/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_copy7_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 18:10:16,647 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 18:10:16,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 18:10:16,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 18:10:16,685 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 18:10:16,687 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 18:10:16,688 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 18:10:16,708 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 18:10:16,711 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 18:10:16,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 18:10:16,720 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 18:10:16,722 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 18:10:16,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 18:10:16,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 18:10:16,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 18:10:16,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 18:10:16,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 18:10:16,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 18:10:16,738 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 18:10:16,741 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 18:10:16,743 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 18:10:16,745 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 18:10:16,746 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 18:10:16,747 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 18:10:16,752 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-15 18:10:16,756 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-15 18:10:16,758 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-15 18:10:16,759 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-15 18:10:16,760 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-15 18:10:16,761 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-15 18:10:16,761 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-15 18:10:16,762 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-15 18:10:16,763 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-15 18:10:16,763 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 18:10:16,764 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 18:10:16,765 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 18:10:16,766 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-15 18:10:16,798 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 18:10:16,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 18:10:16,799 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 18:10:16,799 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 18:10:16,800 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 18:10:16,801 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 18:10:16,802 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 18:10:16,802 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 18:10:16,802 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 18:10:16,803 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 18:10:16,803 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 18:10:16,803 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 18:10:16,803 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 18:10:16,804 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 18:10:16,804 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 18:10:16,804 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 18:10:16,804 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 18:10:16,805 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 18:10:16,805 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 18:10:16,805 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 18:10:16,805 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 18:10:16,806 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 18:10:16,806 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 18:10:16,806 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 18:10:16,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 18:10:16,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:10:16,807 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 18:10:16,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 18:10:16,807 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 18:10:16,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 18:10:16,808 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 18:10:17,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 18:10:17,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 18:10:17,225 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 18:10:17,227 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 18:10:17,228 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 18:10:17,230 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy7_ground-1.i [2022-10-15 18:10:17,329 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52d47d9d6/c1f73dea92984d95a2f5612e288762e0/FLAGa596893fd [2022-10-15 18:10:17,949 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 18:10:17,950 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy7_ground-1.i [2022-10-15 18:10:17,957 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52d47d9d6/c1f73dea92984d95a2f5612e288762e0/FLAGa596893fd [2022-10-15 18:10:18,316 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52d47d9d6/c1f73dea92984d95a2f5612e288762e0 [2022-10-15 18:10:18,323 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 18:10:18,331 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 18:10:18,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 18:10:18,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 18:10:18,338 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 18:10:18,339 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:10:18" (1/1) ... [2022-10-15 18:10:18,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46640e45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:18, skipping insertion in model container [2022-10-15 18:10:18,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:10:18" (1/1) ... [2022-10-15 18:10:18,349 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 18:10:18,369 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 18:10:18,536 WARN L230 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-examples/standard_copy7_ground-1.i[816,829] [2022-10-15 18:10:18,564 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:10:18,575 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 18:10:18,587 WARN L230 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-examples/standard_copy7_ground-1.i[816,829] [2022-10-15 18:10:18,602 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:10:18,625 INFO L208 MainTranslator]: Completed translation [2022-10-15 18:10:18,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:18 WrapperNode [2022-10-15 18:10:18,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 18:10:18,629 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 18:10:18,629 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 18:10:18,630 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 18:10:18,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:18" (1/1) ... [2022-10-15 18:10:18,647 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:18" (1/1) ... [2022-10-15 18:10:18,705 INFO L138 Inliner]: procedures = 16, calls = 49, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 163 [2022-10-15 18:10:18,705 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 18:10:18,708 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 18:10:18,708 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 18:10:18,708 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 18:10:18,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:18" (1/1) ... [2022-10-15 18:10:18,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:18" (1/1) ... [2022-10-15 18:10:18,737 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:18" (1/1) ... [2022-10-15 18:10:18,738 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:18" (1/1) ... [2022-10-15 18:10:18,755 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:18" (1/1) ... [2022-10-15 18:10:18,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:18" (1/1) ... [2022-10-15 18:10:18,770 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:18" (1/1) ... [2022-10-15 18:10:18,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:18" (1/1) ... [2022-10-15 18:10:18,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 18:10:18,784 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 18:10:18,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 18:10:18,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 18:10:18,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:18" (1/1) ... [2022-10-15 18:10:18,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:10:18,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:10:18,831 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-15 18:10:18,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-15 18:10:18,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 18:10:18,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 18:10:18,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 18:10:18,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 18:10:18,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 18:10:18,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 18:10:18,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 18:10:18,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 18:10:18,957 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 18:10:18,959 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 18:10:19,575 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 18:10:19,585 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 18:10:19,585 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-10-15 18:10:19,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:10:19 BoogieIcfgContainer [2022-10-15 18:10:19,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 18:10:19,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 18:10:19,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 18:10:19,596 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 18:10:19,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 06:10:18" (1/3) ... [2022-10-15 18:10:19,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62827f84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:10:19, skipping insertion in model container [2022-10-15 18:10:19,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:18" (2/3) ... [2022-10-15 18:10:19,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62827f84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:10:19, skipping insertion in model container [2022-10-15 18:10:19,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:10:19" (3/3) ... [2022-10-15 18:10:19,599 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy7_ground-1.i [2022-10-15 18:10:19,622 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 18:10:19,623 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2022-10-15 18:10:19,687 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 18:10:19,697 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@17014711, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 18:10:19,697 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2022-10-15 18:10:19,703 INFO L276 IsEmpty]: Start isEmpty. Operand has 101 states, 62 states have (on average 1.9193548387096775) internal successors, (119), 100 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:19,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:10:19,712 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:19,713 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:10:19,713 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-10-15 18:10:19,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:19,721 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-10-15 18:10:19,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:19,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510742653] [2022-10-15 18:10:19,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:19,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:21,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:21,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:21,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510742653] [2022-10-15 18:10:21,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510742653] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:10:21,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:10:21,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:10:21,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728822326] [2022-10-15 18:10:21,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:10:21,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:10:21,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:21,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:10:21,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:10:21,746 INFO L87 Difference]: Start difference. First operand has 101 states, 62 states have (on average 1.9193548387096775) internal successors, (119), 100 states have internal predecessors, (119), 0 states have call successors, (0), 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 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:21,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:21,915 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2022-10-15 18:10:21,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:10:21,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-10-15 18:10:21,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:21,934 INFO L225 Difference]: With dead ends: 98 [2022-10-15 18:10:21,934 INFO L226 Difference]: Without dead ends: 96 [2022-10-15 18:10:21,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:10:21,943 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 99 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:21,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 70 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:10:21,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-10-15 18:10:22,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-10-15 18:10:22,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 61 states have (on average 1.7049180327868851) internal successors, (104), 95 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:22,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2022-10-15 18:10:22,015 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 4 [2022-10-15 18:10:22,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:22,015 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2022-10-15 18:10:22,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:22,017 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2022-10-15 18:10:22,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:10:22,017 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:22,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:10:22,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 18:10:22,020 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-10-15 18:10:22,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:22,021 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-10-15 18:10:22,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:22,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951260322] [2022-10-15 18:10:22,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:22,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:22,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:22,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:22,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951260322] [2022-10-15 18:10:22,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951260322] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:10:22,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:10:22,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:10:22,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951642309] [2022-10-15 18:10:22,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:10:22,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:10:22,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:22,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:10:22,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:10:22,854 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:23,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:23,006 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2022-10-15 18:10:23,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:10:23,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-10-15 18:10:23,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:23,013 INFO L225 Difference]: With dead ends: 104 [2022-10-15 18:10:23,014 INFO L226 Difference]: Without dead ends: 104 [2022-10-15 18:10:23,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:10:23,021 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 6 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:23,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 161 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:10:23,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-10-15 18:10:23,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2022-10-15 18:10:23,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 63 states have (on average 1.6825396825396826) internal successors, (106), 97 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:23,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2022-10-15 18:10:23,048 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 4 [2022-10-15 18:10:23,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:23,050 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2022-10-15 18:10:23,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:23,051 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2022-10-15 18:10:23,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-15 18:10:23,052 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:23,052 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-15 18:10:23,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 18:10:23,053 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-10-15 18:10:23,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:23,056 INFO L85 PathProgramCache]: Analyzing trace with hash 889659654, now seen corresponding path program 1 times [2022-10-15 18:10:23,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:23,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882174943] [2022-10-15 18:10:23,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:23,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:23,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:23,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:23,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882174943] [2022-10-15 18:10:23,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882174943] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:10:23,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:10:23,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:10:23,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344517075] [2022-10-15 18:10:23,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:10:23,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:10:23,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:23,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:10:23,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:10:23,340 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:23,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:23,409 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2022-10-15 18:10:23,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:10:23,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-10-15 18:10:23,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:23,410 INFO L225 Difference]: With dead ends: 96 [2022-10-15 18:10:23,411 INFO L226 Difference]: Without dead ends: 96 [2022-10-15 18:10:23,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:10:23,413 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 95 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:23,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 68 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:10:23,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-10-15 18:10:23,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-10-15 18:10:23,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 63 states have (on average 1.6507936507936507) internal successors, (104), 95 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:23,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2022-10-15 18:10:23,422 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 6 [2022-10-15 18:10:23,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:23,422 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2022-10-15 18:10:23,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:23,423 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2022-10-15 18:10:23,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-15 18:10:23,423 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:23,423 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-15 18:10:23,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-15 18:10:23,424 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-10-15 18:10:23,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:23,425 INFO L85 PathProgramCache]: Analyzing trace with hash 889659655, now seen corresponding path program 1 times [2022-10-15 18:10:23,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:23,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169842459] [2022-10-15 18:10:23,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:23,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:23,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:23,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:23,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169842459] [2022-10-15 18:10:23,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169842459] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:10:23,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:10:23,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:10:23,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561975117] [2022-10-15 18:10:23,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:10:23,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:10:23,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:23,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:10:23,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:10:23,588 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:23,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:23,661 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2022-10-15 18:10:23,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:10:23,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-10-15 18:10:23,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:23,662 INFO L225 Difference]: With dead ends: 100 [2022-10-15 18:10:23,663 INFO L226 Difference]: Without dead ends: 100 [2022-10-15 18:10:23,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:10:23,665 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 2 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:23,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 158 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:10:23,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-10-15 18:10:23,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2022-10-15 18:10:23,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 65 states have (on average 1.6307692307692307) internal successors, (106), 97 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:23,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2022-10-15 18:10:23,673 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 6 [2022-10-15 18:10:23,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:23,673 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2022-10-15 18:10:23,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:23,673 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2022-10-15 18:10:23,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-15 18:10:23,674 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:23,674 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:10:23,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 18:10:23,675 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-10-15 18:10:23,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:23,676 INFO L85 PathProgramCache]: Analyzing trace with hash 719163786, now seen corresponding path program 1 times [2022-10-15 18:10:23,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:23,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825772766] [2022-10-15 18:10:23,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:23,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:24,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:24,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825772766] [2022-10-15 18:10:24,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825772766] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:10:24,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243321660] [2022-10-15 18:10:24,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:24,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:24,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:10:24,423 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) [2022-10-15 18:10:24,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-15 18:10:24,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:24,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 73 conjunts are in the unsatisfiable core [2022-10-15 18:10:24,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:10:24,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:24,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:24,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:24,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:24,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:24,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:24,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:24,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:24,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:24,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:24,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:24,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:24,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:24,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:24,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:24,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:24,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:24,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:24,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:24,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:24,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:24,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:24,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:24,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:24,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:24,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:24,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:24,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:24,898 INFO L244 Elim1Store]: Index analysis took 108 ms [2022-10-15 18:10:24,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 28 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 41 [2022-10-15 18:10:24,950 INFO L356 Elim1Store]: treesize reduction 168, result has 0.6 percent of original size [2022-10-15 18:10:24,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 148 treesize of output 134 [2022-10-15 18:10:25,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:25,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:10:25,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:25,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243321660] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:10:25,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:10:25,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-10-15 18:10:25,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683151676] [2022-10-15 18:10:25,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:10:25,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 18:10:25,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:25,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 18:10:25,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-10-15 18:10:25,431 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:25,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:25,936 INFO L93 Difference]: Finished difference Result 280 states and 306 transitions. [2022-10-15 18:10:25,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 18:10:25,937 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-15 18:10:25,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:25,939 INFO L225 Difference]: With dead ends: 280 [2022-10-15 18:10:25,939 INFO L226 Difference]: Without dead ends: 280 [2022-10-15 18:10:25,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-10-15 18:10:25,941 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 293 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:25,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 481 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-15 18:10:25,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-10-15 18:10:25,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 114. [2022-10-15 18:10:25,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 81 states have (on average 1.5555555555555556) internal successors, (126), 113 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:25,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2022-10-15 18:10:25,951 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 10 [2022-10-15 18:10:25,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:25,952 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2022-10-15 18:10:25,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:25,952 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2022-10-15 18:10:25,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-15 18:10:25,953 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:25,953 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 18:10:25,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-10-15 18:10:26,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:26,169 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-10-15 18:10:26,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:26,170 INFO L85 PathProgramCache]: Analyzing trace with hash -373337781, now seen corresponding path program 1 times [2022-10-15 18:10:26,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:26,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987146422] [2022-10-15 18:10:26,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:26,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:26,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:26,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987146422] [2022-10-15 18:10:26,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987146422] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:10:26,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86013766] [2022-10-15 18:10:26,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:26,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:26,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:10:26,606 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) [2022-10-15 18:10:26,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-15 18:10:26,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:26,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-15 18:10:26,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:10:26,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:27,048 INFO L356 Elim1Store]: treesize reduction 438, result has 21.2 percent of original size [2022-10-15 18:10:27,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 128 [2022-10-15 18:10:27,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13318 treesize of output 13302 [2022-10-15 18:10:28,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:28,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:10:28,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:28,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86013766] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:10:28,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:10:28,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-10-15 18:10:28,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387851939] [2022-10-15 18:10:28,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:10:28,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-15 18:10:28,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:28,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-15 18:10:28,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-15 18:10:28,496 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:28,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:28,809 INFO L93 Difference]: Finished difference Result 280 states and 306 transitions. [2022-10-15 18:10:28,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 18:10:28,809 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-10-15 18:10:28,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:28,811 INFO L225 Difference]: With dead ends: 280 [2022-10-15 18:10:28,811 INFO L226 Difference]: Without dead ends: 280 [2022-10-15 18:10:28,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-10-15 18:10:28,813 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 280 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:28,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 362 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 18:10:28,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-10-15 18:10:28,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 116. [2022-10-15 18:10:28,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 83 states have (on average 1.5180722891566265) internal successors, (126), 115 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:28,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2022-10-15 18:10:28,821 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 12 [2022-10-15 18:10:28,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:28,821 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2022-10-15 18:10:28,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:28,822 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2022-10-15 18:10:28,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-15 18:10:28,822 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:28,823 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 18:10:28,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-15 18:10:29,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-15 18:10:29,038 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-10-15 18:10:29,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:29,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1824164062, now seen corresponding path program 1 times [2022-10-15 18:10:29,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:29,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304720886] [2022-10-15 18:10:29,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:29,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:29,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:29,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 18:10:29,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:29,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304720886] [2022-10-15 18:10:29,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304720886] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:10:29,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390941979] [2022-10-15 18:10:29,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:29,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:29,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:10:29,184 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) [2022-10-15 18:10:29,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-15 18:10:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:29,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-15 18:10:29,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:10:29,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:29,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:10:29,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:29,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390941979] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:10:29,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:10:29,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-10-15 18:10:29,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477718439] [2022-10-15 18:10:29,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:10:29,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-15 18:10:29,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:29,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-15 18:10:29,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-10-15 18:10:29,421 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:29,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:29,797 INFO L93 Difference]: Finished difference Result 187 states and 195 transitions. [2022-10-15 18:10:29,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-15 18:10:29,798 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-10-15 18:10:29,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:29,799 INFO L225 Difference]: With dead ends: 187 [2022-10-15 18:10:29,799 INFO L226 Difference]: Without dead ends: 187 [2022-10-15 18:10:29,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-10-15 18:10:29,801 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 177 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:29,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 230 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 18:10:29,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-10-15 18:10:29,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 133. [2022-10-15 18:10:29,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 100 states have (on average 1.43) internal successors, (143), 132 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:29,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2022-10-15 18:10:29,808 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 18 [2022-10-15 18:10:29,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:29,808 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2022-10-15 18:10:29,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:29,809 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2022-10-15 18:10:29,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-15 18:10:29,810 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:29,810 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1] [2022-10-15 18:10:29,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-15 18:10:30,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:30,025 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-10-15 18:10:30,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:30,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1808870570, now seen corresponding path program 2 times [2022-10-15 18:10:30,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:30,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110820467] [2022-10-15 18:10:30,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:30,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:31,423 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:31,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:31,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110820467] [2022-10-15 18:10:31,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110820467] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:10:31,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484971062] [2022-10-15 18:10:31,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:10:31,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:31,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:10:31,426 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) [2022-10-15 18:10:31,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-15 18:10:31,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:10:31,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:10:31,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 49 conjunts are in the unsatisfiable core [2022-10-15 18:10:31,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:10:31,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:31,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:31,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:31,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:31,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:31,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:31,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:31,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:31,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:31,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:31,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:31,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:31,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:31,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:31,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:31,845 INFO L356 Elim1Store]: treesize reduction 160, result has 33.9 percent of original size [2022-10-15 18:10:31,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 15 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 27 treesize of output 87 [2022-10-15 18:10:31,916 INFO L356 Elim1Store]: treesize reduction 41, result has 16.3 percent of original size [2022-10-15 18:10:31,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1446 treesize of output 1384 [2022-10-15 18:10:32,745 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:32,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:10:32,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484971062] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:10:32,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:10:32,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2022-10-15 18:10:32,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320542149] [2022-10-15 18:10:32,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:10:32,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 18:10:32,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:32,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 18:10:32,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-10-15 18:10:32,748 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:32,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:32,873 INFO L93 Difference]: Finished difference Result 132 states and 141 transitions. [2022-10-15 18:10:32,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 18:10:32,874 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-10-15 18:10:32,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:32,875 INFO L225 Difference]: With dead ends: 132 [2022-10-15 18:10:32,875 INFO L226 Difference]: Without dead ends: 132 [2022-10-15 18:10:32,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-10-15 18:10:32,876 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 278 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:32,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 142 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:10:32,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-10-15 18:10:32,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-10-15 18:10:32,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 100 states have (on average 1.41) internal successors, (141), 131 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) [2022-10-15 18:10:32,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 141 transitions. [2022-10-15 18:10:32,882 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 141 transitions. Word has length 28 [2022-10-15 18:10:32,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:32,882 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 141 transitions. [2022-10-15 18:10:32,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:32,883 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 141 transitions. [2022-10-15 18:10:32,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-10-15 18:10:32,883 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:32,884 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1] [2022-10-15 18:10:32,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-15 18:10:33,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:33,099 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-10-15 18:10:33,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:33,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1137135639, now seen corresponding path program 2 times [2022-10-15 18:10:33,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:33,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995841457] [2022-10-15 18:10:33,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:33,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:33,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:33,398 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:33,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:33,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995841457] [2022-10-15 18:10:33,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995841457] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:10:33,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912720066] [2022-10-15 18:10:33,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:10:33,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:33,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:10:33,403 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) [2022-10-15 18:10:33,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-15 18:10:33,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 18:10:33,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:10:33,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-15 18:10:33,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:10:33,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:33,761 INFO L356 Elim1Store]: treesize reduction 438, result has 21.2 percent of original size [2022-10-15 18:10:33,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 128 [2022-10-15 18:10:33,966 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 109182966 treesize of output 109051894