./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/rewnif.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/array-tiling/rewnif.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 5ee21d1db2a363655b71bcb8ab92ef8d6b86a57a4ebbd79d98cb55c59d3ed1f5 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 09:06:38,176 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 09:06:38,259 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 09:06:38,264 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 09:06:38,265 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 09:06:38,297 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 09:06:38,298 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 09:06:38,299 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 09:06:38,300 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 09:06:38,301 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 09:06:38,302 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 09:06:38,302 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 09:06:38,303 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 09:06:38,304 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 09:06:38,305 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 09:06:38,305 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 09:06:38,305 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 09:06:38,306 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 09:06:38,306 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 09:06:38,306 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 09:06:38,306 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 09:06:38,307 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 09:06:38,308 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 09:06:38,308 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 09:06:38,308 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 09:06:38,308 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 09:06:38,309 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 09:06:38,309 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 09:06:38,309 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 09:06:38,309 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 09:06:38,310 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 09:06:38,310 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 09:06:38,310 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 09:06:38,310 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 09:06:38,311 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 09:06:38,311 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 09:06:38,311 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 09:06:38,312 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 09:06:38,312 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 09:06:38,312 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 09:06:38,312 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 09:06:38,313 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 09:06:38,313 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ee21d1db2a363655b71bcb8ab92ef8d6b86a57a4ebbd79d98cb55c59d3ed1f5 [2024-11-18 09:06:38,584 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 09:06:38,609 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 09:06:38,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 09:06:38,614 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 09:06:38,615 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 09:06:38,616 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/rewnif.c [2024-11-18 09:06:40,096 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 09:06:40,319 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 09:06:40,321 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rewnif.c [2024-11-18 09:06:40,334 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1efddbdb4/69cc7106e0f74e5099193c946f8ca7b3/FLAG20b865667 [2024-11-18 09:06:40,350 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1efddbdb4/69cc7106e0f74e5099193c946f8ca7b3 [2024-11-18 09:06:40,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 09:06:40,355 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 09:06:40,359 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 09:06:40,359 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 09:06:40,364 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 09:06:40,365 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:06:40" (1/1) ... [2024-11-18 09:06:40,366 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c6388cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:06:40, skipping insertion in model container [2024-11-18 09:06:40,366 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:06:40" (1/1) ... [2024-11-18 09:06:40,387 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 09:06:40,574 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rewnif.c[397,410] [2024-11-18 09:06:40,591 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 09:06:40,603 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 09:06:40,614 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rewnif.c[397,410] [2024-11-18 09:06:40,619 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 09:06:40,637 INFO L204 MainTranslator]: Completed translation [2024-11-18 09:06:40,638 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:06:40 WrapperNode [2024-11-18 09:06:40,638 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 09:06:40,639 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 09:06:40,639 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 09:06:40,640 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 09:06:40,646 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:06:40" (1/1) ... [2024-11-18 09:06:40,652 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:06:40" (1/1) ... [2024-11-18 09:06:40,667 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2024-11-18 09:06:40,668 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 09:06:40,671 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 09:06:40,672 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 09:06:40,672 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 09:06:40,680 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:06:40" (1/1) ... [2024-11-18 09:06:40,680 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:06:40" (1/1) ... [2024-11-18 09:06:40,682 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:06:40" (1/1) ... [2024-11-18 09:06:40,693 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-18 09:06:40,693 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:06:40" (1/1) ... [2024-11-18 09:06:40,694 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:06:40" (1/1) ... [2024-11-18 09:06:40,698 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:06:40" (1/1) ... [2024-11-18 09:06:40,704 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:06:40" (1/1) ... [2024-11-18 09:06:40,705 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:06:40" (1/1) ... [2024-11-18 09:06:40,706 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:06:40" (1/1) ... [2024-11-18 09:06:40,711 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 09:06:40,713 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 09:06:40,713 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 09:06:40,713 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 09:06:40,714 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:06:40" (1/1) ... [2024-11-18 09:06:40,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 09:06:40,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:06:40,753 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) [2024-11-18 09:06:40,758 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 [2024-11-18 09:06:40,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 09:06:40,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 09:06:40,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-18 09:06:40,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-18 09:06:40,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-18 09:06:40,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-18 09:06:40,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 09:06:40,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 09:06:40,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-18 09:06:40,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-18 09:06:40,887 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 09:06:40,889 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 09:06:41,060 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-11-18 09:06:41,060 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 09:06:41,073 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 09:06:41,073 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-18 09:06:41,074 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:06:41 BoogieIcfgContainer [2024-11-18 09:06:41,074 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 09:06:41,077 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 09:06:41,079 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 09:06:41,083 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 09:06:41,084 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 09:06:40" (1/3) ... [2024-11-18 09:06:41,085 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b7d87fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:06:41, skipping insertion in model container [2024-11-18 09:06:41,085 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:06:40" (2/3) ... [2024-11-18 09:06:41,086 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b7d87fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:06:41, skipping insertion in model container [2024-11-18 09:06:41,086 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:06:41" (3/3) ... [2024-11-18 09:06:41,087 INFO L112 eAbstractionObserver]: Analyzing ICFG rewnif.c [2024-11-18 09:06:41,106 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 09:06:41,106 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 09:06:41,158 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 09:06:41,165 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;@686fa25c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 09:06:41,165 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 09:06:41,169 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 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) [2024-11-18 09:06:41,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-18 09:06:41,174 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:06:41,174 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:06:41,175 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:06:41,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:06:41,179 INFO L85 PathProgramCache]: Analyzing trace with hash 133671584, now seen corresponding path program 1 times [2024-11-18 09:06:41,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:06:41,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190822685] [2024-11-18 09:06:41,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:06:41,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:06:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:06:41,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:41,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:06:41,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190822685] [2024-11-18 09:06:41,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190822685] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 09:06:41,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 09:06:41,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-18 09:06:41,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504211768] [2024-11-18 09:06:41,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 09:06:41,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-18 09:06:41,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:06:41,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-18 09:06:41,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-18 09:06:41,419 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 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 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2024-11-18 09:06:41,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:06:41,440 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2024-11-18 09:06:41,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-18 09:06:41,442 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-18 09:06:41,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:06:41,447 INFO L225 Difference]: With dead ends: 31 [2024-11-18 09:06:41,447 INFO L226 Difference]: Without dead ends: 14 [2024-11-18 09:06:41,450 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 [2024-11-18 09:06:41,453 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 09:06:41,455 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 09:06:41,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-11-18 09:06:41,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-11-18 09:06:41,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:06:41,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2024-11-18 09:06:41,480 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2024-11-18 09:06:41,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:06:41,481 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2024-11-18 09:06:41,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2024-11-18 09:06:41,481 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2024-11-18 09:06:41,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-18 09:06:41,482 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:06:41,482 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:06:41,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-18 09:06:41,482 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:06:41,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:06:41,483 INFO L85 PathProgramCache]: Analyzing trace with hash 121665811, now seen corresponding path program 1 times [2024-11-18 09:06:41,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:06:41,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407308105] [2024-11-18 09:06:41,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:06:41,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:06:41,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:06:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:41,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:06:41,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407308105] [2024-11-18 09:06:41,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407308105] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 09:06:41,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 09:06:41,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 09:06:41,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663151559] [2024-11-18 09:06:41,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 09:06:41,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 09:06:41,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:06:41,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 09:06:41,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 09:06:41,619 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2024-11-18 09:06:41,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:06:41,652 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2024-11-18 09:06:41,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 09:06:41,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-18 09:06:41,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:06:41,653 INFO L225 Difference]: With dead ends: 29 [2024-11-18 09:06:41,653 INFO L226 Difference]: Without dead ends: 18 [2024-11-18 09:06:41,654 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 [2024-11-18 09:06:41,655 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 09:06:41,656 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 09:06:41,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-18 09:06:41,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2024-11-18 09:06:41,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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) [2024-11-18 09:06:41,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-11-18 09:06:41,661 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2024-11-18 09:06:41,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:06:41,661 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-11-18 09:06:41,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2024-11-18 09:06:41,662 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-11-18 09:06:41,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-18 09:06:41,662 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:06:41,662 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:06:41,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-18 09:06:41,663 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:06:41,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:06:41,664 INFO L85 PathProgramCache]: Analyzing trace with hash 729197006, now seen corresponding path program 1 times [2024-11-18 09:06:41,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:06:41,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444107080] [2024-11-18 09:06:41,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:06:41,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:06:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:06:41,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:41,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:06:41,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444107080] [2024-11-18 09:06:41,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444107080] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:06:41,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649040948] [2024-11-18 09:06:41,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:06:41,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:06:41,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:06:41,815 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) [2024-11-18 09:06:41,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 09:06:41,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:06:41,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-18 09:06:41,903 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:06:42,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:42,019 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:06:42,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:42,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649040948] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:06:42,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:06:42,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-18 09:06:42,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765111567] [2024-11-18 09:06:42,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:06:42,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-18 09:06:42,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:06:42,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-18 09:06:42,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-11-18 09:06:42,072 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:06:42,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:06:42,149 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2024-11-18 09:06:42,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-18 09:06:42,150 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-18 09:06:42,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:06:42,151 INFO L225 Difference]: With dead ends: 34 [2024-11-18 09:06:42,153 INFO L226 Difference]: Without dead ends: 27 [2024-11-18 09:06:42,153 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2024-11-18 09:06:42,154 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:06:42,155 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 18 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:06:42,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-18 09:06:42,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2024-11-18 09:06:42,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:06:42,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2024-11-18 09:06:42,165 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2024-11-18 09:06:42,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:06:42,165 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2024-11-18 09:06:42,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:06:42,166 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2024-11-18 09:06:42,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-18 09:06:42,166 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:06:42,167 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:06:42,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-18 09:06:42,371 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 [2024-11-18 09:06:42,372 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:06:42,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:06:42,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1021157689, now seen corresponding path program 1 times [2024-11-18 09:06:42,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:06:42,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77940104] [2024-11-18 09:06:42,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:06:42,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:06:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:06:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:42,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:06:42,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77940104] [2024-11-18 09:06:42,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77940104] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:06:42,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786237165] [2024-11-18 09:06:42,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:06:42,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:06:42,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:06:42,851 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) [2024-11-18 09:06:42,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 09:06:42,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:06:42,899 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-18 09:06:42,901 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:06:42,950 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 [2024-11-18 09:06:43,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:06:43,010 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 21 treesize of output 20 [2024-11-18 09:06:43,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:43,164 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:06:43,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-18 09:06:43,297 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 22 treesize of output 20 [2024-11-18 09:06:43,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 09:06:43,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786237165] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:06:43,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:06:43,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2024-11-18 09:06:43,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781479616] [2024-11-18 09:06:43,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:06:43,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-18 09:06:43,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:06:43,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-18 09:06:43,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-11-18 09:06:43,320 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:06:43,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:06:43,505 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2024-11-18 09:06:43,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-18 09:06:43,506 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-18 09:06:43,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:06:43,508 INFO L225 Difference]: With dead ends: 30 [2024-11-18 09:06:43,509 INFO L226 Difference]: Without dead ends: 28 [2024-11-18 09:06:43,509 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2024-11-18 09:06:43,510 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:06:43,510 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 34 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:06:43,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-18 09:06:43,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2024-11-18 09:06:43,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:06:43,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2024-11-18 09:06:43,518 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2024-11-18 09:06:43,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:06:43,518 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2024-11-18 09:06:43,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:06:43,518 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2024-11-18 09:06:43,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-18 09:06:43,519 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:06:43,519 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:06:43,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-18 09:06:43,723 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 [2024-11-18 09:06:43,724 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:06:43,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:06:43,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1566850755, now seen corresponding path program 1 times [2024-11-18 09:06:43,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:06:43,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946854098] [2024-11-18 09:06:43,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:06:43,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:06:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:06:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:43,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:06:43,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946854098] [2024-11-18 09:06:43,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946854098] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:06:43,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365124954] [2024-11-18 09:06:43,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:06:43,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:06:43,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:06:43,989 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) [2024-11-18 09:06:43,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 09:06:44,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:06:44,045 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-18 09:06:44,047 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:06:44,118 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 [2024-11-18 09:06:44,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:44,225 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:06:44,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-18 09:06:44,310 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 20 treesize of output 16 [2024-11-18 09:06:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:44,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365124954] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:06:44,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:06:44,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2024-11-18 09:06:44,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524963832] [2024-11-18 09:06:44,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:06:44,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-18 09:06:44,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:06:44,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-18 09:06:44,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-11-18 09:06:44,323 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 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) [2024-11-18 09:06:44,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:06:44,552 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2024-11-18 09:06:44,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-18 09:06:44,553 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 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 20 [2024-11-18 09:06:44,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:06:44,557 INFO L225 Difference]: With dead ends: 59 [2024-11-18 09:06:44,558 INFO L226 Difference]: Without dead ends: 57 [2024-11-18 09:06:44,558 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2024-11-18 09:06:44,559 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 09:06:44,559 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 129 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 09:06:44,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-18 09:06:44,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 37. [2024-11-18 09:06:44,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2024-11-18 09:06:44,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2024-11-18 09:06:44,571 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 20 [2024-11-18 09:06:44,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:06:44,571 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2024-11-18 09:06:44,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 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) [2024-11-18 09:06:44,572 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2024-11-18 09:06:44,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-18 09:06:44,572 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:06:44,572 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:06:44,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-18 09:06:44,773 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 [2024-11-18 09:06:44,773 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:06:44,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:06:44,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1995245389, now seen corresponding path program 2 times [2024-11-18 09:06:44,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:06:44,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790401424] [2024-11-18 09:06:44,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 09:06:44,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:06:44,790 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 09:06:44,790 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:06:44,866 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:44,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:06:44,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790401424] [2024-11-18 09:06:44,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790401424] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:06:44,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830525332] [2024-11-18 09:06:44,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 09:06:44,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:06:44,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:06:44,869 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) [2024-11-18 09:06:44,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-18 09:06:44,925 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 09:06:44,926 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:06:44,926 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-18 09:06:44,928 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:06:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:45,006 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:06:45,067 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:45,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830525332] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:06:45,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:06:45,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2024-11-18 09:06:45,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383230195] [2024-11-18 09:06:45,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:06:45,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-18 09:06:45,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:06:45,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-18 09:06:45,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-11-18 09:06:45,069 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 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) [2024-11-18 09:06:45,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:06:45,178 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2024-11-18 09:06:45,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-18 09:06:45,178 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-18 09:06:45,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:06:45,179 INFO L225 Difference]: With dead ends: 85 [2024-11-18 09:06:45,179 INFO L226 Difference]: Without dead ends: 47 [2024-11-18 09:06:45,180 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2024-11-18 09:06:45,180 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:06:45,181 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 48 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:06:45,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-18 09:06:45,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2024-11-18 09:06:45,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 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) [2024-11-18 09:06:45,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2024-11-18 09:06:45,187 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 24 [2024-11-18 09:06:45,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:06:45,187 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2024-11-18 09:06:45,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 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) [2024-11-18 09:06:45,187 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2024-11-18 09:06:45,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-18 09:06:45,188 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:06:45,188 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:06:45,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-18 09:06:45,388 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 [2024-11-18 09:06:45,389 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:06:45,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:06:45,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1364521933, now seen corresponding path program 3 times [2024-11-18 09:06:45,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:06:45,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389966750] [2024-11-18 09:06:45,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 09:06:45,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:06:45,422 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-18 09:06:45,424 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:06:46,321 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:46,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:06:46,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389966750] [2024-11-18 09:06:46,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389966750] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:06:46,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296231411] [2024-11-18 09:06:46,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 09:06:46,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:06:46,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:06:46,325 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) [2024-11-18 09:06:46,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-18 09:06:46,399 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-18 09:06:46,399 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:06:46,401 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-18 09:06:46,406 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:06:46,465 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 [2024-11-18 09:06:46,533 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 [2024-11-18 09:06:46,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-18 09:06:46,641 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:06:46,642 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 26 treesize of output 28 [2024-11-18 09:06:46,827 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:46,827 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:06:47,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2024-11-18 09:06:47,070 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 254 treesize of output 246 [2024-11-18 09:06:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:47,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296231411] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:06:47,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:06:47,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2024-11-18 09:06:47,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075902666] [2024-11-18 09:06:47,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:06:47,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-18 09:06:47,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:06:47,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-18 09:06:47,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=795, Unknown=0, NotChecked=0, Total=992 [2024-11-18 09:06:47,168 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 states have internal predecessors, (77), 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) [2024-11-18 09:06:47,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:06:47,911 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2024-11-18 09:06:47,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-18 09:06:47,912 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 states have internal predecessors, (77), 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 [2024-11-18 09:06:47,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:06:47,912 INFO L225 Difference]: With dead ends: 84 [2024-11-18 09:06:47,912 INFO L226 Difference]: Without dead ends: 82 [2024-11-18 09:06:47,913 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=510, Invalid=1940, Unknown=0, NotChecked=0, Total=2450 [2024-11-18 09:06:47,914 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 132 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 09:06:47,914 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 180 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 09:06:47,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-18 09:06:47,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 53. [2024-11-18 09:06:47,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 52 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) [2024-11-18 09:06:47,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2024-11-18 09:06:47,928 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 28 [2024-11-18 09:06:47,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:06:47,930 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2024-11-18 09:06:47,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 states have internal predecessors, (77), 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) [2024-11-18 09:06:47,930 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2024-11-18 09:06:47,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-18 09:06:47,932 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:06:47,932 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:06:47,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-18 09:06:48,135 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 [2024-11-18 09:06:48,136 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:06:48,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:06:48,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1191072622, now seen corresponding path program 4 times [2024-11-18 09:06:48,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:06:48,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369788365] [2024-11-18 09:06:48,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 09:06:48,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:06:48,161 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 09:06:48,165 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:06:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:48,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:06:48,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369788365] [2024-11-18 09:06:48,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369788365] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:06:48,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15735007] [2024-11-18 09:06:48,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 09:06:48,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:06:48,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:06:48,514 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) [2024-11-18 09:06:48,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-18 09:06:48,588 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 09:06:48,589 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:06:48,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-18 09:06:48,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:06:48,641 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 [2024-11-18 09:06:49,005 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-11-18 09:06:49,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 35 [2024-11-18 09:06:49,057 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:49,058 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:06:49,295 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 [2024-11-18 09:06:49,299 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 [2024-11-18 09:06:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:49,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15735007] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:06:49,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:06:49,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2024-11-18 09:06:49,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740114981] [2024-11-18 09:06:49,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:06:49,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-18 09:06:49,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:06:49,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-18 09:06:49,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2024-11-18 09:06:49,344 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 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) [2024-11-18 09:06:49,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:06:49,769 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2024-11-18 09:06:49,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-18 09:06:49,769 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 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 [2024-11-18 09:06:49,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:06:49,770 INFO L225 Difference]: With dead ends: 86 [2024-11-18 09:06:49,770 INFO L226 Difference]: Without dead ends: 67 [2024-11-18 09:06:49,771 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2024-11-18 09:06:49,771 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 09:06:49,772 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 69 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 09:06:49,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-18 09:06:49,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 53. [2024-11-18 09:06:49,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 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) [2024-11-18 09:06:49,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2024-11-18 09:06:49,786 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 28 [2024-11-18 09:06:49,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:06:49,788 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2024-11-18 09:06:49,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 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) [2024-11-18 09:06:49,788 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2024-11-18 09:06:49,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-18 09:06:49,789 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:06:49,789 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:06:49,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-18 09:06:49,989 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 [2024-11-18 09:06:49,990 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:06:49,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:06:49,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1789893985, now seen corresponding path program 5 times [2024-11-18 09:06:49,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:06:49,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414107269] [2024-11-18 09:06:49,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 09:06:49,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:06:50,023 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-18 09:06:50,023 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:06:50,509 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 5 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:50,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:06:50,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414107269] [2024-11-18 09:06:50,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414107269] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:06:50,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113858512] [2024-11-18 09:06:50,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 09:06:50,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:06:50,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:06:50,512 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) [2024-11-18 09:06:50,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-18 09:06:50,627 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-18 09:06:50,628 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:06:50,630 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-18 09:06:50,634 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:06:50,719 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 [2024-11-18 09:06:50,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:06:50,775 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 31 treesize of output 11 [2024-11-18 09:06:50,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:06:50,784 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 21 treesize of output 20 [2024-11-18 09:06:50,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:06:50,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:06:50,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:06:50,882 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:06:50,883 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 40 treesize of output 23 [2024-11-18 09:06:50,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:06:50,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:06:50,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:06:50,935 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:06:50,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2024-11-18 09:06:51,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:06:51,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:06:51,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:06:51,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:06:51,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:06:51,085 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:06:51,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 48 [2024-11-18 09:06:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:51,496 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:06:51,778 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 31 treesize of output 29 [2024-11-18 09:06:51,781 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 422 treesize of output 406 [2024-11-18 09:06:51,806 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-18 09:06:51,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113858512] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:06:51,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:06:51,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 32 [2024-11-18 09:06:51,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524567844] [2024-11-18 09:06:51,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:06:51,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-18 09:06:51,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:06:51,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-18 09:06:51,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2024-11-18 09:06:51,809 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 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) [2024-11-18 09:06:52,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:06:52,545 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2024-11-18 09:06:52,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-18 09:06:52,546 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 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 [2024-11-18 09:06:52,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:06:52,546 INFO L225 Difference]: With dead ends: 89 [2024-11-18 09:06:52,547 INFO L226 Difference]: Without dead ends: 87 [2024-11-18 09:06:52,547 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 57 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=335, Invalid=1471, Unknown=0, NotChecked=0, Total=1806 [2024-11-18 09:06:52,548 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 85 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-18 09:06:52,548 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 282 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-18 09:06:52,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-18 09:06:52,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 53. [2024-11-18 09:06:52,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 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) [2024-11-18 09:06:52,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2024-11-18 09:06:52,557 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 40 [2024-11-18 09:06:52,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:06:52,558 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2024-11-18 09:06:52,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 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) [2024-11-18 09:06:52,558 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2024-11-18 09:06:52,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-18 09:06:52,559 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:06:52,559 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:06:52,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-18 09:06:52,759 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 [2024-11-18 09:06:52,760 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:06:52,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:06:52,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1942581397, now seen corresponding path program 6 times [2024-11-18 09:06:52,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:06:52,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647141949] [2024-11-18 09:06:52,760 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 09:06:52,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:06:52,784 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-18 09:06:52,784 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:06:52,909 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:52,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:06:52,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647141949] [2024-11-18 09:06:52,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647141949] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:06:52,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610093421] [2024-11-18 09:06:52,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 09:06:52,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:06:52,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:06:52,911 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) [2024-11-18 09:06:52,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-18 09:06:52,994 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-18 09:06:52,994 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:06:52,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-18 09:06:52,997 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:06:53,117 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:53,117 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:06:53,214 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:53,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610093421] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:06:53,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:06:53,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2024-11-18 09:06:53,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744074898] [2024-11-18 09:06:53,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:06:53,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-18 09:06:53,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:06:53,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-18 09:06:53,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2024-11-18 09:06:53,216 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:06:53,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:06:53,326 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2024-11-18 09:06:53,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-18 09:06:53,326 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-18 09:06:53,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:06:53,327 INFO L225 Difference]: With dead ends: 98 [2024-11-18 09:06:53,327 INFO L226 Difference]: Without dead ends: 71 [2024-11-18 09:06:53,327 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 65 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2024-11-18 09:06:53,328 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 39 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:06:53,328 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 63 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:06:53,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-18 09:06:53,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2024-11-18 09:06:53,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 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) [2024-11-18 09:06:53,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2024-11-18 09:06:53,337 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 40 [2024-11-18 09:06:53,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:06:53,338 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2024-11-18 09:06:53,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:06:53,338 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2024-11-18 09:06:53,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-18 09:06:53,339 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:06:53,339 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:06:53,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-18 09:06:53,539 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 [2024-11-18 09:06:53,540 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:06:53,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:06:53,540 INFO L85 PathProgramCache]: Analyzing trace with hash -470542059, now seen corresponding path program 7 times [2024-11-18 09:06:53,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:06:53,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672058706] [2024-11-18 09:06:53,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 09:06:53,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:06:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:06:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 1 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:54,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:06:54,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672058706] [2024-11-18 09:06:54,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672058706] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:06:54,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509013223] [2024-11-18 09:06:54,044 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 09:06:54,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:06:54,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:06:54,046 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) [2024-11-18 09:06:54,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-18 09:06:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:06:54,126 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-18 09:06:54,130 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:06:54,192 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 [2024-11-18 09:06:54,221 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 [2024-11-18 09:06:54,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-18 09:06:54,286 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:06:54,287 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 26 treesize of output 28 [2024-11-18 09:06:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:54,538 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:06:54,729 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 36 treesize of output 34 [2024-11-18 09:06:54,730 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 98 treesize of output 94 [2024-11-18 09:06:54,851 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 8 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:54,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509013223] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:06:54,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:06:54,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 37 [2024-11-18 09:06:54,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667043843] [2024-11-18 09:06:54,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:06:54,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-18 09:06:54,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:06:54,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-18 09:06:54,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1082, Unknown=0, NotChecked=0, Total=1332 [2024-11-18 09:06:54,854 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 37 states have internal predecessors, (109), 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) [2024-11-18 09:06:55,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:06:55,403 INFO L93 Difference]: Finished difference Result 115 states and 122 transitions. [2024-11-18 09:06:55,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-18 09:06:55,404 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 37 states have internal predecessors, (109), 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 44 [2024-11-18 09:06:55,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:06:55,405 INFO L225 Difference]: With dead ends: 115 [2024-11-18 09:06:55,405 INFO L226 Difference]: Without dead ends: 113 [2024-11-18 09:06:55,405 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=447, Invalid=2003, Unknown=0, NotChecked=0, Total=2450 [2024-11-18 09:06:55,406 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 80 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 09:06:55,406 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 314 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 09:06:55,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-18 09:06:55,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2024-11-18 09:06:55,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 68 states have internal predecessors, (73), 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) [2024-11-18 09:06:55,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2024-11-18 09:06:55,419 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 44 [2024-11-18 09:06:55,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:06:55,419 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2024-11-18 09:06:55,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 37 states have internal predecessors, (109), 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) [2024-11-18 09:06:55,419 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2024-11-18 09:06:55,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-18 09:06:55,420 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:06:55,420 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:06:55,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-18 09:06:55,621 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 [2024-11-18 09:06:55,621 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:06:55,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:06:55,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1613367984, now seen corresponding path program 8 times [2024-11-18 09:06:55,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:06:55,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698051382] [2024-11-18 09:06:55,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 09:06:55,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:06:55,636 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 09:06:55,637 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:06:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:56,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:06:56,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698051382] [2024-11-18 09:06:56,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698051382] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:06:56,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891517587] [2024-11-18 09:06:56,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 09:06:56,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:06:56,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:06:56,044 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) [2024-11-18 09:06:56,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-18 09:06:56,121 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 09:06:56,121 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:06:56,122 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-18 09:06:56,124 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:06:56,238 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 [2024-11-18 09:06:56,448 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:56,449 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:06:56,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-18 09:06:56,634 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 20 treesize of output 16 [2024-11-18 09:06:56,655 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:56,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891517587] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:06:56,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:06:56,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 34 [2024-11-18 09:06:56,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668555241] [2024-11-18 09:06:56,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:06:56,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-18 09:06:56,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:06:56,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-18 09:06:56,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2024-11-18 09:06:56,658 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 34 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 34 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:06:57,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:06:57,364 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2024-11-18 09:06:57,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-18 09:06:57,365 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 34 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-11-18 09:06:57,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:06:57,366 INFO L225 Difference]: With dead ends: 153 [2024-11-18 09:06:57,366 INFO L226 Difference]: Without dead ends: 123 [2024-11-18 09:06:57,367 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=362, Invalid=2608, Unknown=0, NotChecked=0, Total=2970 [2024-11-18 09:06:57,367 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 70 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 09:06:57,367 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 315 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 09:06:57,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-18 09:06:57,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 69. [2024-11-18 09:06:57,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 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) [2024-11-18 09:06:57,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2024-11-18 09:06:57,381 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 44 [2024-11-18 09:06:57,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:06:57,381 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2024-11-18 09:06:57,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 34 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:06:57,381 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2024-11-18 09:06:57,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-18 09:06:57,382 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:06:57,382 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:06:57,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-18 09:06:57,586 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 [2024-11-18 09:06:57,586 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:06:57,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:06:57,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1856864897, now seen corresponding path program 9 times [2024-11-18 09:06:57,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:06:57,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740750280] [2024-11-18 09:06:57,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 09:06:57,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:06:57,621 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-18 09:06:57,622 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:06:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 5 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:06:58,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:06:58,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740750280] [2024-11-18 09:06:58,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740750280] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:06:58,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410218895] [2024-11-18 09:06:58,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 09:06:58,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:06:58,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:06:58,238 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) [2024-11-18 09:06:58,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-18 09:06:58,476 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-18 09:06:58,477 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:06:58,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-18 09:06:58,483 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:06:58,627 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 [2024-11-18 09:06:58,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:06:58,689 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 31 treesize of output 11 [2024-11-18 09:06:58,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:06:58,699 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 21 treesize of output 20 [2024-11-18 09:06:58,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:06:58,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:06:58,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:06:58,800 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:06:58,800 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 40 treesize of output 23 [2024-11-18 09:06:58,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:06:58,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:06:58,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:06:58,857 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:06:58,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2024-11-18 09:06:59,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:06:59,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:06:59,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:06:59,049 INFO L349 Elim1Store]: treesize reduction 52, result has 33.3 percent of original size [2024-11-18 09:06:59,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2024-11-18 09:06:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 4 proven. 147 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 09:06:59,885 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:07:00,981 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 31 treesize of output 29 [2024-11-18 09:07:00,989 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 422 treesize of output 406 [2024-11-18 09:07:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-18 09:07:01,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410218895] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:07:01,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:07:01,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 20] total 47 [2024-11-18 09:07:01,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260430890] [2024-11-18 09:07:01,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:07:01,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-18 09:07:01,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:07:01,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-18 09:07:01,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1853, Unknown=1, NotChecked=0, Total=2162 [2024-11-18 09:07:01,029 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 47 states, 47 states have (on average 2.9361702127659575) internal successors, (138), 47 states have internal predecessors, (138), 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) [2024-11-18 09:07:02,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:07:02,751 INFO L93 Difference]: Finished difference Result 131 states and 134 transitions. [2024-11-18 09:07:02,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-18 09:07:02,752 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.9361702127659575) internal successors, (138), 47 states have internal predecessors, (138), 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 56 [2024-11-18 09:07:02,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:07:02,752 INFO L225 Difference]: With dead ends: 131 [2024-11-18 09:07:02,752 INFO L226 Difference]: Without dead ends: 129 [2024-11-18 09:07:02,753 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 80 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1529 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=626, Invalid=3929, Unknown=1, NotChecked=0, Total=4556 [2024-11-18 09:07:02,754 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 114 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 1710 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 1750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-18 09:07:02,754 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 721 Invalid, 1750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1710 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-18 09:07:02,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-18 09:07:02,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 69. [2024-11-18 09:07:02,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 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) [2024-11-18 09:07:02,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2024-11-18 09:07:02,768 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 56 [2024-11-18 09:07:02,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:07:02,769 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2024-11-18 09:07:02,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.9361702127659575) internal successors, (138), 47 states have internal predecessors, (138), 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) [2024-11-18 09:07:02,769 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2024-11-18 09:07:02,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-18 09:07:02,769 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:07:02,770 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:07:02,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-18 09:07:02,973 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 [2024-11-18 09:07:02,974 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:07:02,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:07:02,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1215546761, now seen corresponding path program 10 times [2024-11-18 09:07:02,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:07:02,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310487917] [2024-11-18 09:07:02,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 09:07:02,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:07:03,002 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 09:07:03,002 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:07:03,197 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:07:03,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:07:03,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310487917] [2024-11-18 09:07:03,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310487917] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:07:03,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575058171] [2024-11-18 09:07:03,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 09:07:03,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:07:03,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:07:03,200 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) [2024-11-18 09:07:03,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-18 09:07:03,365 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 09:07:03,365 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:07:03,367 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-18 09:07:03,368 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:07:03,553 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:07:03,553 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:07:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:07:03,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575058171] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:07:03,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:07:03,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 23 [2024-11-18 09:07:03,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536568011] [2024-11-18 09:07:03,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:07:03,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-18 09:07:03,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:07:03,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-18 09:07:03,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2024-11-18 09:07:03,695 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 23 states, 23 states have (on average 3.5652173913043477) internal successors, (82), 23 states have internal predecessors, (82), 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) [2024-11-18 09:07:03,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:07:03,854 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2024-11-18 09:07:03,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-18 09:07:03,854 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.5652173913043477) internal successors, (82), 23 states have internal predecessors, (82), 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 56 [2024-11-18 09:07:03,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:07:03,855 INFO L225 Difference]: With dead ends: 130 [2024-11-18 09:07:03,855 INFO L226 Difference]: Without dead ends: 95 [2024-11-18 09:07:03,855 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 92 SyntacticMatches, 13 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=692, Unknown=0, NotChecked=0, Total=930 [2024-11-18 09:07:03,856 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 71 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:07:03,856 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 100 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:07:03,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-18 09:07:03,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 69. [2024-11-18 09:07:03,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 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) [2024-11-18 09:07:03,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2024-11-18 09:07:03,869 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 56 [2024-11-18 09:07:03,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:07:03,870 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2024-11-18 09:07:03,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.5652173913043477) internal successors, (82), 23 states have internal predecessors, (82), 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) [2024-11-18 09:07:03,870 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2024-11-18 09:07:03,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-18 09:07:03,870 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:07:03,871 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:07:03,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-18 09:07:04,071 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 [2024-11-18 09:07:04,071 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:07:04,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:07:04,072 INFO L85 PathProgramCache]: Analyzing trace with hash -2011531273, now seen corresponding path program 11 times [2024-11-18 09:07:04,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:07:04,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802521372] [2024-11-18 09:07:04,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 09:07:04,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:07:04,117 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-11-18 09:07:04,117 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:07:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 1 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:07:04,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:07:04,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802521372] [2024-11-18 09:07:04,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802521372] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:07:04,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564951260] [2024-11-18 09:07:04,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 09:07:04,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:07:04,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:07:04,667 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) [2024-11-18 09:07:04,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-18 09:07:04,912 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-11-18 09:07:04,912 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:07:04,914 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-18 09:07:04,916 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:07:05,051 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 [2024-11-18 09:07:05,100 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 [2024-11-18 09:07:05,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-18 09:07:05,175 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:07:05,175 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 26 treesize of output 28 [2024-11-18 09:07:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:07:05,586 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:07:05,813 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 36 treesize of output 34 [2024-11-18 09:07:05,814 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 98 treesize of output 94 [2024-11-18 09:07:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 8 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:07:06,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564951260] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:07:06,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:07:06,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 46 [2024-11-18 09:07:06,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567344690] [2024-11-18 09:07:06,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:07:06,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-18 09:07:06,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:07:06,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-18 09:07:06,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1797, Unknown=0, NotChecked=0, Total=2070 [2024-11-18 09:07:06,116 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 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) [2024-11-18 09:07:07,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:07:07,238 INFO L93 Difference]: Finished difference Result 147 states and 154 transitions. [2024-11-18 09:07:07,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-18 09:07:07,239 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 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 60 [2024-11-18 09:07:07,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:07:07,240 INFO L225 Difference]: With dead ends: 147 [2024-11-18 09:07:07,240 INFO L226 Difference]: Without dead ends: 145 [2024-11-18 09:07:07,241 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 87 SyntacticMatches, 8 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1283 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=524, Invalid=3766, Unknown=0, NotChecked=0, Total=4290 [2024-11-18 09:07:07,241 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 125 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 1933 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 1968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-18 09:07:07,242 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 697 Invalid, 1968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1933 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-18 09:07:07,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-11-18 09:07:07,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 85. [2024-11-18 09:07:07,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0595238095238095) internal successors, (89), 84 states have internal predecessors, (89), 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) [2024-11-18 09:07:07,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2024-11-18 09:07:07,261 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 60 [2024-11-18 09:07:07,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:07:07,261 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2024-11-18 09:07:07,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 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) [2024-11-18 09:07:07,262 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2024-11-18 09:07:07,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-18 09:07:07,262 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:07:07,263 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:07:07,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-18 09:07:07,463 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 [2024-11-18 09:07:07,463 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:07:07,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:07:07,464 INFO L85 PathProgramCache]: Analyzing trace with hash -836376270, now seen corresponding path program 12 times [2024-11-18 09:07:07,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:07:07,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813011067] [2024-11-18 09:07:07,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 09:07:07,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:07:07,491 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-18 09:07:07,491 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:07:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 40 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:07:08,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:07:08,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813011067] [2024-11-18 09:07:08,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813011067] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:07:08,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645576411] [2024-11-18 09:07:08,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 09:07:08,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:07:08,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:07:08,028 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) [2024-11-18 09:07:08,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-18 09:07:08,258 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-18 09:07:08,258 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:07:08,261 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-18 09:07:08,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:07:08,436 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 18 treesize of output 14 [2024-11-18 09:07:08,803 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-11-18 09:07:08,803 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 26 treesize of output 12 [2024-11-18 09:07:08,827 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 66 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:07:08,827 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:07:09,259 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 [2024-11-18 09:07:09,262 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 [2024-11-18 09:07:09,437 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 60 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:07:09,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645576411] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:07:09,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:07:09,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 47 [2024-11-18 09:07:09,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456871455] [2024-11-18 09:07:09,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:07:09,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-18 09:07:09,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:07:09,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-18 09:07:09,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1805, Unknown=0, NotChecked=0, Total=2162 [2024-11-18 09:07:09,440 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 47 states, 47 states have (on average 3.127659574468085) internal successors, (147), 47 states have internal predecessors, (147), 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) [2024-11-18 09:07:10,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:07:10,428 INFO L93 Difference]: Finished difference Result 150 states and 154 transitions. [2024-11-18 09:07:10,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-18 09:07:10,429 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.127659574468085) internal successors, (147), 47 states have internal predecessors, (147), 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 60 [2024-11-18 09:07:10,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:07:10,430 INFO L225 Difference]: With dead ends: 150 [2024-11-18 09:07:10,430 INFO L226 Difference]: Without dead ends: 115 [2024-11-18 09:07:10,431 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 86 SyntacticMatches, 7 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1894 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=938, Invalid=5382, Unknown=0, NotChecked=0, Total=6320 [2024-11-18 09:07:10,432 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 103 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 09:07:10,432 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 305 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 09:07:10,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-18 09:07:10,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 85. [2024-11-18 09:07:10,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 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) [2024-11-18 09:07:10,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2024-11-18 09:07:10,454 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 60 [2024-11-18 09:07:10,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:07:10,455 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2024-11-18 09:07:10,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.127659574468085) internal successors, (147), 47 states have internal predecessors, (147), 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) [2024-11-18 09:07:10,455 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2024-11-18 09:07:10,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-18 09:07:10,456 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:07:10,456 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:07:10,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-18 09:07:10,656 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 [2024-11-18 09:07:10,657 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:07:10,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:07:10,657 INFO L85 PathProgramCache]: Analyzing trace with hash 247919715, now seen corresponding path program 13 times [2024-11-18 09:07:10,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:07:10,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959459023] [2024-11-18 09:07:10,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 09:07:10,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:07:10,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:07:11,401 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 5 proven. 257 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:07:11,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:07:11,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959459023] [2024-11-18 09:07:11,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959459023] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:07:11,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573607416] [2024-11-18 09:07:11,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 09:07:11,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:07:11,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:07:11,404 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) [2024-11-18 09:07:11,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-18 09:07:11,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:07:11,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-18 09:07:11,516 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:07:11,736 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 [2024-11-18 09:07:11,789 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 [2024-11-18 09:07:11,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-18 09:07:11,865 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:07:11,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2024-11-18 09:07:11,873 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:07:11,873 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 26 treesize of output 28 [2024-11-18 09:07:11,959 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:07:11,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2024-11-18 09:07:12,455 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:07:12,456 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:07:12,802 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 46 treesize of output 44 [2024-11-18 09:07:12,804 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 202 treesize of output 198 [2024-11-18 09:07:13,188 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 18 proven. 244 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:07:13,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573607416] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:07:13,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:07:13,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 24] total 57 [2024-11-18 09:07:13,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528266711] [2024-11-18 09:07:13,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:07:13,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-18 09:07:13,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:07:13,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-18 09:07:13,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=2769, Unknown=0, NotChecked=0, Total=3192 [2024-11-18 09:07:13,190 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 57 states, 57 states have (on average 3.2280701754385963) internal successors, (184), 57 states have internal predecessors, (184), 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) [2024-11-18 09:07:14,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:07:14,562 INFO L93 Difference]: Finished difference Result 184 states and 193 transitions. [2024-11-18 09:07:14,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-18 09:07:14,562 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.2280701754385963) internal successors, (184), 57 states have internal predecessors, (184), 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 72 [2024-11-18 09:07:14,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:07:14,563 INFO L225 Difference]: With dead ends: 184 [2024-11-18 09:07:14,563 INFO L226 Difference]: Without dead ends: 182 [2024-11-18 09:07:14,565 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 104 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2031 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=767, Invalid=5553, Unknown=0, NotChecked=0, Total=6320 [2024-11-18 09:07:14,566 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 192 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 2270 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 2323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-18 09:07:14,566 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 891 Invalid, 2323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 2270 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-18 09:07:14,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-11-18 09:07:14,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 105. [2024-11-18 09:07:14,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0576923076923077) internal successors, (110), 104 states have internal predecessors, (110), 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) [2024-11-18 09:07:14,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 110 transitions. [2024-11-18 09:07:14,589 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 110 transitions. Word has length 72 [2024-11-18 09:07:14,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:07:14,589 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 110 transitions. [2024-11-18 09:07:14,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.2280701754385963) internal successors, (184), 57 states have internal predecessors, (184), 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) [2024-11-18 09:07:14,589 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 110 transitions. [2024-11-18 09:07:14,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-18 09:07:14,590 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:07:14,590 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:07:14,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-18 09:07:14,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-18 09:07:14,791 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:07:14,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:07:14,791 INFO L85 PathProgramCache]: Analyzing trace with hash -20883879, now seen corresponding path program 14 times [2024-11-18 09:07:14,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:07:14,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378580258] [2024-11-18 09:07:14,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 09:07:14,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:07:14,810 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 09:07:14,810 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:07:15,080 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 99 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:07:15,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:07:15,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378580258] [2024-11-18 09:07:15,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378580258] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:07:15,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965528245] [2024-11-18 09:07:15,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 09:07:15,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:07:15,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:07:15,082 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:07:15,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-18 09:07:15,194 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 09:07:15,194 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:07:15,196 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-18 09:07:15,197 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:07:15,462 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:07:15,463 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:07:15,620 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:07:15,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965528245] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:07:15,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:07:15,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 31 [2024-11-18 09:07:15,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828800568] [2024-11-18 09:07:15,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:07:15,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-18 09:07:15,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:07:15,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-18 09:07:15,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=697, Unknown=0, NotChecked=0, Total=930 [2024-11-18 09:07:15,622 INFO L87 Difference]: Start difference. First operand 105 states and 110 transitions. Second operand has 31 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 31 states have internal predecessors, (116), 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) [2024-11-18 09:07:15,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:07:15,831 INFO L93 Difference]: Finished difference Result 212 states and 217 transitions. [2024-11-18 09:07:15,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-18 09:07:15,831 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 31 states have internal predecessors, (116), 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 72 [2024-11-18 09:07:15,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:07:15,832 INFO L225 Difference]: With dead ends: 212 [2024-11-18 09:07:15,832 INFO L226 Difference]: Without dead ends: 169 [2024-11-18 09:07:15,833 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 117 SyntacticMatches, 16 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=1182, Unknown=0, NotChecked=0, Total=1560 [2024-11-18 09:07:15,833 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 94 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:07:15,834 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 148 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:07:15,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-18 09:07:15,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 105. [2024-11-18 09:07:15,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0480769230769231) internal successors, (109), 104 states have internal predecessors, (109), 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) [2024-11-18 09:07:15,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2024-11-18 09:07:15,855 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 72 [2024-11-18 09:07:15,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:07:15,855 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2024-11-18 09:07:15,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 31 states have internal predecessors, (116), 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) [2024-11-18 09:07:15,856 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2024-11-18 09:07:15,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-18 09:07:15,856 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:07:15,856 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:07:15,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-18 09:07:16,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-18 09:07:16,057 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:07:16,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:07:16,057 INFO L85 PathProgramCache]: Analyzing trace with hash 609496852, now seen corresponding path program 15 times [2024-11-18 09:07:16,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:07:16,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74100464] [2024-11-18 09:07:16,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 09:07:16,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:07:16,150 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-18 09:07:16,151 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:07:16,813 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 84 proven. 197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:07:16,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:07:16,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74100464] [2024-11-18 09:07:16,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74100464] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:07:16,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318602682] [2024-11-18 09:07:16,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 09:07:16,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:07:16,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:07:16,815 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:07:16,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-18 09:07:17,133 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-18 09:07:17,133 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:07:17,135 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-18 09:07:17,137 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:07:17,181 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 [2024-11-18 09:07:17,882 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-18 09:07:17,882 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 [2024-11-18 09:07:17,905 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 120 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:07:17,905 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:07:18,499 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 [2024-11-18 09:07:18,502 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 [2024-11-18 09:07:18,587 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 112 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:07:18,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318602682] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:07:18,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:07:18,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 50 [2024-11-18 09:07:18,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117937395] [2024-11-18 09:07:18,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:07:18,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-18 09:07:18,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:07:18,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-18 09:07:18,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=2031, Unknown=0, NotChecked=0, Total=2450 [2024-11-18 09:07:18,590 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 50 states, 50 states have (on average 3.14) internal successors, (157), 50 states have internal predecessors, (157), 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) [2024-11-18 09:07:20,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:07:20,567 INFO L93 Difference]: Finished difference Result 182 states and 188 transitions. [2024-11-18 09:07:20,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-11-18 09:07:20,568 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.14) internal successors, (157), 50 states have internal predecessors, (157), 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 76 [2024-11-18 09:07:20,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:07:20,568 INFO L225 Difference]: With dead ends: 182 [2024-11-18 09:07:20,568 INFO L226 Difference]: Without dead ends: 85 [2024-11-18 09:07:20,571 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 117 SyntacticMatches, 9 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3671 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1811, Invalid=9961, Unknown=0, NotChecked=0, Total=11772 [2024-11-18 09:07:20,571 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 253 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 09:07:20,572 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 296 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 09:07:20,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-18 09:07:20,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2024-11-18 09:07:20,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 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) [2024-11-18 09:07:20,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2024-11-18 09:07:20,590 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 76 [2024-11-18 09:07:20,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:07:20,590 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2024-11-18 09:07:20,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.14) internal successors, (157), 50 states have internal predecessors, (157), 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) [2024-11-18 09:07:20,591 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2024-11-18 09:07:20,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-18 09:07:20,591 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:07:20,591 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:07:20,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-18 09:07:20,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:07:20,792 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:07:20,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:07:20,792 INFO L85 PathProgramCache]: Analyzing trace with hash 846076367, now seen corresponding path program 16 times [2024-11-18 09:07:20,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:07:20,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635582208] [2024-11-18 09:07:20,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 09:07:20,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:07:20,830 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 09:07:20,831 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:07:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 13 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:07:21,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:07:21,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635582208] [2024-11-18 09:07:21,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635582208] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:07:21,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221205715] [2024-11-18 09:07:21,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 09:07:21,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:07:21,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:07:21,762 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:07:21,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-18 09:07:22,124 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 09:07:22,125 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:07:22,128 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-18 09:07:22,130 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:07:22,336 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 [2024-11-18 09:07:22,400 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 [2024-11-18 09:07:22,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-18 09:07:22,482 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:07:22,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2024-11-18 09:07:22,491 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:07:22,492 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 26 treesize of output 28 [2024-11-18 09:07:22,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:07:22,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:07:22,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:07:22,578 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:07:22,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 31 [2024-11-18 09:07:22,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:07:22,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:07:22,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:07:22,597 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:07:22,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 40 [2024-11-18 09:07:22,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:07:22,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:07:22,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:07:22,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:07:22,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:07:22,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:07:22,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:07:22,747 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:07:22,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 52 [2024-11-18 09:07:23,864 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 3 proven. 371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:07:23,865 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:07:30,525 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 59 treesize of output 57 [2024-11-18 09:07:30,535 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 106998 treesize of output 106486 [2024-11-18 09:07:30,965 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 7 proven. 365 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-18 09:07:30,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221205715] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:07:30,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:07:30,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29, 29] total 68 [2024-11-18 09:07:30,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352672504] [2024-11-18 09:07:30,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:07:30,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-18 09:07:30,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:07:30,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-18 09:07:30,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=4072, Unknown=3, NotChecked=0, Total=4556 [2024-11-18 09:07:30,967 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 68 states, 68 states have (on average 3.1029411764705883) internal successors, (211), 68 states have internal predecessors, (211), 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) [2024-11-18 09:07:32,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:07:32,103 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2024-11-18 09:07:32,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-18 09:07:32,104 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.1029411764705883) internal successors, (211), 68 states have internal predecessors, (211), 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 84 [2024-11-18 09:07:32,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:07:32,104 INFO L225 Difference]: With dead ends: 90 [2024-11-18 09:07:32,104 INFO L226 Difference]: Without dead ends: 0 [2024-11-18 09:07:32,105 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 118 SyntacticMatches, 13 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2268 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=600, Invalid=5403, Unknown=3, NotChecked=0, Total=6006 [2024-11-18 09:07:32,105 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 5 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 1836 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-18 09:07:32,105 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 336 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1836 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-18 09:07:32,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-18 09:07:32,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-18 09:07:32,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:07:32,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-18 09:07:32,106 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 84 [2024-11-18 09:07:32,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:07:32,107 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-18 09:07:32,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.1029411764705883) internal successors, (211), 68 states have internal predecessors, (211), 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) [2024-11-18 09:07:32,107 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-18 09:07:32,107 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-18 09:07:32,110 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-18 09:07:32,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-18 09:07:32,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:07:32,313 INFO L407 BasicCegarLoop]: Path program histogram: [16, 1, 1, 1, 1] [2024-11-18 09:07:32,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.