./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/mbpr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d 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/mbpr2.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 a98ea70d5d9f752732070144a56514c68e9571f139726211e2f0ade721d6c5f3 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 09:53:31,655 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 09:53:31,728 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 09:53:31,734 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 09:53:31,735 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 09:53:31,763 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 09:53:31,763 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 09:53:31,764 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 09:53:31,764 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 09:53:31,764 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 09:53:31,765 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 09:53:31,765 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 09:53:31,766 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 09:53:31,768 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 09:53:31,768 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 09:53:31,769 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 09:53:31,769 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 09:53:31,769 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 09:53:31,770 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 09:53:31,770 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 09:53:31,770 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 09:53:31,774 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 09:53:31,774 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 09:53:31,774 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 09:53:31,774 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 09:53:31,774 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 09:53:31,775 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 09:53:31,775 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 09:53:31,775 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 09:53:31,775 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 09:53:31,775 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 09:53:31,776 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 09:53:31,776 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 09:53:31,776 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 09:53:31,776 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 09:53:31,776 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 09:53:31,777 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 09:53:31,777 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 09:53:31,777 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 09:53:31,778 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 09:53:31,779 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 09:53:31,779 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 09:53:31,779 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a98ea70d5d9f752732070144a56514c68e9571f139726211e2f0ade721d6c5f3 [2024-11-08 09:53:32,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 09:53:32,108 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 09:53:32,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 09:53:32,114 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 09:53:32,114 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 09:53:32,115 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/mbpr2.c [2024-11-08 09:53:33,575 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 09:53:33,784 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 09:53:33,784 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mbpr2.c [2024-11-08 09:53:33,791 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcf8b4b31/9a8fa16219174dd8b975eafacf8f5758/FLAGdf091d4c5 [2024-11-08 09:53:34,168 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcf8b4b31/9a8fa16219174dd8b975eafacf8f5758 [2024-11-08 09:53:34,171 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 09:53:34,172 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 09:53:34,173 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 09:53:34,173 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 09:53:34,179 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 09:53:34,179 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 09:53:34" (1/1) ... [2024-11-08 09:53:34,180 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10387846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:53:34, skipping insertion in model container [2024-11-08 09:53:34,181 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 09:53:34" (1/1) ... [2024-11-08 09:53:34,204 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 09:53:34,404 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/mbpr2.c[396,409] [2024-11-08 09:53:34,431 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 09:53:34,443 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 09:53:34,457 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/mbpr2.c[396,409] [2024-11-08 09:53:34,473 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 09:53:34,490 INFO L204 MainTranslator]: Completed translation [2024-11-08 09:53:34,491 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:53:34 WrapperNode [2024-11-08 09:53:34,491 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 09:53:34,492 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 09:53:34,492 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 09:53:34,492 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 09:53:34,499 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:53:34" (1/1) ... [2024-11-08 09:53:34,506 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:53:34" (1/1) ... [2024-11-08 09:53:34,537 INFO L138 Inliner]: procedures = 15, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 92 [2024-11-08 09:53:34,538 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 09:53:34,539 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 09:53:34,539 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 09:53:34,539 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 09:53:34,552 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:53:34" (1/1) ... [2024-11-08 09:53:34,552 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:53:34" (1/1) ... [2024-11-08 09:53:34,558 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:53:34" (1/1) ... [2024-11-08 09:53:34,570 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 8, 10]. 50 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 6 writes are split as follows [0, 0, 6]. [2024-11-08 09:53:34,570 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:53:34" (1/1) ... [2024-11-08 09:53:34,571 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:53:34" (1/1) ... [2024-11-08 09:53:34,580 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:53:34" (1/1) ... [2024-11-08 09:53:34,585 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:53:34" (1/1) ... [2024-11-08 09:53:34,586 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:53:34" (1/1) ... [2024-11-08 09:53:34,591 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:53:34" (1/1) ... [2024-11-08 09:53:34,593 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 09:53:34,594 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 09:53:34,594 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 09:53:34,594 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 09:53:34,595 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:53:34" (1/1) ... [2024-11-08 09:53:34,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 09:53:34,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:53:34,625 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) [2024-11-08 09:53:34,627 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 [2024-11-08 09:53:34,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 09:53:34,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 09:53:34,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 09:53:34,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-08 09:53:34,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 09:53:34,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 09:53:34,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 09:53:34,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-08 09:53:34,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 09:53:34,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 09:53:34,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 09:53:34,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 09:53:34,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-08 09:53:34,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 09:53:34,748 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 09:53:34,750 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 09:53:34,991 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-11-08 09:53:34,991 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 09:53:35,010 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 09:53:35,011 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-08 09:53:35,011 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 09:53:35 BoogieIcfgContainer [2024-11-08 09:53:35,011 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 09:53:35,013 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 09:53:35,013 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 09:53:35,017 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 09:53:35,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 09:53:34" (1/3) ... [2024-11-08 09:53:35,019 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@788ea5b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 09:53:35, skipping insertion in model container [2024-11-08 09:53:35,019 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:53:34" (2/3) ... [2024-11-08 09:53:35,020 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@788ea5b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 09:53:35, skipping insertion in model container [2024-11-08 09:53:35,020 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 09:53:35" (3/3) ... [2024-11-08 09:53:35,022 INFO L112 eAbstractionObserver]: Analyzing ICFG mbpr2.c [2024-11-08 09:53:35,038 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 09:53:35,038 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 09:53:35,105 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 09:53:35,116 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;@7904ecbd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 09:53:35,116 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 09:53:35,121 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:53:35,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-08 09:53:35,128 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:53:35,129 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:53:35,130 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:53:35,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:53:35,136 INFO L85 PathProgramCache]: Analyzing trace with hash -669443655, now seen corresponding path program 1 times [2024-11-08 09:53:35,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:53:35,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634901487] [2024-11-08 09:53:35,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:53:35,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:53:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:53:35,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:53:35,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:53:35,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634901487] [2024-11-08 09:53:35,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634901487] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 09:53:35,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 09:53:35,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 09:53:35,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816989798] [2024-11-08 09:53:35,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 09:53:35,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-08 09:53:35,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:53:35,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-08 09:53:35,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 09:53:35,379 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:53:35,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:53:35,392 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2024-11-08 09:53:35,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-08 09:53:35,394 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-08 09:53:35,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:53:35,401 INFO L225 Difference]: With dead ends: 53 [2024-11-08 09:53:35,401 INFO L226 Difference]: Without dead ends: 24 [2024-11-08 09:53:35,404 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 [2024-11-08 09:53:35,407 INFO L432 NwaCegarLoop]: 36 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, 36 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 [2024-11-08 09:53:35,409 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 09:53:35,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-08 09:53:35,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-08 09:53:35,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:53:35,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2024-11-08 09:53:35,441 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2024-11-08 09:53:35,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:53:35,442 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2024-11-08 09:53:35,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:53:35,443 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2024-11-08 09:53:35,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-08 09:53:35,444 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:53:35,444 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:53:35,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 09:53:35,445 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:53:35,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:53:35,445 INFO L85 PathProgramCache]: Analyzing trace with hash -893920799, now seen corresponding path program 1 times [2024-11-08 09:53:35,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:53:35,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077804812] [2024-11-08 09:53:35,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:53:35,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:53:35,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:53:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:53:35,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:53:35,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077804812] [2024-11-08 09:53:35,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077804812] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 09:53:35,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 09:53:35,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 09:53:35,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147890403] [2024-11-08 09:53:35,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 09:53:35,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 09:53:35,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:53:35,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 09:53:35,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 09:53:35,635 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:53:35,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:53:35,665 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2024-11-08 09:53:35,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 09:53:35,666 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-08 09:53:35,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:53:35,667 INFO L225 Difference]: With dead ends: 28 [2024-11-08 09:53:35,667 INFO L226 Difference]: Without dead ends: 26 [2024-11-08 09:53:35,667 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 09:53:35,669 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 09:53:35,669 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 09:53:35,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-08 09:53:35,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-08 09:53:35,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:53:35,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2024-11-08 09:53:35,674 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 15 [2024-11-08 09:53:35,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:53:35,674 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2024-11-08 09:53:35,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:53:35,675 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2024-11-08 09:53:35,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-08 09:53:35,675 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:53:35,676 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:53:35,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 09:53:35,676 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:53:35,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:53:35,679 INFO L85 PathProgramCache]: Analyzing trace with hash -893861217, now seen corresponding path program 1 times [2024-11-08 09:53:35,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:53:35,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292537505] [2024-11-08 09:53:35,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:53:35,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:53:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:53:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:53:35,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:53:35,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292537505] [2024-11-08 09:53:35,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292537505] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 09:53:35,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 09:53:35,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 09:53:35,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773760290] [2024-11-08 09:53:35,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 09:53:35,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 09:53:35,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:53:35,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 09:53:35,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-08 09:53:35,986 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:53:36,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:53:36,062 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2024-11-08 09:53:36,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 09:53:36,062 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-08 09:53:36,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:53:36,063 INFO L225 Difference]: With dead ends: 50 [2024-11-08 09:53:36,063 INFO L226 Difference]: Without dead ends: 34 [2024-11-08 09:53:36,064 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-08 09:53:36,065 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 41 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 09:53:36,065 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 22 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 09:53:36,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-08 09:53:36,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2024-11-08 09:53:36,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 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) [2024-11-08 09:53:36,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2024-11-08 09:53:36,070 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 15 [2024-11-08 09:53:36,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:53:36,071 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2024-11-08 09:53:36,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:53:36,071 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2024-11-08 09:53:36,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-08 09:53:36,072 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:53:36,072 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:53:36,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 09:53:36,073 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:53:36,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:53:36,073 INFO L85 PathProgramCache]: Analyzing trace with hash -815951211, now seen corresponding path program 1 times [2024-11-08 09:53:36,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:53:36,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041958520] [2024-11-08 09:53:36,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:53:36,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:53:36,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:53:36,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 09:53:36,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:53:36,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041958520] [2024-11-08 09:53:36,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041958520] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 09:53:36,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 09:53:36,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 09:53:36,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631567461] [2024-11-08 09:53:36,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 09:53:36,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 09:53:36,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:53:36,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 09:53:36,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 09:53:36,176 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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) [2024-11-08 09:53:36,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:53:36,191 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2024-11-08 09:53:36,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 09:53:36,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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 23 [2024-11-08 09:53:36,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:53:36,192 INFO L225 Difference]: With dead ends: 43 [2024-11-08 09:53:36,193 INFO L226 Difference]: Without dead ends: 28 [2024-11-08 09:53:36,193 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 09:53:36,194 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 09:53:36,201 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 09:53:36,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-08 09:53:36,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-08 09:53:36,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 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) [2024-11-08 09:53:36,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2024-11-08 09:53:36,211 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 23 [2024-11-08 09:53:36,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:53:36,211 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2024-11-08 09:53:36,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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) [2024-11-08 09:53:36,212 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2024-11-08 09:53:36,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-08 09:53:36,212 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:53:36,212 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:53:36,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-08 09:53:36,213 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:53:36,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:53:36,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1208978221, now seen corresponding path program 1 times [2024-11-08 09:53:36,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:53:36,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859435661] [2024-11-08 09:53:36,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:53:36,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:53:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:53:36,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:53:36,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:53:36,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859435661] [2024-11-08 09:53:36,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859435661] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:53:36,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340456904] [2024-11-08 09:53:36,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:53:36,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:53:36,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:53:36,907 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) [2024-11-08 09:53:36,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 09:53:36,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:53:36,988 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-08 09:53:36,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:53:37,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 09:53:37,160 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 [2024-11-08 09:53:37,232 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 [2024-11-08 09:53:37,280 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:53:37,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2024-11-08 09:53:37,396 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:53:37,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2024-11-08 09:53:37,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:53:37,431 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:53:37,541 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 17 treesize of output 15 [2024-11-08 09:53:37,547 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 [2024-11-08 09:53:37,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 09:53:37,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340456904] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:53:37,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:53:37,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 7] total 20 [2024-11-08 09:53:37,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823172700] [2024-11-08 09:53:37,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:53:37,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 09:53:37,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:53:37,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 09:53:37,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2024-11-08 09:53:37,608 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:53:37,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:53:37,956 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2024-11-08 09:53:37,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 09:53:37,956 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-08 09:53:37,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:53:37,957 INFO L225 Difference]: With dead ends: 71 [2024-11-08 09:53:37,958 INFO L226 Difference]: Without dead ends: 50 [2024-11-08 09:53:37,959 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2024-11-08 09:53:37,960 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 135 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 09:53:37,961 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 115 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 09:53:37,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-08 09:53:37,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 30. [2024-11-08 09:53:37,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 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) [2024-11-08 09:53:37,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-11-08 09:53:37,970 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 23 [2024-11-08 09:53:37,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:53:37,971 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-11-08 09:53:37,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:53:37,972 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-11-08 09:53:37,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-08 09:53:37,974 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:53:37,974 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:53:37,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 09:53:38,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:53:38,176 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:53:38,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:53:38,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1368311994, now seen corresponding path program 1 times [2024-11-08 09:53:38,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:53:38,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141620211] [2024-11-08 09:53:38,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:53:38,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:53:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:53:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 09:53:38,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:53:38,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141620211] [2024-11-08 09:53:38,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141620211] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:53:38,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228570221] [2024-11-08 09:53:38,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:53:38,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:53:38,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:53:38,527 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) [2024-11-08 09:53:38,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 09:53:38,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:53:38,587 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-08 09:53:38,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:53:38,621 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 [2024-11-08 09:53:38,631 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:53:38,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2024-11-08 09:53:38,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 09:53:38,736 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:53:38,834 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 17 treesize of output 15 [2024-11-08 09:53:38,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-08 09:53:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 09:53:38,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228570221] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:53:38,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:53:38,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 18 [2024-11-08 09:53:38,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551790546] [2024-11-08 09:53:38,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:53:38,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-08 09:53:38,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:53:38,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-08 09:53:38,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-11-08 09:53:38,853 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 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) [2024-11-08 09:53:39,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:53:39,049 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2024-11-08 09:53:39,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 09:53:39,050 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-08 09:53:39,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:53:39,050 INFO L225 Difference]: With dead ends: 50 [2024-11-08 09:53:39,051 INFO L226 Difference]: Without dead ends: 48 [2024-11-08 09:53:39,051 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2024-11-08 09:53:39,052 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 49 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 09:53:39,052 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 85 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 09:53:39,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-08 09:53:39,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2024-11-08 09:53:39,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 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) [2024-11-08 09:53:39,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2024-11-08 09:53:39,059 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 29 [2024-11-08 09:53:39,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:53:39,059 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2024-11-08 09:53:39,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 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) [2024-11-08 09:53:39,060 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2024-11-08 09:53:39,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-08 09:53:39,062 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:53:39,063 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:53:39,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 09:53:39,263 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,SelfDestructingSolverStorable5 [2024-11-08 09:53:39,264 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:53:39,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:53:39,264 INFO L85 PathProgramCache]: Analyzing trace with hash 21305209, now seen corresponding path program 2 times [2024-11-08 09:53:39,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:53:39,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120481045] [2024-11-08 09:53:39,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:53:39,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:53:39,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:53:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 09:53:39,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:53:39,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120481045] [2024-11-08 09:53:39,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120481045] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:53:39,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912700456] [2024-11-08 09:53:39,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 09:53:39,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:53:39,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:53:39,525 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) [2024-11-08 09:53:39,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 09:53:39,596 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 09:53:39,596 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:53:39,598 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 09:53:39,600 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:53:39,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 09:53:39,931 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:53:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 09:53:40,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912700456] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:53:40,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:53:40,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2024-11-08 09:53:40,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150272042] [2024-11-08 09:53:40,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:53:40,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-08 09:53:40,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:53:40,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-08 09:53:40,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2024-11-08 09:53:40,105 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:53:40,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:53:40,348 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2024-11-08 09:53:40,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 09:53:40,348 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-08 09:53:40,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:53:40,349 INFO L225 Difference]: With dead ends: 97 [2024-11-08 09:53:40,349 INFO L226 Difference]: Without dead ends: 54 [2024-11-08 09:53:40,350 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2024-11-08 09:53:40,351 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 164 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 09:53:40,351 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 91 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 09:53:40,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-08 09:53:40,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2024-11-08 09:53:40,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:53:40,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2024-11-08 09:53:40,358 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 35 [2024-11-08 09:53:40,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:53:40,358 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2024-11-08 09:53:40,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:53:40,359 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2024-11-08 09:53:40,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-08 09:53:40,360 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:53:40,360 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:53:40,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 09:53:40,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:53:40,561 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:53:40,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:53:40,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1279882925, now seen corresponding path program 3 times [2024-11-08 09:53:40,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:53:40,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213008491] [2024-11-08 09:53:40,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:53:40,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:53:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:53:41,321 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 09:53:41,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:53:41,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213008491] [2024-11-08 09:53:41,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213008491] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:53:41,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050204707] [2024-11-08 09:53:41,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 09:53:41,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:53:41,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:53:41,325 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) [2024-11-08 09:53:41,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 09:53:41,399 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-08 09:53:41,400 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:53:41,401 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-08 09:53:41,406 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:53:41,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 09:53:41,561 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 [2024-11-08 09:53:41,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-11-08 09:53:41,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:53:41,665 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:53:41,665 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 3 case distinctions, treesize of input 42 treesize of output 36 [2024-11-08 09:53:41,770 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-11-08 09:53:41,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2024-11-08 09:53:41,845 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2024-11-08 09:53:41,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 53 treesize of output 50 [2024-11-08 09:53:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 09:53:42,338 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:53:42,757 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 37 treesize of output 33 [2024-11-08 09:53:42,761 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 43 treesize of output 35 [2024-11-08 09:53:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 09:53:42,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050204707] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:53:42,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:53:42,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 14] total 38 [2024-11-08 09:53:42,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218972452] [2024-11-08 09:53:42,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:53:42,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-08 09:53:42,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:53:42,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-08 09:53:42,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2024-11-08 09:53:42,957 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 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) [2024-11-08 09:53:44,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:53:44,047 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2024-11-08 09:53:44,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-08 09:53:44,048 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-11-08 09:53:44,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:53:44,049 INFO L225 Difference]: With dead ends: 76 [2024-11-08 09:53:44,049 INFO L226 Difference]: Without dead ends: 66 [2024-11-08 09:53:44,050 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=539, Invalid=2767, Unknown=0, NotChecked=0, Total=3306 [2024-11-08 09:53:44,050 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 172 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 09:53:44,051 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 173 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 09:53:44,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-08 09:53:44,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 50. [2024-11-08 09:53:44,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 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) [2024-11-08 09:53:44,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2024-11-08 09:53:44,058 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 43 [2024-11-08 09:53:44,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:53:44,058 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2024-11-08 09:53:44,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 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) [2024-11-08 09:53:44,059 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2024-11-08 09:53:44,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-08 09:53:44,059 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:53:44,060 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:53:44,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 09:53:44,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:53:44,264 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:53:44,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:53:44,264 INFO L85 PathProgramCache]: Analyzing trace with hash -833360480, now seen corresponding path program 4 times [2024-11-08 09:53:44,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:53:44,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747423579] [2024-11-08 09:53:44,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:53:44,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:53:44,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:53:44,860 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:53:44,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:53:44,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747423579] [2024-11-08 09:53:44,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747423579] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:53:44,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418071038] [2024-11-08 09:53:44,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 09:53:44,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:53:44,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:53:44,863 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) [2024-11-08 09:53:44,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 09:53:44,937 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 09:53:44,938 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:53:44,939 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-08 09:53:44,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:53:44,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 09:53:44,986 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:53:44,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 25 treesize of output 20 [2024-11-08 09:53:45,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-11-08 09:53:45,044 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:53:45,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 38 treesize of output 34 [2024-11-08 09:53:45,381 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 09:53:45,381 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:53:45,696 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 49 treesize of output 45 [2024-11-08 09:53:45,702 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:53:45,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 175 treesize of output 143 [2024-11-08 09:53:45,716 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 09:53:45,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418071038] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:53:45,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:53:45,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 13] total 37 [2024-11-08 09:53:45,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623169416] [2024-11-08 09:53:45,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:53:45,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-08 09:53:45,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:53:45,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-08 09:53:45,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1163, Unknown=0, NotChecked=0, Total=1332 [2024-11-08 09:53:45,719 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 37 states, 37 states have (on average 3.3513513513513513) internal successors, (124), 37 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:53:47,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:53:47,420 INFO L93 Difference]: Finished difference Result 184 states and 202 transitions. [2024-11-08 09:53:47,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-11-08 09:53:47,421 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.3513513513513513) internal successors, (124), 37 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-11-08 09:53:47,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:53:47,422 INFO L225 Difference]: With dead ends: 184 [2024-11-08 09:53:47,422 INFO L226 Difference]: Without dead ends: 155 [2024-11-08 09:53:47,424 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2580 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1308, Invalid=7434, Unknown=0, NotChecked=0, Total=8742 [2024-11-08 09:53:47,425 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 379 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 09:53:47,425 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 200 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 09:53:47,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-11-08 09:53:47,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 82. [2024-11-08 09:53:47,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0864197530864197) internal successors, (88), 81 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) [2024-11-08 09:53:47,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2024-11-08 09:53:47,436 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 49 [2024-11-08 09:53:47,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:53:47,437 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2024-11-08 09:53:47,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.3513513513513513) internal successors, (124), 37 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:53:47,437 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2024-11-08 09:53:47,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-08 09:53:47,439 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:53:47,439 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:53:47,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-08 09:53:47,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:53:47,644 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:53:47,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:53:47,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1991778899, now seen corresponding path program 5 times [2024-11-08 09:53:47,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:53:47,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670066205] [2024-11-08 09:53:47,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:53:47,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:53:47,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:53:48,038 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 33 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 09:53:48,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:53:48,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670066205] [2024-11-08 09:53:48,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670066205] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:53:48,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29860071] [2024-11-08 09:53:48,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 09:53:48,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:53:48,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:53:48,041 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) [2024-11-08 09:53:48,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 09:53:48,138 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-08 09:53:48,138 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:53:48,139 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 09:53:48,141 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:53:48,595 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 52 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 09:53:48,596 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:53:48,776 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 52 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 09:53:48,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29860071] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:53:48,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:53:48,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 34 [2024-11-08 09:53:48,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524245273] [2024-11-08 09:53:48,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:53:48,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-08 09:53:48,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:53:48,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-08 09:53:48,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2024-11-08 09:53:48,779 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand has 34 states, 34 states have (on average 4.147058823529412) internal successors, (141), 34 states have internal predecessors, (141), 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) [2024-11-08 09:53:48,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:53:48,995 INFO L93 Difference]: Finished difference Result 140 states and 150 transitions. [2024-11-08 09:53:48,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-08 09:53:48,996 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.147058823529412) internal successors, (141), 34 states have internal predecessors, (141), 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 55 [2024-11-08 09:53:48,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:53:48,997 INFO L225 Difference]: With dead ends: 140 [2024-11-08 09:53:48,998 INFO L226 Difference]: Without dead ends: 82 [2024-11-08 09:53:48,998 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=411, Invalid=1149, Unknown=0, NotChecked=0, Total=1560 [2024-11-08 09:53:48,999 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 290 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 09:53:48,999 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 158 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 09:53:49,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-08 09:53:49,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2024-11-08 09:53:49,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.08) internal successors, (81), 75 states have internal predecessors, (81), 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) [2024-11-08 09:53:49,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2024-11-08 09:53:49,009 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 55 [2024-11-08 09:53:49,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:53:49,009 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2024-11-08 09:53:49,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.147058823529412) internal successors, (141), 34 states have internal predecessors, (141), 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) [2024-11-08 09:53:49,009 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2024-11-08 09:53:49,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-08 09:53:49,010 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:53:49,010 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:53:49,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 09:53:49,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:53:49,211 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:53:49,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:53:49,212 INFO L85 PathProgramCache]: Analyzing trace with hash 200453767, now seen corresponding path program 6 times [2024-11-08 09:53:49,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:53:49,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342369151] [2024-11-08 09:53:49,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:53:49,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:53:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:53:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 09:53:50,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:53:50,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342369151] [2024-11-08 09:53:50,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342369151] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:53:50,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036374042] [2024-11-08 09:53:50,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 09:53:50,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:53:50,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:53:50,046 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) [2024-11-08 09:53:50,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 09:53:50,167 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-08 09:53:50,167 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:53:50,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-08 09:53:50,181 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:53:50,375 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 [2024-11-08 09:53:50,411 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:53:50,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2024-11-08 09:53:50,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:53:50,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-11-08 09:53:50,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:53:50,509 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:53:50,509 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 3 case distinctions, treesize of input 42 treesize of output 36 [2024-11-08 09:53:50,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:53:50,594 INFO L349 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2024-11-08 09:53:50,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2024-11-08 09:53:50,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:53:50,655 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2024-11-08 09:53:50,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 50 [2024-11-08 09:53:52,357 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-08 09:53:52,358 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:53:53,776 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 33 treesize of output 31 [2024-11-08 09:53:53,780 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 [2024-11-08 09:53:53,840 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 30 treesize of output 28 [2024-11-08 09:53:53,846 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 30 treesize of output 28 [2024-11-08 09:53:53,928 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 17 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-08 09:53:53,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036374042] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:53:53,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:53:53,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 13] total 40 [2024-11-08 09:53:53,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075115028] [2024-11-08 09:53:53,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:53:53,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-08 09:53:53,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:53:53,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-08 09:53:53,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1328, Unknown=5, NotChecked=0, Total=1560 [2024-11-08 09:53:53,931 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 40 states, 40 states have (on average 3.3) internal successors, (132), 40 states have internal predecessors, (132), 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) [2024-11-08 09:53:59,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 09:54:02,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.83s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 09:54:07,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.75s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 09:54:10,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 09:54:14,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.92s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 09:54:21,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 09:54:28,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 09:54:31,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.99s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 09:54:34,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 09:54:38,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 09:54:41,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.53s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 09:54:41,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:54:41,843 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2024-11-08 09:54:41,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-08 09:54:41,843 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.3) internal successors, (132), 40 states have internal predecessors, (132), 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 63 [2024-11-08 09:54:41,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:54:41,844 INFO L225 Difference]: With dead ends: 115 [2024-11-08 09:54:41,844 INFO L226 Difference]: Without dead ends: 93 [2024-11-08 09:54:41,846 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=1144, Invalid=5157, Unknown=19, NotChecked=0, Total=6320 [2024-11-08 09:54:41,846 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 391 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 113 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.6s IncrementalHoareTripleChecker+Time [2024-11-08 09:54:41,846 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 274 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 945 Invalid, 17 Unknown, 0 Unchecked, 36.6s Time] [2024-11-08 09:54:41,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-08 09:54:41,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 70. [2024-11-08 09:54:41,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 69 states have internal predecessors, (74), 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) [2024-11-08 09:54:41,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2024-11-08 09:54:41,858 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 63 [2024-11-08 09:54:41,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:54:41,859 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2024-11-08 09:54:41,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.3) internal successors, (132), 40 states have internal predecessors, (132), 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) [2024-11-08 09:54:41,859 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2024-11-08 09:54:41,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-08 09:54:41,862 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:54:41,862 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:54:41,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-08 09:54:42,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:54:42,067 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:54:42,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:54:42,067 INFO L85 PathProgramCache]: Analyzing trace with hash -811046728, now seen corresponding path program 7 times [2024-11-08 09:54:42,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:54:42,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310554897] [2024-11-08 09:54:42,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:54:42,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:54:42,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:54:42,719 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:54:42,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:54:42,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310554897] [2024-11-08 09:54:42,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310554897] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:54:42,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054277866] [2024-11-08 09:54:42,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 09:54:42,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:54:42,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:54:42,722 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) [2024-11-08 09:54:42,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 09:54:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:54:42,822 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-08 09:54:42,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:54:42,956 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 [2024-11-08 09:54:42,982 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:54:42,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2024-11-08 09:54:43,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:54:43,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-11-08 09:54:43,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:54:43,050 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:54:43,051 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 3 case distinctions, treesize of input 42 treesize of output 36 [2024-11-08 09:54:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 46 proven. 48 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 09:54:43,446 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:54:43,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-11-08 09:54:43,969 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 46 treesize of output 42 [2024-11-08 09:54:44,060 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 46 proven. 39 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-08 09:54:44,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054277866] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:54:44,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:54:44,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 37 [2024-11-08 09:54:44,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906393704] [2024-11-08 09:54:44,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:54:44,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-08 09:54:44,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:54:44,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-08 09:54:44,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2024-11-08 09:54:44,062 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 37 states, 37 states have (on average 4.54054054054054) internal successors, (168), 37 states have internal predecessors, (168), 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) [2024-11-08 09:54:45,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:54:45,202 INFO L93 Difference]: Finished difference Result 110 states and 119 transitions. [2024-11-08 09:54:45,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-08 09:54:45,203 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.54054054054054) internal successors, (168), 37 states have internal predecessors, (168), 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 69 [2024-11-08 09:54:45,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:54:45,203 INFO L225 Difference]: With dead ends: 110 [2024-11-08 09:54:45,204 INFO L226 Difference]: Without dead ends: 94 [2024-11-08 09:54:45,205 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=627, Invalid=3533, Unknown=0, NotChecked=0, Total=4160 [2024-11-08 09:54:45,205 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 192 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 09:54:45,205 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 291 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1119 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 09:54:45,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-08 09:54:45,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 76. [2024-11-08 09:54:45,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:54:45,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2024-11-08 09:54:45,215 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 69 [2024-11-08 09:54:45,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:54:45,215 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2024-11-08 09:54:45,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.54054054054054) internal successors, (168), 37 states have internal predecessors, (168), 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) [2024-11-08 09:54:45,216 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2024-11-08 09:54:45,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-08 09:54:45,216 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:54:45,217 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:54:45,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-08 09:54:45,417 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,SelfDestructingSolverStorable11 [2024-11-08 09:54:45,418 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:54:45,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:54:45,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1296547097, now seen corresponding path program 8 times [2024-11-08 09:54:45,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:54:45,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839833381] [2024-11-08 09:54:45,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:54:45,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:54:45,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:54:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 83 proven. 46 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 09:54:45,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:54:45,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839833381] [2024-11-08 09:54:45,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839833381] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:54:45,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423899320] [2024-11-08 09:54:45,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 09:54:45,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:54:45,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:54:45,899 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) [2024-11-08 09:54:45,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 09:54:45,999 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 09:54:45,999 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:54:46,001 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-08 09:54:46,002 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:54:46,683 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 114 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 09:54:46,683 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:54:46,965 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 114 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 09:54:46,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423899320] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:54:46,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:54:46,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 42 [2024-11-08 09:54:46,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014457436] [2024-11-08 09:54:46,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:54:46,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-08 09:54:46,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:54:46,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-08 09:54:46,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=1310, Unknown=0, NotChecked=0, Total=1722 [2024-11-08 09:54:46,967 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 42 states, 42 states have (on average 4.476190476190476) internal successors, (188), 42 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:54:47,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:54:47,300 INFO L93 Difference]: Finished difference Result 189 states and 197 transitions. [2024-11-08 09:54:47,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-08 09:54:47,301 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.476190476190476) internal successors, (188), 42 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2024-11-08 09:54:47,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:54:47,302 INFO L225 Difference]: With dead ends: 189 [2024-11-08 09:54:47,302 INFO L226 Difference]: Without dead ends: 90 [2024-11-08 09:54:47,303 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=589, Invalid=1763, Unknown=0, NotChecked=0, Total=2352 [2024-11-08 09:54:47,303 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 310 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 09:54:47,303 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 186 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 09:54:47,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-08 09:54:47,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2024-11-08 09:54:47,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 83 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) [2024-11-08 09:54:47,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2024-11-08 09:54:47,327 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 75 [2024-11-08 09:54:47,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:54:47,327 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2024-11-08 09:54:47,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.476190476190476) internal successors, (188), 42 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:54:47,328 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2024-11-08 09:54:47,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-08 09:54:47,328 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:54:47,328 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:54:47,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-08 09:54:47,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-08 09:54:47,529 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:54:47,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:54:47,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1725070363, now seen corresponding path program 9 times [2024-11-08 09:54:47,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:54:47,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151492476] [2024-11-08 09:54:47,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:54:47,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:54:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:54:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 12 proven. 130 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-08 09:54:48,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:54:48,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151492476] [2024-11-08 09:54:48,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151492476] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:54:48,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372360413] [2024-11-08 09:54:48,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 09:54:48,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:54:48,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:54:48,566 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) [2024-11-08 09:54:48,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 09:54:48,804 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-08 09:54:48,804 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:54:48,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-08 09:54:48,813 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:54:48,871 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 [2024-11-08 09:54:48,906 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 [2024-11-08 09:54:48,956 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 [2024-11-08 09:54:48,974 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 [2024-11-08 09:54:49,008 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 [2024-11-08 09:54:49,021 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 [2024-11-08 09:54:49,059 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 [2024-11-08 09:54:49,086 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:54:49,087 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 [2024-11-08 09:54:49,152 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:54:49,153 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 [2024-11-08 09:54:49,191 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:54:49,192 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 3 case distinctions, treesize of input 33 treesize of output 31 [2024-11-08 09:54:49,242 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:54:49,242 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 [2024-11-08 09:54:49,293 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:54:49,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 48 [2024-11-08 09:54:49,353 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:54:49,353 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 40 treesize of output 48 [2024-11-08 09:54:49,420 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:54:49,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 58 [2024-11-08 09:54:49,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:54:49,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:54:49,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:54:49,518 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:54:49,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 62 [2024-11-08 09:54:49,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:54:49,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:54:49,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:54:49,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:54:49,604 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-08 09:54:49,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 70 treesize of output 76 [2024-11-08 09:54:58,928 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 12 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:54:58,928 INFO L311 TraceCheckSpWp]: Computing backward predicates...