:13:01,811 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:13:01,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164634432] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:13:01,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:13:01,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2024-10-13 22:13:01,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294591189] [2024-10-13 22:13:01,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:13:01,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-13 22:13:01,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:13:01,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-13 22:13:01,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1433, Unknown=2, NotChecked=0, Total=1560 [2024-10-13 22:13:01,814 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 40 states, 40 states have (on average 2.65) internal successors, (106), 40 states have internal predecessors, (106), 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) [2024-10-13 22:13:02,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:13:02,393 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2024-10-13 22:13:02,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-13 22:13:02,394 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.65) internal successors, (106), 40 states have internal predecessors, (106), 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 37 [2024-10-13 22:13:02,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:13:02,394 INFO L225 Difference]: With dead ends: 45 [2024-10-13 22:13:02,394 INFO L226 Difference]: Without dead ends: 43 [2024-10-13 22:13:02,395 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=229, Invalid=2525, Unknown=2, NotChecked=0, Total=2756 [2024-10-13 22:13:02,396 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 22:13:02,396 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 143 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 22:13:02,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-13 22:13:02,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2024-10-13 22:13:02,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 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) [2024-10-13 22:13:02,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2024-10-13 22:13:02,400 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 37 [2024-10-13 22:13:02,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:13:02,401 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2024-10-13 22:13:02,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.65) internal successors, (106), 40 states have internal predecessors, (106), 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) [2024-10-13 22:13:02,401 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2024-10-13 22:13:02,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-13 22:13:02,402 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:13:02,402 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:13:02,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-13 22:13:02,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-13 22:13:02,604 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:13:02,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:13:02,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1508827398, now seen corresponding path program 9 times [2024-10-13 22:13:02,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:13:02,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832680233] [2024-10-13 22:13:02,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:13:02,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:13:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:13:03,030 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:13:03,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:13:03,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832680233] [2024-10-13 22:13:03,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832680233] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:13:03,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605311688] [2024-10-13 22:13:03,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 22:13:03,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:13:03,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:13:03,033 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:13:03,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-13 22:13:03,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-10-13 22:13:03,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:13:03,139 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-13 22:13:03,144 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:13:03,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-13 22:13:03,799 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-13 22:13:03,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-10-13 22:13:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 35 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:13:03,827 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:13:04,235 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 20 treesize of output 18 [2024-10-13 22:13:04,238 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 26 treesize of output 20 [2024-10-13 22:13:04,577 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 26 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:13:04,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605311688] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:13:04,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:13:04,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 47 [2024-10-13 22:13:04,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332482497] [2024-10-13 22:13:04,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:13:04,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-10-13 22:13:04,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:13:04,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-10-13 22:13:04,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1886, Unknown=0, NotChecked=0, Total=2162 [2024-10-13 22:13:04,580 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 47 states, 47 states have (on average 2.4468085106382977) internal successors, (115), 47 states have internal predecessors, (115), 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) [2024-10-13 22:13:05,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:13:05,435 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2024-10-13 22:13:05,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-13 22:13:05,436 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.4468085106382977) internal successors, (115), 47 states have internal predecessors, (115), 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 40 [2024-10-13 22:13:05,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:13:05,436 INFO L225 Difference]: With dead ends: 73 [2024-10-13 22:13:05,436 INFO L226 Difference]: Without dead ends: 49 [2024-10-13 22:13:05,437 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=488, Invalid=3052, Unknown=0, NotChecked=0, Total=3540 [2024-10-13 22:13:05,438 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 63 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-13 22:13:05,438 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 117 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-13 22:13:05,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-13 22:13:05,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2024-10-13 22:13:05,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 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) [2024-10-13 22:13:05,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2024-10-13 22:13:05,443 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 40 [2024-10-13 22:13:05,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:13:05,443 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2024-10-13 22:13:05,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.4468085106382977) internal successors, (115), 47 states have internal predecessors, (115), 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) [2024-10-13 22:13:05,443 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2024-10-13 22:13:05,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-13 22:13:05,444 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:13:05,444 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:13:05,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-13 22:13:05,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-13 22:13:05,647 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:13:05,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:13:05,648 INFO L85 PathProgramCache]: Analyzing trace with hash -958491317, now seen corresponding path program 10 times [2024-10-13 22:13:05,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:13:05,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145700023] [2024-10-13 22:13:05,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:13:05,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:13:05,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:13:06,089 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:13:06,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:13:06,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145700023] [2024-10-13 22:13:06,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145700023] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:13:06,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769382975] [2024-10-13 22:13:06,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 22:13:06,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:13:06,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:13:06,093 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:13:06,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-13 22:13:06,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 22:13:06,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:13:06,212 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-13 22:13:06,216 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:13:06,397 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 19 treesize of output 1 [2024-10-13 22:13:06,442 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-10-13 22:13:06,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-10-13 22:13:06,679 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 19 treesize of output 7 [2024-10-13 22:13:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:13:06,706 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:13:11,014 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 25 treesize of output 23 [2024-10-13 22:13:11,017 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 54 treesize of output 50 [2024-10-13 22:13:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:13:11,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769382975] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:13:11,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:13:11,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 46 [2024-10-13 22:13:11,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519391257] [2024-10-13 22:13:11,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:13:11,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-10-13 22:13:11,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:13:11,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-10-13 22:13:11,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1916, Unknown=0, NotChecked=0, Total=2070 [2024-10-13 22:13:11,230 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 46 states, 46 states have (on average 2.6956521739130435) internal successors, (124), 46 states have internal predecessors, (124), 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) [2024-10-13 22:13:11,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:13:11,806 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2024-10-13 22:13:11,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-13 22:13:11,806 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.6956521739130435) internal successors, (124), 46 states have internal predecessors, (124), 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 43 [2024-10-13 22:13:11,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:13:11,807 INFO L225 Difference]: With dead ends: 51 [2024-10-13 22:13:11,807 INFO L226 Difference]: Without dead ends: 49 [2024-10-13 22:13:11,807 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=221, Invalid=2535, Unknown=0, NotChecked=0, Total=2756 [2024-10-13 22:13:11,808 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 29 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-13 22:13:11,808 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 181 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-13 22:13:11,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-13 22:13:11,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2024-10-13 22:13:11,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 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) [2024-10-13 22:13:11,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2024-10-13 22:13:11,813 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 43 [2024-10-13 22:13:11,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:13:11,813 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2024-10-13 22:13:11,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.6956521739130435) internal successors, (124), 46 states have internal predecessors, (124), 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) [2024-10-13 22:13:11,814 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2024-10-13 22:13:11,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-13 22:13:11,814 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:13:11,814 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:13:11,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-13 22:13:12,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-13 22:13:12,019 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:13:12,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:13:12,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1466963863, now seen corresponding path program 11 times [2024-10-13 22:13:12,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:13:12,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997101556] [2024-10-13 22:13:12,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:13:12,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:13:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:13:12,567 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:13:12,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:13:12,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997101556] [2024-10-13 22:13:12,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997101556] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:13:12,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812724272] [2024-10-13 22:13:12,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 22:13:12,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:13:12,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:13:12,570 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:13:12,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-13 22:13:12,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-10-13 22:13:12,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:13:12,721 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-10-13 22:13:12,722 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:13:13,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 22:13:13,353 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 15 treesize of output 7 [2024-10-13 22:13:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:13:13,384 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:13:13,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-10-13 22:13:13,680 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 24 treesize of output 20 [2024-10-13 22:13:13,945 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:13:13,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812724272] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:13:13,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:13:13,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 49 [2024-10-13 22:13:13,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598443390] [2024-10-13 22:13:13,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:13:13,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-10-13 22:13:13,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:13:13,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-10-13 22:13:13,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2210, Unknown=0, NotChecked=0, Total=2352 [2024-10-13 22:13:13,947 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 49 states, 49 states have (on average 2.7142857142857144) internal successors, (133), 49 states have internal predecessors, (133), 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) [2024-10-13 22:13:14,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:13:14,865 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2024-10-13 22:13:14,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-13 22:13:14,866 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.7142857142857144) internal successors, (133), 49 states have internal predecessors, (133), 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 46 [2024-10-13 22:13:14,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:13:14,866 INFO L225 Difference]: With dead ends: 85 [2024-10-13 22:13:14,866 INFO L226 Difference]: Without dead ends: 83 [2024-10-13 22:13:14,867 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=257, Invalid=3903, Unknown=0, NotChecked=0, Total=4160 [2024-10-13 22:13:14,867 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 1306 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-13 22:13:14,868 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 302 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1306 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-13 22:13:14,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-10-13 22:13:14,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2024-10-13 22:13:14,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 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) [2024-10-13 22:13:14,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2024-10-13 22:13:14,876 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 46 [2024-10-13 22:13:14,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:13:14,876 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2024-10-13 22:13:14,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.7142857142857144) internal successors, (133), 49 states have internal predecessors, (133), 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) [2024-10-13 22:13:14,876 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2024-10-13 22:13:14,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-13 22:13:14,877 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:13:14,877 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:13:14,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-13 22:13:15,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-13 22:13:15,081 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:13:15,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:13:15,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1980328722, now seen corresponding path program 12 times [2024-10-13 22:13:15,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:13:15,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591301513] [2024-10-13 22:13:15,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:13:15,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:13:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:13:15,627 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:13:15,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:13:15,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591301513] [2024-10-13 22:13:15,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591301513] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:13:15,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004972915] [2024-10-13 22:13:15,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 22:13:15,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:13:15,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:13:15,633 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:13:15,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-13 22:13:15,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-10-13 22:13:15,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:13:15,787 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-10-13 22:13:15,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:13:15,836 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 [2024-10-13 22:13:15,912 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 11 [2024-10-13 22:13:15,933 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 11 [2024-10-13 22:13:15,994 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 11 [2024-10-13 22:13:16,010 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 11 [2024-10-13 22:13:16,057 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 11 [2024-10-13 22:13:16,069 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 11 [2024-10-13 22:13:16,120 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 11 [2024-10-13 22:13:16,158 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 11 [2024-10-13 22:13:16,206 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 11 [2024-10-13 22:13:16,218 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 11 [2024-10-13 22:13:16,273 INFO L349 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2024-10-13 22:13:16,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 17 [2024-10-13 22:13:16,331 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-10-13 22:13:16,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2024-10-13 22:13:16,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:13:16,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:13:16,529 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:13:16,529 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 34 treesize of output 36 [2024-10-13 22:13:17,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:13:17,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:13:17,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:13:17,086 INFO L349 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2024-10-13 22:13:17,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 16 [2024-10-13 22:13:17,116 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 12 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:13:17,117 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:13:26,961 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 77 treesize of output 75 [2024-10-13 22:13:27,109 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 1276887018 treesize of output 1275052010 [2024-10-13 22:13:28,672 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 30 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:13:28,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004972915] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:13:28,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:13:28,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 23] total 60 [2024-10-13 22:13:28,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663308530] [2024-10-13 22:13:28,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:13:28,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-10-13 22:13:28,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:13:28,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-10-13 22:13:28,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=3159, Unknown=2, NotChecked=0, Total=3540 [2024-10-13 22:13:28,677 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 60 states, 60 states have (on average 2.3666666666666667) internal successors, (142), 60 states have internal predecessors, (142), 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) [2024-10-13 22:13:45,187 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] [2024-10-13 22:13:51,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:13:51,716 INFO L93 Difference]: Finished difference Result 136 states and 143 transitions. [2024-10-13 22:13:51,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-10-13 22:13:51,717 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.3666666666666667) internal successors, (142), 60 states have internal predecessors, (142), 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 49 [2024-10-13 22:13:51,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:13:51,717 INFO L225 Difference]: With dead ends: 136 [2024-10-13 22:13:51,717 INFO L226 Difference]: Without dead ends: 56 [2024-10-13 22:13:51,720 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2376 ImplicationChecksByTransitivity, 26.9s TimeCoverageRelationStatistics Valid=1529, Invalid=10238, Unknown=5, NotChecked=0, Total=11772 [2024-10-13 22:13:51,720 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 169 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 1632 mSolverCounterSat, 132 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1632 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2024-10-13 22:13:51,720 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 229 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1632 Invalid, 3 Unknown, 0 Unchecked, 6.5s Time] [2024-10-13 22:13:51,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-10-13 22:13:51,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-10-13 22:13:51,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 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) [2024-10-13 22:13:51,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2024-10-13 22:13:51,729 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 49 [2024-10-13 22:13:51,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:13:51,729 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2024-10-13 22:13:51,729 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.3666666666666667) internal successors, (142), 60 states have internal predecessors, (142), 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) [2024-10-13 22:13:51,729 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2024-10-13 22:13:51,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-13 22:13:51,730 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:13:51,730 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:13:51,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-13 22:13:51,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:13:51,932 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:13:51,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:13:51,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1651551474, now seen corresponding path program 13 times [2024-10-13 22:13:51,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:13:51,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30275181] [2024-10-13 22:13:51,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:13:51,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:13:51,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:13:52,576 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 3 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:13:52,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:13:52,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30275181] [2024-10-13 22:13:52,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30275181] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:13:52,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946233986] [2024-10-13 22:13:52,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 22:13:52,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:13:52,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:13:52,578 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:13:52,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-13 22:13:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:13:52,701 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-10-13 22:13:52,704 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:13:53,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 22:13:53,069 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 11 [2024-10-13 22:13:53,078 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 11 [2024-10-13 22:13:53,125 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 11 [2024-10-13 22:13:53,132 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 11 [2024-10-13 22:13:53,182 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 11 [2024-10-13 22:13:53,595 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 15 treesize of output 7 [2024-10-13 22:13:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:13:53,633 INFO L311 TraceCheckSpWp]: Computing backward predicates...