/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/termination-dietlibc/strtoul.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-16 04:35:48,528 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-16 04:35:48,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-16 04:35:48,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-16 04:35:48,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-16 04:35:48,599 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-16 04:35:48,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-16 04:35:48,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-16 04:35:48,628 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-16 04:35:48,629 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-16 04:35:48,631 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-16 04:35:48,633 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-16 04:35:48,633 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-16 04:35:48,635 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-16 04:35:48,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-16 04:35:48,638 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-16 04:35:48,639 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-16 04:35:48,640 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-16 04:35:48,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-16 04:35:48,645 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-16 04:35:48,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-16 04:35:48,649 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-16 04:35:48,650 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-16 04:35:48,651 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-16 04:35:48,656 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-16 04:35:48,661 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-16 04:35:48,662 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-16 04:35:48,663 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-16 04:35:48,664 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-16 04:35:48,666 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-16 04:35:48,666 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-16 04:35:48,667 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-16 04:35:48,668 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-16 04:35:48,668 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-16 04:35:48,669 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-16 04:35:48,670 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-16 04:35:48,671 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 [2022-10-16 04:35:48,700 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-16 04:35:48,701 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-16 04:35:48,701 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-16 04:35:48,702 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-16 04:35:48,703 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-16 04:35:48,703 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-16 04:35:48,704 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-16 04:35:48,704 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-16 04:35:48,704 INFO L138 SettingsManager]: * Use SBE=true [2022-10-16 04:35:48,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-16 04:35:48,705 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-16 04:35:48,705 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-16 04:35:48,706 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-16 04:35:48,706 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-16 04:35:48,706 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-16 04:35:48,706 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-16 04:35:48,707 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-16 04:35:48,707 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-16 04:35:48,707 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-16 04:35:48,707 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-16 04:35:48,708 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-16 04:35:48,708 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-16 04:35:48,708 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-16 04:35:48,709 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-16 04:35:48,709 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-16 04:35:48,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 04:35:48,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-16 04:35:48,710 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-16 04:35:48,710 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-16 04:35:48,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-16 04:35:48,711 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-16 04:35:49,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-16 04:35:49,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-16 04:35:49,133 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-16 04:35:49,135 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-16 04:35:49,136 INFO L275 PluginConnector]: CDTParser initialized [2022-10-16 04:35:49,138 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-dietlibc/strtoul.i [2022-10-16 04:35:49,217 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cae555309/b211f26d01aa431cb3d288f77c2c0884/FLAG919c1989b [2022-10-16 04:35:49,955 INFO L306 CDTParser]: Found 1 translation units. [2022-10-16 04:35:49,956 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-dietlibc/strtoul.i [2022-10-16 04:35:49,985 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cae555309/b211f26d01aa431cb3d288f77c2c0884/FLAG919c1989b [2022-10-16 04:35:50,247 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cae555309/b211f26d01aa431cb3d288f77c2c0884 [2022-10-16 04:35:50,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-16 04:35:50,257 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-16 04:35:50,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-16 04:35:50,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-16 04:35:50,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-16 04:35:50,268 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 04:35:50" (1/1) ... [2022-10-16 04:35:50,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a3741b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:35:50, skipping insertion in model container [2022-10-16 04:35:50,270 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 04:35:50" (1/1) ... [2022-10-16 04:35:50,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-16 04:35:50,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-16 04:35:50,732 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 04:35:50,743 INFO L203 MainTranslator]: Completed pre-run [2022-10-16 04:35:50,793 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 04:35:50,825 INFO L208 MainTranslator]: Completed translation [2022-10-16 04:35:50,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:35:50 WrapperNode [2022-10-16 04:35:50,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-16 04:35:50,827 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-16 04:35:50,828 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-16 04:35:50,828 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-16 04:35:50,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:35:50" (1/1) ... [2022-10-16 04:35:50,889 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:35:50" (1/1) ... [2022-10-16 04:35:50,925 INFO L138 Inliner]: procedures = 116, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 153 [2022-10-16 04:35:50,926 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-16 04:35:50,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-16 04:35:50,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-16 04:35:50,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-16 04:35:50,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:35:50" (1/1) ... [2022-10-16 04:35:50,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:35:50" (1/1) ... [2022-10-16 04:35:50,942 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:35:50" (1/1) ... [2022-10-16 04:35:50,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:35:50" (1/1) ... [2022-10-16 04:35:50,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:35:50" (1/1) ... [2022-10-16 04:35:50,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:35:50" (1/1) ... [2022-10-16 04:35:50,960 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:35:50" (1/1) ... [2022-10-16 04:35:50,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:35:50" (1/1) ... [2022-10-16 04:35:50,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-16 04:35:50,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-16 04:35:50,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-16 04:35:50,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-16 04:35:50,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:35:50" (1/1) ... [2022-10-16 04:35:50,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 04:35:50,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:35:51,011 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) [2022-10-16 04:35:51,015 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 [2022-10-16 04:35:51,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-16 04:35:51,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-16 04:35:51,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-16 04:35:51,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-16 04:35:51,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-16 04:35:51,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-16 04:35:51,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-16 04:35:51,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-16 04:35:51,198 INFO L235 CfgBuilder]: Building ICFG [2022-10-16 04:35:51,200 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-16 04:35:51,748 INFO L276 CfgBuilder]: Performing block encoding [2022-10-16 04:35:51,757 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-16 04:35:51,758 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-16 04:35:51,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 04:35:51 BoogieIcfgContainer [2022-10-16 04:35:51,761 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-16 04:35:51,763 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-16 04:35:51,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-16 04:35:51,768 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-16 04:35:51,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 04:35:50" (1/3) ... [2022-10-16 04:35:51,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7886927 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 04:35:51, skipping insertion in model container [2022-10-16 04:35:51,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:35:50" (2/3) ... [2022-10-16 04:35:51,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7886927 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 04:35:51, skipping insertion in model container [2022-10-16 04:35:51,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 04:35:51" (3/3) ... [2022-10-16 04:35:51,772 INFO L112 eAbstractionObserver]: Analyzing ICFG strtoul.i [2022-10-16 04:35:51,799 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-16 04:35:51,800 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2022-10-16 04:35:51,867 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-16 04:35:51,878 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;@219ca4c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-16 04:35:51,878 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2022-10-16 04:35:51,885 INFO L276 IsEmpty]: Start isEmpty. Operand has 75 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 74 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:51,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 04:35:51,894 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:35:51,895 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 04:35:51,896 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:35:51,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:35:51,904 INFO L85 PathProgramCache]: Analyzing trace with hash 925784, now seen corresponding path program 1 times [2022-10-16 04:35:51,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:35:51,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742777261] [2022-10-16 04:35:51,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:35:51,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:35:52,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:35:52,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:35:52,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:35:52,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742777261] [2022-10-16 04:35:52,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742777261] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:35:52,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:35:52,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 04:35:52,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485012169] [2022-10-16 04:35:52,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:35:52,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 04:35:52,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:35:52,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 04:35:52,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 04:35:52,183 INFO L87 Difference]: Start difference. First operand has 75 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 74 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2022-10-16 04:35:52,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:35:52,275 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2022-10-16 04:35:52,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 04:35:52,278 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 [2022-10-16 04:35:52,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:35:52,291 INFO L225 Difference]: With dead ends: 76 [2022-10-16 04:35:52,291 INFO L226 Difference]: Without dead ends: 73 [2022-10-16 04:35:52,293 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 [2022-10-16 04:35:52,298 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 2 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:35:52,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 153 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 04:35:52,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-10-16 04:35:52,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-10-16 04:35:52,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 72 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:52,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 91 transitions. [2022-10-16 04:35:52,350 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 91 transitions. Word has length 4 [2022-10-16 04:35:52,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:35:52,350 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 91 transitions. [2022-10-16 04:35:52,350 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) [2022-10-16 04:35:52,351 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 91 transitions. [2022-10-16 04:35:52,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-16 04:35:52,351 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:35:52,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-16 04:35:52,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-16 04:35:52,352 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:35:52,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:35:52,353 INFO L85 PathProgramCache]: Analyzing trace with hash 28695889, now seen corresponding path program 1 times [2022-10-16 04:35:52,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:35:52,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507390913] [2022-10-16 04:35:52,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:35:52,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:35:52,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:35:52,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:35:52,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:35:52,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507390913] [2022-10-16 04:35:52,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507390913] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:35:52,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:35:52,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 04:35:52,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924991330] [2022-10-16 04:35:52,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:35:52,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 04:35:52,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:35:52,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 04:35:52,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 04:35:52,487 INFO L87 Difference]: Start difference. First operand 73 states and 91 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:52,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:35:52,543 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2022-10-16 04:35:52,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 04:35:52,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-10-16 04:35:52,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:35:52,546 INFO L225 Difference]: With dead ends: 71 [2022-10-16 04:35:52,546 INFO L226 Difference]: Without dead ends: 71 [2022-10-16 04:35:52,546 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 [2022-10-16 04:35:52,548 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 82 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:35:52,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 63 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:35:52,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-10-16 04:35:52,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-10-16 04:35:52,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 70 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:52,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 89 transitions. [2022-10-16 04:35:52,562 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 89 transitions. Word has length 5 [2022-10-16 04:35:52,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:35:52,563 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 89 transitions. [2022-10-16 04:35:52,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:52,563 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 89 transitions. [2022-10-16 04:35:52,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-16 04:35:52,564 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:35:52,564 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-16 04:35:52,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-16 04:35:52,565 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:35:52,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:35:52,565 INFO L85 PathProgramCache]: Analyzing trace with hash 28695890, now seen corresponding path program 1 times [2022-10-16 04:35:52,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:35:52,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93016130] [2022-10-16 04:35:52,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:35:52,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:35:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:35:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:35:52,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:35:52,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93016130] [2022-10-16 04:35:52,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93016130] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:35:52,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:35:52,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 04:35:52,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301817508] [2022-10-16 04:35:52,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:35:52,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 04:35:52,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:35:52,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 04:35:52,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 04:35:52,747 INFO L87 Difference]: Start difference. First operand 71 states and 89 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:52,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:35:52,807 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2022-10-16 04:35:52,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 04:35:52,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-10-16 04:35:52,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:35:52,809 INFO L225 Difference]: With dead ends: 70 [2022-10-16 04:35:52,809 INFO L226 Difference]: Without dead ends: 70 [2022-10-16 04:35:52,810 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 [2022-10-16 04:35:52,812 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 6 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:35:52,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 140 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 04:35:52,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-10-16 04:35:52,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-10-16 04:35:52,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 69 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:52,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2022-10-16 04:35:52,821 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 5 [2022-10-16 04:35:52,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:35:52,822 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2022-10-16 04:35:52,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:52,822 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2022-10-16 04:35:52,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-16 04:35:52,823 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:35:52,823 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-16 04:35:52,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-16 04:35:52,824 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:35:52,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:35:52,824 INFO L85 PathProgramCache]: Analyzing trace with hash 28695943, now seen corresponding path program 1 times [2022-10-16 04:35:52,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:35:52,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323663132] [2022-10-16 04:35:52,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:35:52,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:35:52,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:35:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:35:53,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:35:53,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323663132] [2022-10-16 04:35:53,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323663132] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:35:53,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:35:53,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-16 04:35:53,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693910401] [2022-10-16 04:35:53,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:35:53,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 04:35:53,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:35:53,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 04:35:53,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 04:35:53,056 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:53,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:35:53,168 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2022-10-16 04:35:53,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 04:35:53,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-10-16 04:35:53,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:35:53,170 INFO L225 Difference]: With dead ends: 76 [2022-10-16 04:35:53,170 INFO L226 Difference]: Without dead ends: 76 [2022-10-16 04:35:53,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-16 04:35:53,173 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 7 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:35:53,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 200 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 04:35:53,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-10-16 04:35:53,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2022-10-16 04:35:53,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 50 states have (on average 1.82) internal successors, (91), 71 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:53,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 91 transitions. [2022-10-16 04:35:53,183 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 91 transitions. Word has length 5 [2022-10-16 04:35:53,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:35:53,183 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 91 transitions. [2022-10-16 04:35:53,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:53,184 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 91 transitions. [2022-10-16 04:35:53,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-16 04:35:53,185 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:35:53,185 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:35:53,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-16 04:35:53,185 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:35:53,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:35:53,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1806945494, now seen corresponding path program 1 times [2022-10-16 04:35:53,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:35:53,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246839848] [2022-10-16 04:35:53,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:35:53,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:35:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:35:53,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:35:53,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:35:53,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246839848] [2022-10-16 04:35:53,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246839848] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:35:53,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:35:53,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-16 04:35:53,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87066829] [2022-10-16 04:35:53,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:35:53,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 04:35:53,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:35:53,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 04:35:53,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 04:35:53,450 INFO L87 Difference]: Start difference. First operand 72 states and 91 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:53,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:35:53,558 INFO L93 Difference]: Finished difference Result 70 states and 91 transitions. [2022-10-16 04:35:53,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 04:35:53,560 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-16 04:35:53,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:35:53,563 INFO L225 Difference]: With dead ends: 70 [2022-10-16 04:35:53,563 INFO L226 Difference]: Without dead ends: 70 [2022-10-16 04:35:53,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-16 04:35:53,570 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 125 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:35:53,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 62 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 04:35:53,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-10-16 04:35:53,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2022-10-16 04:35:53,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 50 states have (on average 1.64) internal successors, (82), 62 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:53,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2022-10-16 04:35:53,590 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 7 [2022-10-16 04:35:53,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:35:53,590 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2022-10-16 04:35:53,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:53,593 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2022-10-16 04:35:53,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-16 04:35:53,593 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:35:53,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:35:53,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-16 04:35:53,594 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:35:53,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:35:53,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1806945495, now seen corresponding path program 1 times [2022-10-16 04:35:53,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:35:53,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781273273] [2022-10-16 04:35:53,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:35:53,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:35:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:35:53,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:35:53,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:35:53,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781273273] [2022-10-16 04:35:53,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781273273] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:35:53,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:35:53,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 04:35:53,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513405099] [2022-10-16 04:35:53,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:35:53,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 04:35:53,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:35:53,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 04:35:53,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-16 04:35:53,799 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:54,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:35:54,023 INFO L93 Difference]: Finished difference Result 107 states and 143 transitions. [2022-10-16 04:35:54,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 04:35:54,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-16 04:35:54,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:35:54,029 INFO L225 Difference]: With dead ends: 107 [2022-10-16 04:35:54,029 INFO L226 Difference]: Without dead ends: 107 [2022-10-16 04:35:54,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-10-16 04:35:54,037 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 211 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 04:35:54,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 126 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 04:35:54,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-10-16 04:35:54,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 87. [2022-10-16 04:35:54,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 74 states have (on average 1.6081081081081081) internal successors, (119), 86 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) [2022-10-16 04:35:54,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 119 transitions. [2022-10-16 04:35:54,058 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 119 transitions. Word has length 7 [2022-10-16 04:35:54,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:35:54,058 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 119 transitions. [2022-10-16 04:35:54,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:54,060 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 119 transitions. [2022-10-16 04:35:54,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-16 04:35:54,061 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:35:54,062 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:35:54,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-16 04:35:54,062 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:35:54,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:35:54,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1307832464, now seen corresponding path program 1 times [2022-10-16 04:35:54,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:35:54,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955359542] [2022-10-16 04:35:54,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:35:54,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:35:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:35:54,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:35:54,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:35:54,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955359542] [2022-10-16 04:35:54,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955359542] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:35:54,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:35:54,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-16 04:35:54,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645117803] [2022-10-16 04:35:54,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:35:54,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 04:35:54,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:35:54,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 04:35:54,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-16 04:35:54,424 INFO L87 Difference]: Start difference. First operand 87 states and 119 transitions. Second operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:54,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:35:54,699 INFO L93 Difference]: Finished difference Result 182 states and 244 transitions. [2022-10-16 04:35:54,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 04:35:54,700 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-10-16 04:35:54,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:35:54,702 INFO L225 Difference]: With dead ends: 182 [2022-10-16 04:35:54,702 INFO L226 Difference]: Without dead ends: 182 [2022-10-16 04:35:54,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-10-16 04:35:54,704 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 252 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 04:35:54,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 443 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 04:35:54,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-10-16 04:35:54,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 91. [2022-10-16 04:35:54,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 78 states have (on average 1.5769230769230769) internal successors, (123), 90 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:54,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 123 transitions. [2022-10-16 04:35:54,711 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 123 transitions. Word has length 9 [2022-10-16 04:35:54,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:35:54,712 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 123 transitions. [2022-10-16 04:35:54,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:54,712 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 123 transitions. [2022-10-16 04:35:54,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-16 04:35:54,713 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:35:54,713 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:35:54,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-16 04:35:54,714 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:35:54,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:35:54,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1356498634, now seen corresponding path program 1 times [2022-10-16 04:35:54,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:35:54,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220064080] [2022-10-16 04:35:54,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:35:54,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:35:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:35:54,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:35:54,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:35:54,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220064080] [2022-10-16 04:35:54,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220064080] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:35:54,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829168720] [2022-10-16 04:35:54,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:35:54,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:35:54,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:35:54,846 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) [2022-10-16 04:35:54,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-16 04:35:54,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:35:54,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-16 04:35:54,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:35:55,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 04:35:55,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:35:55,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:35:55,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:35:55,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829168720] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:35:55,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:35:55,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-10-16 04:35:55,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471254788] [2022-10-16 04:35:55,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:35:55,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-16 04:35:55,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:35:55,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-16 04:35:55,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-10-16 04:35:55,384 INFO L87 Difference]: Start difference. First operand 91 states and 123 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:55,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:35:55,655 INFO L93 Difference]: Finished difference Result 159 states and 218 transitions. [2022-10-16 04:35:55,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 04:35:55,656 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-10-16 04:35:55,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:35:55,657 INFO L225 Difference]: With dead ends: 159 [2022-10-16 04:35:55,657 INFO L226 Difference]: Without dead ends: 159 [2022-10-16 04:35:55,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-10-16 04:35:55,658 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 157 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 04:35:55,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 251 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 04:35:55,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-10-16 04:35:55,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 89. [2022-10-16 04:35:55,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 77 states have (on average 1.5714285714285714) internal successors, (121), 88 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:55,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 121 transitions. [2022-10-16 04:35:55,664 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 121 transitions. Word has length 9 [2022-10-16 04:35:55,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:35:55,664 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 121 transitions. [2022-10-16 04:35:55,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:55,665 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 121 transitions. [2022-10-16 04:35:55,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-16 04:35:55,665 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:35:55,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:35:55,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-16 04:35:55,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:35:55,867 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:35:55,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:35:55,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1469414922, now seen corresponding path program 1 times [2022-10-16 04:35:55,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:35:55,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099436564] [2022-10-16 04:35:55,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:35:55,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:35:55,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:35:56,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:35:56,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:35:56,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099436564] [2022-10-16 04:35:56,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099436564] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:35:56,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:35:56,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-16 04:35:56,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357293135] [2022-10-16 04:35:56,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:35:56,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 04:35:56,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:35:56,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 04:35:56,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-16 04:35:56,148 INFO L87 Difference]: Start difference. First operand 89 states and 121 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:56,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:35:56,325 INFO L93 Difference]: Finished difference Result 181 states and 242 transitions. [2022-10-16 04:35:56,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 04:35:56,326 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-10-16 04:35:56,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:35:56,327 INFO L225 Difference]: With dead ends: 181 [2022-10-16 04:35:56,328 INFO L226 Difference]: Without dead ends: 181 [2022-10-16 04:35:56,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-10-16 04:35:56,329 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 183 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:35:56,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 442 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 04:35:56,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-10-16 04:35:56,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 91. [2022-10-16 04:35:56,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 79 states have (on average 1.5569620253164558) internal successors, (123), 90 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:56,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 123 transitions. [2022-10-16 04:35:56,334 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 123 transitions. Word has length 13 [2022-10-16 04:35:56,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:35:56,335 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 123 transitions. [2022-10-16 04:35:56,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:56,335 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 123 transitions. [2022-10-16 04:35:56,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-16 04:35:56,336 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:35:56,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:35:56,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-16 04:35:56,337 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:35:56,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:35:56,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1135853485, now seen corresponding path program 1 times [2022-10-16 04:35:56,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:35:56,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275801843] [2022-10-16 04:35:56,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:35:56,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:35:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:35:56,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:35:56,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:35:56,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275801843] [2022-10-16 04:35:56,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275801843] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:35:56,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605788801] [2022-10-16 04:35:56,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:35:56,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:35:56,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:35:56,687 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) [2022-10-16 04:35:56,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-16 04:35:56,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:35:56,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2022-10-16 04:35:56,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:35:56,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:35:56,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-16 04:35:56,934 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-16 04:35:56,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-16 04:35:56,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:35:56,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:35:57,157 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 27 treesize of output 23 [2022-10-16 04:35:57,242 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:35:57,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-10-16 04:35:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:35:57,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605788801] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:35:57,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:35:57,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2022-10-16 04:35:57,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617463044] [2022-10-16 04:35:57,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:35:57,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-10-16 04:35:57,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:35:57,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-10-16 04:35:57,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-10-16 04:35:57,264 INFO L87 Difference]: Start difference. First operand 91 states and 123 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:58,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:35:58,573 INFO L93 Difference]: Finished difference Result 347 states and 466 transitions. [2022-10-16 04:35:58,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-10-16 04:35:58,574 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-10-16 04:35:58,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:35:58,576 INFO L225 Difference]: With dead ends: 347 [2022-10-16 04:35:58,576 INFO L226 Difference]: Without dead ends: 347 [2022-10-16 04:35:58,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=312, Invalid=1094, Unknown=0, NotChecked=0, Total=1406 [2022-10-16 04:35:58,578 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 812 mSDsluCounter, 1384 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-16 04:35:58,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [812 Valid, 1580 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 895 Invalid, 0 Unknown, 158 Unchecked, 0.8s Time] [2022-10-16 04:35:58,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-10-16 04:35:58,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 106. [2022-10-16 04:35:58,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 98 states have (on average 1.489795918367347) internal successors, (146), 105 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:58,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 146 transitions. [2022-10-16 04:35:58,585 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 146 transitions. Word has length 13 [2022-10-16 04:35:58,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:35:58,585 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 146 transitions. [2022-10-16 04:35:58,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:58,586 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 146 transitions. [2022-10-16 04:35:58,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-16 04:35:58,586 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:35:58,586 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:35:58,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-16 04:35:58,802 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,SelfDestructingSolverStorable9 [2022-10-16 04:35:58,802 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:35:58,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:35:58,803 INFO L85 PathProgramCache]: Analyzing trace with hash -887765981, now seen corresponding path program 1 times [2022-10-16 04:35:58,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:35:58,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906573963] [2022-10-16 04:35:58,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:35:58,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:35:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:35:59,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:35:59,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:35:59,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906573963] [2022-10-16 04:35:59,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906573963] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:35:59,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:35:59,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-16 04:35:59,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051613599] [2022-10-16 04:35:59,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:35:59,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 04:35:59,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:35:59,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 04:35:59,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-16 04:35:59,030 INFO L87 Difference]: Start difference. First operand 106 states and 146 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:59,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:35:59,180 INFO L93 Difference]: Finished difference Result 187 states and 253 transitions. [2022-10-16 04:35:59,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 04:35:59,181 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-10-16 04:35:59,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:35:59,182 INFO L225 Difference]: With dead ends: 187 [2022-10-16 04:35:59,183 INFO L226 Difference]: Without dead ends: 187 [2022-10-16 04:35:59,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-10-16 04:35:59,184 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 286 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:35:59,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 287 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 04:35:59,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-10-16 04:35:59,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 108. [2022-10-16 04:35:59,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 100 states have (on average 1.48) internal successors, (148), 107 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:59,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 148 transitions. [2022-10-16 04:35:59,189 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 148 transitions. Word has length 15 [2022-10-16 04:35:59,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:35:59,189 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 148 transitions. [2022-10-16 04:35:59,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:35:59,190 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 148 transitions. [2022-10-16 04:35:59,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-16 04:35:59,190 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:35:59,190 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:35:59,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-16 04:35:59,191 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:35:59,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:35:59,192 INFO L85 PathProgramCache]: Analyzing trace with hash -633506548, now seen corresponding path program 2 times [2022-10-16 04:35:59,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:35:59,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861096298] [2022-10-16 04:35:59,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:35:59,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:35:59,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:35:59,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:35:59,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:35:59,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861096298] [2022-10-16 04:35:59,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861096298] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:35:59,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76821659] [2022-10-16 04:35:59,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 04:35:59,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:35:59,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:35:59,526 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) [2022-10-16 04:35:59,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-16 04:35:59,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 04:35:59,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:35:59,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 26 conjunts are in the unsatisfiable core [2022-10-16 04:35:59,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:35:59,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:35:59,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:35:59,905 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:35:59,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:35:59,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:35:59,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:36:00,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:36:00,069 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 28 treesize of output 24 [2022-10-16 04:36:00,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:00,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76821659] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:36:00,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:36:00,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2022-10-16 04:36:00,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512879743] [2022-10-16 04:36:00,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:36:00,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-10-16 04:36:00,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:00,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-10-16 04:36:00,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-10-16 04:36:00,306 INFO L87 Difference]: Start difference. First operand 108 states and 148 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:00,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:00,903 INFO L93 Difference]: Finished difference Result 331 states and 455 transitions. [2022-10-16 04:36:00,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-16 04:36:00,904 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-10-16 04:36:00,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:00,906 INFO L225 Difference]: With dead ends: 331 [2022-10-16 04:36:00,906 INFO L226 Difference]: Without dead ends: 331 [2022-10-16 04:36:00,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2022-10-16 04:36:00,908 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 1065 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1065 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:00,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1065 Valid, 1143 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 378 Invalid, 0 Unknown, 38 Unchecked, 0.3s Time] [2022-10-16 04:36:00,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-10-16 04:36:00,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 118. [2022-10-16 04:36:00,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 110 states have (on average 1.4545454545454546) internal successors, (160), 117 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:00,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 160 transitions. [2022-10-16 04:36:00,914 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 160 transitions. Word has length 15 [2022-10-16 04:36:00,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:00,914 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 160 transitions. [2022-10-16 04:36:00,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:00,915 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 160 transitions. [2022-10-16 04:36:00,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-16 04:36:00,916 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:00,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:00,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-16 04:36:01,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:01,129 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:01,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:01,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1749088514, now seen corresponding path program 1 times [2022-10-16 04:36:01,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:01,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21692433] [2022-10-16 04:36:01,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:01,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:01,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:01,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:01,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:01,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21692433] [2022-10-16 04:36:01,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21692433] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:36:01,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:36:01,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-16 04:36:01,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119320434] [2022-10-16 04:36:01,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:36:01,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 04:36:01,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:01,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 04:36:01,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 04:36:01,162 INFO L87 Difference]: Start difference. First operand 118 states and 160 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:01,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:01,172 INFO L93 Difference]: Finished difference Result 113 states and 150 transitions. [2022-10-16 04:36:01,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 04:36:01,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-10-16 04:36:01,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:01,173 INFO L225 Difference]: With dead ends: 113 [2022-10-16 04:36:01,173 INFO L226 Difference]: Without dead ends: 113 [2022-10-16 04:36:01,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 04:36:01,174 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:01,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 140 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:36:01,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-10-16 04:36:01,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-10-16 04:36:01,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 105 states have (on average 1.4285714285714286) internal successors, (150), 112 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:01,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 150 transitions. [2022-10-16 04:36:01,179 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 150 transitions. Word has length 16 [2022-10-16 04:36:01,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:01,179 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 150 transitions. [2022-10-16 04:36:01,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:01,180 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 150 transitions. [2022-10-16 04:36:01,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-16 04:36:01,180 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:01,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:01,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-10-16 04:36:01,181 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:01,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:01,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1547682981, now seen corresponding path program 1 times [2022-10-16 04:36:01,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:01,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453347751] [2022-10-16 04:36:01,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:01,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:01,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:01,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:01,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453347751] [2022-10-16 04:36:01,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453347751] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:36:01,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:36:01,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-16 04:36:01,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939604681] [2022-10-16 04:36:01,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:36:01,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 04:36:01,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:01,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 04:36:01,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-10-16 04:36:01,402 INFO L87 Difference]: Start difference. First operand 113 states and 150 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:01,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:01,636 INFO L93 Difference]: Finished difference Result 190 states and 252 transitions. [2022-10-16 04:36:01,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-16 04:36:01,637 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-10-16 04:36:01,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:01,639 INFO L225 Difference]: With dead ends: 190 [2022-10-16 04:36:01,639 INFO L226 Difference]: Without dead ends: 190 [2022-10-16 04:36:01,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-10-16 04:36:01,640 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 279 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:01,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 416 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 04:36:01,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-10-16 04:36:01,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 117. [2022-10-16 04:36:01,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 109 states have (on average 1.4220183486238531) internal successors, (155), 116 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:01,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 155 transitions. [2022-10-16 04:36:01,645 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 155 transitions. Word has length 18 [2022-10-16 04:36:01,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:01,645 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 155 transitions. [2022-10-16 04:36:01,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:01,646 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 155 transitions. [2022-10-16 04:36:01,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-16 04:36:01,647 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:01,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:01,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-10-16 04:36:01,647 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:01,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:01,648 INFO L85 PathProgramCache]: Analyzing trace with hash -551049815, now seen corresponding path program 1 times [2022-10-16 04:36:01,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:01,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254489920] [2022-10-16 04:36:01,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:01,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:01,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:01,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:01,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254489920] [2022-10-16 04:36:01,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254489920] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:36:01,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:36:01,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-16 04:36:01,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972920914] [2022-10-16 04:36:01,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:36:01,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 04:36:01,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:01,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 04:36:01,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-16 04:36:01,882 INFO L87 Difference]: Start difference. First operand 117 states and 155 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:02,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:02,036 INFO L93 Difference]: Finished difference Result 170 states and 224 transitions. [2022-10-16 04:36:02,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 04:36:02,037 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-10-16 04:36:02,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:02,038 INFO L225 Difference]: With dead ends: 170 [2022-10-16 04:36:02,039 INFO L226 Difference]: Without dead ends: 170 [2022-10-16 04:36:02,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-10-16 04:36:02,040 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 170 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:02,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 375 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 04:36:02,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-10-16 04:36:02,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 121. [2022-10-16 04:36:02,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 113 states have (on average 1.415929203539823) internal successors, (160), 120 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:02,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 160 transitions. [2022-10-16 04:36:02,045 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 160 transitions. Word has length 19 [2022-10-16 04:36:02,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:02,045 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 160 transitions. [2022-10-16 04:36:02,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:02,045 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 160 transitions. [2022-10-16 04:36:02,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-16 04:36:02,046 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:02,046 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:02,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-10-16 04:36:02,047 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:02,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:02,047 INFO L85 PathProgramCache]: Analyzing trace with hash -551260215, now seen corresponding path program 1 times [2022-10-16 04:36:02,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:02,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756901449] [2022-10-16 04:36:02,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:02,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:02,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:02,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756901449] [2022-10-16 04:36:02,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756901449] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:36:02,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:36:02,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-16 04:36:02,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882131709] [2022-10-16 04:36:02,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:36:02,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-16 04:36:02,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:02,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-16 04:36:02,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-16 04:36:02,261 INFO L87 Difference]: Start difference. First operand 121 states and 160 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:02,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:02,312 INFO L93 Difference]: Finished difference Result 120 states and 159 transitions. [2022-10-16 04:36:02,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 04:36:02,313 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-10-16 04:36:02,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:02,314 INFO L225 Difference]: With dead ends: 120 [2022-10-16 04:36:02,314 INFO L226 Difference]: Without dead ends: 116 [2022-10-16 04:36:02,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-16 04:36:02,315 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 61 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:02,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 167 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:36:02,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-10-16 04:36:02,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-10-16 04:36:02,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 109 states have (on average 1.3761467889908257) internal successors, (150), 115 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:02,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 150 transitions. [2022-10-16 04:36:02,319 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 150 transitions. Word has length 19 [2022-10-16 04:36:02,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:02,320 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 150 transitions. [2022-10-16 04:36:02,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:02,320 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 150 transitions. [2022-10-16 04:36:02,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-16 04:36:02,321 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:02,321 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:02,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-10-16 04:36:02,322 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:02,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:02,322 INFO L85 PathProgramCache]: Analyzing trace with hash -498047866, now seen corresponding path program 1 times [2022-10-16 04:36:02,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:02,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503668000] [2022-10-16 04:36:02,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:02,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:02,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:02,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:02,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503668000] [2022-10-16 04:36:02,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503668000] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:36:02,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813724602] [2022-10-16 04:36:02,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:02,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:02,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:36:02,713 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) [2022-10-16 04:36:02,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-16 04:36:02,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:02,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 26 conjunts are in the unsatisfiable core [2022-10-16 04:36:02,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:36:02,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:36:03,042 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:36:03,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:36:03,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:03,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:36:03,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:36:03,166 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 20 treesize of output 16 [2022-10-16 04:36:03,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:03,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813724602] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:36:03,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:36:03,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-10-16 04:36:03,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532958394] [2022-10-16 04:36:03,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:36:03,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-16 04:36:03,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:03,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-16 04:36:03,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-10-16 04:36:03,297 INFO L87 Difference]: Start difference. First operand 116 states and 150 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:03,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:03,829 INFO L93 Difference]: Finished difference Result 273 states and 359 transitions. [2022-10-16 04:36:03,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-16 04:36:03,830 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-10-16 04:36:03,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:03,831 INFO L225 Difference]: With dead ends: 273 [2022-10-16 04:36:03,831 INFO L226 Difference]: Without dead ends: 273 [2022-10-16 04:36:03,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=853, Unknown=0, NotChecked=0, Total=1056 [2022-10-16 04:36:03,833 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 1071 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:03,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1071 Valid, 862 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 303 Invalid, 0 Unknown, 14 Unchecked, 0.3s Time] [2022-10-16 04:36:03,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-10-16 04:36:03,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 118. [2022-10-16 04:36:03,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 111 states have (on average 1.3693693693693694) internal successors, (152), 117 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:03,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 152 transitions. [2022-10-16 04:36:03,839 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 152 transitions. Word has length 19 [2022-10-16 04:36:03,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:03,839 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 152 transitions. [2022-10-16 04:36:03,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:03,839 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 152 transitions. [2022-10-16 04:36:03,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-16 04:36:03,840 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:03,840 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:03,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-10-16 04:36:04,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-10-16 04:36:04,055 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:04,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:04,056 INFO L85 PathProgramCache]: Analyzing trace with hash 2117969551, now seen corresponding path program 3 times [2022-10-16 04:36:04,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:04,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689372665] [2022-10-16 04:36:04,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:04,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:04,372 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:04,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:04,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689372665] [2022-10-16 04:36:04,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689372665] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:36:04,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846715875] [2022-10-16 04:36:04,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 04:36:04,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:04,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:36:04,376 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) [2022-10-16 04:36:04,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-16 04:36:04,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-10-16 04:36:04,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:36:04,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 36 conjunts are in the unsatisfiable core [2022-10-16 04:36:04,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:36:04,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:36:04,564 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-10-16 04:36:04,572 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-16 04:36:04,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-16 04:36:04,637 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:04,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:36:04,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:36:04,801 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 16 treesize of output 12 [2022-10-16 04:36:04,811 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:36:04,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-10-16 04:36:04,929 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:04,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846715875] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:36:04,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:36:04,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-10-16 04:36:04,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137251513] [2022-10-16 04:36:04,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:36:04,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-16 04:36:04,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:04,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-16 04:36:04,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-10-16 04:36:04,931 INFO L87 Difference]: Start difference. First operand 118 states and 152 transitions. Second operand has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:06,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:06,019 INFO L93 Difference]: Finished difference Result 398 states and 518 transitions. [2022-10-16 04:36:06,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-16 04:36:06,020 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-10-16 04:36:06,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:06,022 INFO L225 Difference]: With dead ends: 398 [2022-10-16 04:36:06,022 INFO L226 Difference]: Without dead ends: 398 [2022-10-16 04:36:06,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=1068, Unknown=0, NotChecked=0, Total=1332 [2022-10-16 04:36:06,024 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 1054 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1054 SdHoareTripleChecker+Valid, 1683 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:06,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1054 Valid, 1683 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1096 Invalid, 0 Unknown, 164 Unchecked, 0.7s Time] [2022-10-16 04:36:06,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-10-16 04:36:06,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 151. [2022-10-16 04:36:06,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 144 states have (on average 1.3819444444444444) internal successors, (199), 150 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:06,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 199 transitions. [2022-10-16 04:36:06,031 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 199 transitions. Word has length 19 [2022-10-16 04:36:06,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:06,031 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 199 transitions. [2022-10-16 04:36:06,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:06,032 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 199 transitions. [2022-10-16 04:36:06,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-16 04:36:06,032 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:06,033 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:06,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-16 04:36:06,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-10-16 04:36:06,249 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:06,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:06,250 INFO L85 PathProgramCache]: Analyzing trace with hash 429681775, now seen corresponding path program 1 times [2022-10-16 04:36:06,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:06,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464855505] [2022-10-16 04:36:06,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:06,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:06,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:06,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:06,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464855505] [2022-10-16 04:36:06,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464855505] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:36:06,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941810196] [2022-10-16 04:36:06,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:06,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:06,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:36:06,653 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:36:06,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-16 04:36:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:06,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 29 conjunts are in the unsatisfiable core [2022-10-16 04:36:06,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:36:06,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:36:06,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-16 04:36:06,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:06,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:36:07,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-10-16 04:36:07,042 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 12 treesize of output 8 [2022-10-16 04:36:07,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:07,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941810196] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:36:07,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:36:07,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-10-16 04:36:07,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330627050] [2022-10-16 04:36:07,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:36:07,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-10-16 04:36:07,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:07,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-10-16 04:36:07,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-10-16 04:36:07,168 INFO L87 Difference]: Start difference. First operand 151 states and 199 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:07,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:07,882 INFO L93 Difference]: Finished difference Result 307 states and 406 transitions. [2022-10-16 04:36:07,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-16 04:36:07,883 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-10-16 04:36:07,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:07,885 INFO L225 Difference]: With dead ends: 307 [2022-10-16 04:36:07,886 INFO L226 Difference]: Without dead ends: 307 [2022-10-16 04:36:07,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=266, Invalid=994, Unknown=0, NotChecked=0, Total=1260 [2022-10-16 04:36:07,887 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 1017 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1017 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:07,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1017 Valid, 1040 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 354 Invalid, 0 Unknown, 83 Unchecked, 0.3s Time] [2022-10-16 04:36:07,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-10-16 04:36:07,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 161. [2022-10-16 04:36:07,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 154 states have (on average 1.3831168831168832) internal successors, (213), 160 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:07,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 213 transitions. [2022-10-16 04:36:07,894 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 213 transitions. Word has length 20 [2022-10-16 04:36:07,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:07,894 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 213 transitions. [2022-10-16 04:36:07,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:07,895 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 213 transitions. [2022-10-16 04:36:07,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-16 04:36:07,895 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:07,896 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:07,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-16 04:36:08,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:08,110 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:08,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:08,111 INFO L85 PathProgramCache]: Analyzing trace with hash 617715477, now seen corresponding path program 1 times [2022-10-16 04:36:08,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:08,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294426188] [2022-10-16 04:36:08,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:08,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:08,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:08,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:08,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:08,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294426188] [2022-10-16 04:36:08,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294426188] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:36:08,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141003960] [2022-10-16 04:36:08,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:08,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:08,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:36:08,507 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:36:08,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-16 04:36:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:08,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 26 conjunts are in the unsatisfiable core [2022-10-16 04:36:08,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:36:08,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:36:08,871 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:36:08,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:36:08,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:08,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:36:09,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:36:09,003 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 20 treesize of output 16 [2022-10-16 04:36:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:09,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141003960] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:36:09,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:36:09,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-10-16 04:36:09,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200006635] [2022-10-16 04:36:09,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:36:09,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-16 04:36:09,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:09,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-16 04:36:09,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-10-16 04:36:09,119 INFO L87 Difference]: Start difference. First operand 161 states and 213 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:09,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:09,776 INFO L93 Difference]: Finished difference Result 312 states and 410 transitions. [2022-10-16 04:36:09,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-16 04:36:09,784 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-10-16 04:36:09,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:09,787 INFO L225 Difference]: With dead ends: 312 [2022-10-16 04:36:09,787 INFO L226 Difference]: Without dead ends: 312 [2022-10-16 04:36:09,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2022-10-16 04:36:09,790 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 951 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:09,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [951 Valid, 1122 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 364 Invalid, 0 Unknown, 128 Unchecked, 0.3s Time] [2022-10-16 04:36:09,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-10-16 04:36:09,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 157. [2022-10-16 04:36:09,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 150 states have (on average 1.3866666666666667) internal successors, (208), 156 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:09,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 208 transitions. [2022-10-16 04:36:09,804 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 208 transitions. Word has length 21 [2022-10-16 04:36:09,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:09,805 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 208 transitions. [2022-10-16 04:36:09,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:09,805 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 208 transitions. [2022-10-16 04:36:09,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-16 04:36:09,807 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:09,808 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:09,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-16 04:36:10,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:10,024 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:10,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:10,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1833895009, now seen corresponding path program 1 times [2022-10-16 04:36:10,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:10,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502934285] [2022-10-16 04:36:10,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:10,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:10,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:10,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:10,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:10,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502934285] [2022-10-16 04:36:10,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502934285] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:36:10,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125431705] [2022-10-16 04:36:10,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:10,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:10,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:36:10,413 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:36:10,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-16 04:36:10,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:10,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 26 conjunts are in the unsatisfiable core [2022-10-16 04:36:10,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:36:10,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:36:10,735 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:36:10,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:36:10,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:10,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:36:10,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:36:10,852 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 20 treesize of output 16 [2022-10-16 04:36:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:10,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125431705] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:36:10,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:36:10,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-10-16 04:36:10,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001594558] [2022-10-16 04:36:10,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:36:10,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-16 04:36:10,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:10,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-16 04:36:10,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-10-16 04:36:10,969 INFO L87 Difference]: Start difference. First operand 157 states and 208 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:11,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:11,446 INFO L93 Difference]: Finished difference Result 253 states and 331 transitions. [2022-10-16 04:36:11,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-16 04:36:11,447 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-10-16 04:36:11,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:11,449 INFO L225 Difference]: With dead ends: 253 [2022-10-16 04:36:11,449 INFO L226 Difference]: Without dead ends: 253 [2022-10-16 04:36:11,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2022-10-16 04:36:11,454 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 668 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:11,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [668 Valid, 1064 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 410 Invalid, 0 Unknown, 46 Unchecked, 0.3s Time] [2022-10-16 04:36:11,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-10-16 04:36:11,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 151. [2022-10-16 04:36:11,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 144 states have (on average 1.3958333333333333) internal successors, (201), 150 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:11,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 201 transitions. [2022-10-16 04:36:11,460 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 201 transitions. Word has length 21 [2022-10-16 04:36:11,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:11,461 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 201 transitions. [2022-10-16 04:36:11,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:11,463 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 201 transitions. [2022-10-16 04:36:11,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-16 04:36:11,464 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:11,464 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:11,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-16 04:36:11,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-10-16 04:36:11,681 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:11,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:11,682 INFO L85 PathProgramCache]: Analyzing trace with hash -445760440, now seen corresponding path program 4 times [2022-10-16 04:36:11,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:11,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143596586] [2022-10-16 04:36:11,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:11,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:11,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:11,995 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:11,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:11,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143596586] [2022-10-16 04:36:11,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143596586] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:36:11,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048412899] [2022-10-16 04:36:11,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-16 04:36:11,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:11,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:36:11,997 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:36:12,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-16 04:36:12,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-16 04:36:12,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:36:12,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-16 04:36:12,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:36:12,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:36:12,396 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:36:12,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:36:12,418 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:12,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:36:12,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:36:12,570 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 20 treesize of output 16 [2022-10-16 04:36:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:12,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048412899] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:36:12,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:36:12,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-10-16 04:36:12,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696984996] [2022-10-16 04:36:12,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:36:12,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-10-16 04:36:12,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:12,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-10-16 04:36:12,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-10-16 04:36:12,719 INFO L87 Difference]: Start difference. First operand 151 states and 201 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:13,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:13,494 INFO L93 Difference]: Finished difference Result 427 states and 568 transitions. [2022-10-16 04:36:13,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-16 04:36:13,497 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-10-16 04:36:13,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:13,499 INFO L225 Difference]: With dead ends: 427 [2022-10-16 04:36:13,499 INFO L226 Difference]: Without dead ends: 427 [2022-10-16 04:36:13,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2022-10-16 04:36:13,501 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 838 mSDsluCounter, 2524 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 2761 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:13,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [838 Valid, 2761 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 803 Invalid, 0 Unknown, 226 Unchecked, 0.5s Time] [2022-10-16 04:36:13,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-10-16 04:36:13,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 163. [2022-10-16 04:36:13,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 156 states have (on average 1.3846153846153846) internal successors, (216), 162 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:13,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 216 transitions. [2022-10-16 04:36:13,507 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 216 transitions. Word has length 21 [2022-10-16 04:36:13,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:13,508 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 216 transitions. [2022-10-16 04:36:13,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:13,508 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 216 transitions. [2022-10-16 04:36:13,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-16 04:36:13,508 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:13,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:13,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-16 04:36:13,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:13,723 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:13,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:13,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1358372599, now seen corresponding path program 1 times [2022-10-16 04:36:13,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:13,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947793293] [2022-10-16 04:36:13,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:13,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:13,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:13,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:13,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:13,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947793293] [2022-10-16 04:36:13,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947793293] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:36:13,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:36:13,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 04:36:13,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477073069] [2022-10-16 04:36:13,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:36:13,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 04:36:13,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:13,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 04:36:13,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 04:36:13,785 INFO L87 Difference]: Start difference. First operand 163 states and 216 transitions. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:13,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:13,804 INFO L93 Difference]: Finished difference Result 162 states and 215 transitions. [2022-10-16 04:36:13,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 04:36:13,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-10-16 04:36:13,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:13,806 INFO L225 Difference]: With dead ends: 162 [2022-10-16 04:36:13,806 INFO L226 Difference]: Without dead ends: 162 [2022-10-16 04:36:13,806 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 [2022-10-16 04:36:13,807 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 40 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:13,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 58 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:36:13,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-10-16 04:36:13,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-10-16 04:36:13,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 156 states have (on average 1.3782051282051282) internal successors, (215), 161 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:13,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 215 transitions. [2022-10-16 04:36:13,813 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 215 transitions. Word has length 22 [2022-10-16 04:36:13,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:13,813 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 215 transitions. [2022-10-16 04:36:13,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:13,813 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 215 transitions. [2022-10-16 04:36:13,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-16 04:36:13,814 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:13,814 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:13,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-10-16 04:36:13,814 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:13,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:13,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1358372600, now seen corresponding path program 1 times [2022-10-16 04:36:13,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:13,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729151372] [2022-10-16 04:36:13,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:13,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:13,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:13,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:13,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729151372] [2022-10-16 04:36:13,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729151372] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:36:13,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:36:13,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 04:36:13,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712173690] [2022-10-16 04:36:13,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:36:13,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 04:36:13,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:13,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 04:36:13,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 04:36:13,912 INFO L87 Difference]: Start difference. First operand 162 states and 215 transitions. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:13,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:13,936 INFO L93 Difference]: Finished difference Result 161 states and 214 transitions. [2022-10-16 04:36:13,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 04:36:13,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-10-16 04:36:13,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:13,938 INFO L225 Difference]: With dead ends: 161 [2022-10-16 04:36:13,938 INFO L226 Difference]: Without dead ends: 158 [2022-10-16 04:36:13,938 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 [2022-10-16 04:36:13,939 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 39 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:13,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 55 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:36:13,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-10-16 04:36:13,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2022-10-16 04:36:13,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.3398692810457515) internal successors, (205), 157 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:13,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 205 transitions. [2022-10-16 04:36:13,944 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 205 transitions. Word has length 22 [2022-10-16 04:36:13,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:13,944 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 205 transitions. [2022-10-16 04:36:13,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:13,945 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 205 transitions. [2022-10-16 04:36:13,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-16 04:36:13,945 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:13,945 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:13,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-10-16 04:36:13,946 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:13,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:13,946 INFO L85 PathProgramCache]: Analyzing trace with hash 833175970, now seen corresponding path program 1 times [2022-10-16 04:36:13,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:13,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120588341] [2022-10-16 04:36:13,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:13,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:13,962 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-16 04:36:13,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [138706026] [2022-10-16 04:36:13,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:13,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:13,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:36:13,964 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:36:13,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-16 04:36:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:14,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 24 conjunts are in the unsatisfiable core [2022-10-16 04:36:14,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:36:14,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:36:14,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:36:14,352 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:36:14,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:36:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:14,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 04:36:14,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:14,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120588341] [2022-10-16 04:36:14,364 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-16 04:36:14,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138706026] [2022-10-16 04:36:14,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138706026] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:36:14,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:36:14,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-16 04:36:14,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083162218] [2022-10-16 04:36:14,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:36:14,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 04:36:14,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:14,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 04:36:14,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-10-16 04:36:14,366 INFO L87 Difference]: Start difference. First operand 158 states and 205 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:14,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:14,415 INFO L93 Difference]: Finished difference Result 173 states and 221 transitions. [2022-10-16 04:36:14,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 04:36:14,415 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-10-16 04:36:14,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:14,416 INFO L225 Difference]: With dead ends: 173 [2022-10-16 04:36:14,417 INFO L226 Difference]: Without dead ends: 170 [2022-10-16 04:36:14,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-10-16 04:36:14,418 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 17 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:14,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 259 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 39 Unchecked, 0.0s Time] [2022-10-16 04:36:14,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-10-16 04:36:14,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2022-10-16 04:36:14,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.3251533742331287) internal successors, (216), 167 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:14,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 216 transitions. [2022-10-16 04:36:14,422 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 216 transitions. Word has length 25 [2022-10-16 04:36:14,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:14,422 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 216 transitions. [2022-10-16 04:36:14,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:14,423 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 216 transitions. [2022-10-16 04:36:14,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-16 04:36:14,423 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:14,424 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:14,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-16 04:36:14,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-10-16 04:36:14,639 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:14,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:14,640 INFO L85 PathProgramCache]: Analyzing trace with hash -854381118, now seen corresponding path program 2 times [2022-10-16 04:36:14,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:14,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715845404] [2022-10-16 04:36:14,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:14,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:15,025 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:15,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:15,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715845404] [2022-10-16 04:36:15,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715845404] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:36:15,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116391605] [2022-10-16 04:36:15,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 04:36:15,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:15,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:36:15,028 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:36:15,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-16 04:36:15,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 04:36:15,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:36:15,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-16 04:36:15,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:36:15,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:36:15,475 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:36:15,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:36:15,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:15,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:36:15,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:36:15,654 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 20 treesize of output 16 [2022-10-16 04:36:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:15,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116391605] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:36:15,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:36:15,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-10-16 04:36:15,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85586626] [2022-10-16 04:36:15,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:36:15,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-10-16 04:36:15,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:15,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-10-16 04:36:15,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-10-16 04:36:15,820 INFO L87 Difference]: Start difference. First operand 168 states and 216 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:16,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:16,802 INFO L93 Difference]: Finished difference Result 383 states and 495 transitions. [2022-10-16 04:36:16,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-16 04:36:16,803 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-10-16 04:36:16,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:16,806 INFO L225 Difference]: With dead ends: 383 [2022-10-16 04:36:16,807 INFO L226 Difference]: Without dead ends: 383 [2022-10-16 04:36:16,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=208, Invalid=1198, Unknown=0, NotChecked=0, Total=1406 [2022-10-16 04:36:16,808 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 1431 mSDsluCounter, 1940 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1431 SdHoareTripleChecker+Valid, 2112 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:16,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1431 Valid, 2112 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 926 Invalid, 0 Unknown, 28 Unchecked, 0.7s Time] [2022-10-16 04:36:16,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-10-16 04:36:16,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 170. [2022-10-16 04:36:16,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.3212121212121213) internal successors, (218), 169 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:16,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 218 transitions. [2022-10-16 04:36:16,816 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 218 transitions. Word has length 25 [2022-10-16 04:36:16,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:16,817 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 218 transitions. [2022-10-16 04:36:16,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:16,817 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 218 transitions. [2022-10-16 04:36:16,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-16 04:36:16,818 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:16,818 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:16,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-10-16 04:36:17,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-10-16 04:36:17,032 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:17,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:17,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1399455861, now seen corresponding path program 5 times [2022-10-16 04:36:17,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:17,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458808891] [2022-10-16 04:36:17,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:17,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:17,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:17,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:17,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458808891] [2022-10-16 04:36:17,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458808891] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:36:17,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516317792] [2022-10-16 04:36:17,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-16 04:36:17,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:17,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:36:17,416 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:36:17,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-16 04:36:17,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-10-16 04:36:17,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:36:17,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 38 conjunts are in the unsatisfiable core [2022-10-16 04:36:17,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:36:17,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 04:36:17,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 04:36:17,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:36:17,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-10-16 04:36:17,773 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-16 04:36:17,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-16 04:36:17,924 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:17,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:36:18,567 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:18,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516317792] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:36:18,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:36:18,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2022-10-16 04:36:18,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076296515] [2022-10-16 04:36:18,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:36:18,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-10-16 04:36:18,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:18,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-10-16 04:36:18,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2022-10-16 04:36:18,569 INFO L87 Difference]: Start difference. First operand 170 states and 218 transitions. Second operand has 30 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:20,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:20,598 INFO L93 Difference]: Finished difference Result 509 states and 660 transitions. [2022-10-16 04:36:20,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-10-16 04:36:20,599 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-10-16 04:36:20,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:20,603 INFO L225 Difference]: With dead ends: 509 [2022-10-16 04:36:20,603 INFO L226 Difference]: Without dead ends: 509 [2022-10-16 04:36:20,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=419, Invalid=1743, Unknown=0, NotChecked=0, Total=2162 [2022-10-16 04:36:20,605 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 1251 mSDsluCounter, 1939 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 2189 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:20,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1251 Valid, 2189 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1216 Invalid, 0 Unknown, 63 Unchecked, 1.0s Time] [2022-10-16 04:36:20,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-10-16 04:36:20,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 203. [2022-10-16 04:36:20,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.3282828282828283) internal successors, (263), 202 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:20,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 263 transitions. [2022-10-16 04:36:20,613 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 263 transitions. Word has length 25 [2022-10-16 04:36:20,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:20,613 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 263 transitions. [2022-10-16 04:36:20,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:20,613 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 263 transitions. [2022-10-16 04:36:20,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-16 04:36:20,614 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:20,614 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:20,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-10-16 04:36:20,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-10-16 04:36:20,827 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:20,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:20,828 INFO L85 PathProgramCache]: Analyzing trace with hash -68781113, now seen corresponding path program 1 times [2022-10-16 04:36:20,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:20,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852615178] [2022-10-16 04:36:20,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:20,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:20,842 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-16 04:36:20,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525429900] [2022-10-16 04:36:20,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:20,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:20,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:36:20,844 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:36:20,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-10-16 04:36:20,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:20,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 24 conjunts are in the unsatisfiable core [2022-10-16 04:36:20,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:36:20,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:36:21,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:36:21,237 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:36:21,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:36:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:21,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 04:36:21,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:21,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852615178] [2022-10-16 04:36:21,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-16 04:36:21,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525429900] [2022-10-16 04:36:21,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525429900] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:36:21,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:36:21,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-16 04:36:21,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344422756] [2022-10-16 04:36:21,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:36:21,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 04:36:21,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:21,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 04:36:21,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-10-16 04:36:21,251 INFO L87 Difference]: Start difference. First operand 203 states and 263 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:21,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:21,304 INFO L93 Difference]: Finished difference Result 208 states and 267 transitions. [2022-10-16 04:36:21,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 04:36:21,305 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-10-16 04:36:21,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:21,306 INFO L225 Difference]: With dead ends: 208 [2022-10-16 04:36:21,306 INFO L226 Difference]: Without dead ends: 202 [2022-10-16 04:36:21,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-10-16 04:36:21,307 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 14 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:21,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 295 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 39 Unchecked, 0.0s Time] [2022-10-16 04:36:21,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-10-16 04:36:21,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2022-10-16 04:36:21,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.3265306122448979) internal successors, (260), 200 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:21,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 260 transitions. [2022-10-16 04:36:21,313 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 260 transitions. Word has length 26 [2022-10-16 04:36:21,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:21,313 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 260 transitions. [2022-10-16 04:36:21,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:21,313 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 260 transitions. [2022-10-16 04:36:21,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-16 04:36:21,314 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:21,314 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:21,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-10-16 04:36:21,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-10-16 04:36:21,518 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:21,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:21,519 INFO L85 PathProgramCache]: Analyzing trace with hash 638527781, now seen corresponding path program 1 times [2022-10-16 04:36:21,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:21,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514737318] [2022-10-16 04:36:21,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:21,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:21,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:21,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:21,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514737318] [2022-10-16 04:36:21,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514737318] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:36:21,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872864589] [2022-10-16 04:36:21,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:21,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:21,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:36:21,858 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:36:21,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-10-16 04:36:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:21,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2022-10-16 04:36:21,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:36:22,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:36:22,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-16 04:36:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:22,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:36:22,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-10-16 04:36:22,451 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 16 treesize of output 12 [2022-10-16 04:36:22,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:22,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872864589] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:36:22,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:36:22,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-10-16 04:36:22,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471801425] [2022-10-16 04:36:22,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:36:22,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-16 04:36:22,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:22,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-16 04:36:22,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-10-16 04:36:22,693 INFO L87 Difference]: Start difference. First operand 201 states and 260 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:23,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:23,319 INFO L93 Difference]: Finished difference Result 269 states and 344 transitions. [2022-10-16 04:36:23,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-16 04:36:23,320 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-10-16 04:36:23,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:23,321 INFO L225 Difference]: With dead ends: 269 [2022-10-16 04:36:23,321 INFO L226 Difference]: Without dead ends: 269 [2022-10-16 04:36:23,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2022-10-16 04:36:23,323 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 472 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:23,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 956 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 294 Invalid, 0 Unknown, 104 Unchecked, 0.3s Time] [2022-10-16 04:36:23,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-10-16 04:36:23,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 213. [2022-10-16 04:36:23,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.3269230769230769) internal successors, (276), 212 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:23,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 276 transitions. [2022-10-16 04:36:23,329 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 276 transitions. Word has length 26 [2022-10-16 04:36:23,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:23,329 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 276 transitions. [2022-10-16 04:36:23,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:23,329 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 276 transitions. [2022-10-16 04:36:23,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-16 04:36:23,330 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:23,330 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:23,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-10-16 04:36:23,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:23,545 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:23,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:23,546 INFO L85 PathProgramCache]: Analyzing trace with hash -2026714445, now seen corresponding path program 1 times [2022-10-16 04:36:23,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:23,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097813886] [2022-10-16 04:36:23,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:23,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:23,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:23,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:23,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:23,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097813886] [2022-10-16 04:36:23,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097813886] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:36:23,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356479018] [2022-10-16 04:36:23,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:23,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:23,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:36:23,941 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:36:23,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-10-16 04:36:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:24,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 35 conjunts are in the unsatisfiable core [2022-10-16 04:36:24,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:36:24,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:36:24,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-16 04:36:24,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:24,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:36:24,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-10-16 04:36:24,644 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 16 treesize of output 12 [2022-10-16 04:36:24,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:24,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356479018] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:36:24,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:36:24,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 33 [2022-10-16 04:36:24,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668439610] [2022-10-16 04:36:24,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:36:24,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-10-16 04:36:24,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:24,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-10-16 04:36:24,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2022-10-16 04:36:24,997 INFO L87 Difference]: Start difference. First operand 213 states and 276 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:26,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:26,249 INFO L93 Difference]: Finished difference Result 436 states and 564 transitions. [2022-10-16 04:36:26,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-10-16 04:36:26,249 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-10-16 04:36:26,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:26,252 INFO L225 Difference]: With dead ends: 436 [2022-10-16 04:36:26,252 INFO L226 Difference]: Without dead ends: 436 [2022-10-16 04:36:26,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=311, Invalid=1945, Unknown=0, NotChecked=0, Total=2256 [2022-10-16 04:36:26,254 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 868 mSDsluCounter, 2468 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 2649 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:26,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [868 Valid, 2649 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1137 Invalid, 0 Unknown, 109 Unchecked, 0.8s Time] [2022-10-16 04:36:26,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-10-16 04:36:26,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 223. [2022-10-16 04:36:26,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.3302752293577982) internal successors, (290), 222 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:26,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 290 transitions. [2022-10-16 04:36:26,262 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 290 transitions. Word has length 26 [2022-10-16 04:36:26,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:26,262 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 290 transitions. [2022-10-16 04:36:26,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:26,262 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 290 transitions. [2022-10-16 04:36:26,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-16 04:36:26,263 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:26,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:26,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-10-16 04:36:26,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:26,478 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:26,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:26,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1066359323, now seen corresponding path program 1 times [2022-10-16 04:36:26,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:26,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968995103] [2022-10-16 04:36:26,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:26,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:26,495 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-16 04:36:26,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107185093] [2022-10-16 04:36:26,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:26,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:26,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:36:26,497 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:36:26,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-10-16 04:36:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:26,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 24 conjunts are in the unsatisfiable core [2022-10-16 04:36:26,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:36:26,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:36:26,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:36:26,916 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:36:26,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:36:26,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:26,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 04:36:26,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:26,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968995103] [2022-10-16 04:36:26,928 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-16 04:36:26,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107185093] [2022-10-16 04:36:26,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107185093] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:36:26,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:36:26,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-16 04:36:26,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840028817] [2022-10-16 04:36:26,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:36:26,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 04:36:26,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:26,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 04:36:26,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-10-16 04:36:26,930 INFO L87 Difference]: Start difference. First operand 223 states and 290 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:26,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:26,984 INFO L93 Difference]: Finished difference Result 231 states and 298 transitions. [2022-10-16 04:36:26,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 04:36:26,990 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-10-16 04:36:26,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:26,992 INFO L225 Difference]: With dead ends: 231 [2022-10-16 04:36:26,992 INFO L226 Difference]: Without dead ends: 228 [2022-10-16 04:36:26,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-10-16 04:36:26,993 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 15 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:26,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 286 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 54 Unchecked, 0.0s Time] [2022-10-16 04:36:26,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-10-16 04:36:26,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2022-10-16 04:36:26,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.3243243243243243) internal successors, (294), 226 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:27,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 294 transitions. [2022-10-16 04:36:27,000 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 294 transitions. Word has length 27 [2022-10-16 04:36:27,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:27,000 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 294 transitions. [2022-10-16 04:36:27,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:27,001 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 294 transitions. [2022-10-16 04:36:27,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-16 04:36:27,001 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:27,001 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:27,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-10-16 04:36:27,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:27,215 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:27,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:27,216 INFO L85 PathProgramCache]: Analyzing trace with hash -478449138, now seen corresponding path program 1 times [2022-10-16 04:36:27,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:27,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339815988] [2022-10-16 04:36:27,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:27,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:27,232 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-16 04:36:27,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298485115] [2022-10-16 04:36:27,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:27,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:27,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:36:27,234 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:36:27,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-10-16 04:36:27,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:27,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 28 conjunts are in the unsatisfiable core [2022-10-16 04:36:27,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:36:27,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:36:27,529 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:36:27,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:36:27,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:27,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:36:27,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:36:27,615 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 16 treesize of output 12 [2022-10-16 04:36:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:27,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:27,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339815988] [2022-10-16 04:36:27,711 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-16 04:36:27,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298485115] [2022-10-16 04:36:27,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298485115] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:36:27,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:36:27,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-10-16 04:36:27,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293669045] [2022-10-16 04:36:27,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:36:27,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-16 04:36:27,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:27,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-16 04:36:27,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-10-16 04:36:27,714 INFO L87 Difference]: Start difference. First operand 227 states and 294 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:27,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:27,968 INFO L93 Difference]: Finished difference Result 268 states and 343 transitions. [2022-10-16 04:36:27,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-16 04:36:27,969 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-10-16 04:36:27,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:27,971 INFO L225 Difference]: With dead ends: 268 [2022-10-16 04:36:27,971 INFO L226 Difference]: Without dead ends: 257 [2022-10-16 04:36:27,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-10-16 04:36:27,973 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 93 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:27,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 584 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 198 Invalid, 0 Unknown, 77 Unchecked, 0.2s Time] [2022-10-16 04:36:27,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-10-16 04:36:27,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 227. [2022-10-16 04:36:27,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.3198198198198199) internal successors, (293), 226 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:27,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 293 transitions. [2022-10-16 04:36:27,982 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 293 transitions. Word has length 27 [2022-10-16 04:36:27,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:27,983 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 293 transitions. [2022-10-16 04:36:27,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:27,983 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 293 transitions. [2022-10-16 04:36:27,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-16 04:36:27,984 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:27,984 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:28,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-10-16 04:36:28,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:28,200 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:28,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:28,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1778843985, now seen corresponding path program 1 times [2022-10-16 04:36:28,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:28,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336413075] [2022-10-16 04:36:28,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:28,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:28,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:28,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:28,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:28,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336413075] [2022-10-16 04:36:28,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336413075] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:36:28,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326030394] [2022-10-16 04:36:28,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:28,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:28,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:36:28,549 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:36:28,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-10-16 04:36:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:28,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-16 04:36:28,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:36:28,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:36:29,058 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:36:29,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:36:29,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:29,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:36:29,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:36:29,258 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 20 treesize of output 16 [2022-10-16 04:36:29,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:29,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326030394] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:36:29,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:36:29,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-10-16 04:36:29,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385684965] [2022-10-16 04:36:29,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:36:29,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-10-16 04:36:29,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:29,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-10-16 04:36:29,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-10-16 04:36:29,434 INFO L87 Difference]: Start difference. First operand 227 states and 293 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:30,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:30,174 INFO L93 Difference]: Finished difference Result 379 states and 487 transitions. [2022-10-16 04:36:30,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-16 04:36:30,176 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-10-16 04:36:30,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:30,179 INFO L225 Difference]: With dead ends: 379 [2022-10-16 04:36:30,179 INFO L226 Difference]: Without dead ends: 379 [2022-10-16 04:36:30,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2022-10-16 04:36:30,180 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 587 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 1667 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:30,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 1667 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 647 Invalid, 0 Unknown, 76 Unchecked, 0.5s Time] [2022-10-16 04:36:30,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-10-16 04:36:30,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 223. [2022-10-16 04:36:30,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.3211009174311927) internal successors, (288), 222 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:30,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 288 transitions. [2022-10-16 04:36:30,188 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 288 transitions. Word has length 27 [2022-10-16 04:36:30,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:30,188 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 288 transitions. [2022-10-16 04:36:30,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:30,188 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 288 transitions. [2022-10-16 04:36:30,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-16 04:36:30,189 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:30,189 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:30,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-10-16 04:36:30,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:30,402 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:30,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:30,403 INFO L85 PathProgramCache]: Analyzing trace with hash -672766501, now seen corresponding path program 2 times [2022-10-16 04:36:30,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:30,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227356650] [2022-10-16 04:36:30,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:30,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:30,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:30,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:30,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227356650] [2022-10-16 04:36:30,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227356650] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:36:30,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247443289] [2022-10-16 04:36:30,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 04:36:30,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:30,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:36:30,729 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:36:30,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-10-16 04:36:30,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 04:36:30,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:36:30,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-16 04:36:30,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:36:30,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:36:31,143 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:36:31,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:36:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:31,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:36:31,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:36:31,324 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 20 treesize of output 16 [2022-10-16 04:36:31,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:31,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247443289] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:36:31,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:36:31,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-10-16 04:36:31,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070025550] [2022-10-16 04:36:31,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:36:31,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-10-16 04:36:31,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:31,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-10-16 04:36:31,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-10-16 04:36:31,470 INFO L87 Difference]: Start difference. First operand 223 states and 288 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:32,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:32,508 INFO L93 Difference]: Finished difference Result 387 states and 498 transitions. [2022-10-16 04:36:32,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-16 04:36:32,509 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 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 27 [2022-10-16 04:36:32,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:32,512 INFO L225 Difference]: With dead ends: 387 [2022-10-16 04:36:32,512 INFO L226 Difference]: Without dead ends: 387 [2022-10-16 04:36:32,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2022-10-16 04:36:32,514 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 673 mSDsluCounter, 2241 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 2428 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:32,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 2428 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 979 Invalid, 0 Unknown, 21 Unchecked, 0.7s Time] [2022-10-16 04:36:32,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-10-16 04:36:32,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 217. [2022-10-16 04:36:32,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.3254716981132075) internal successors, (281), 216 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:32,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 281 transitions. [2022-10-16 04:36:32,522 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 281 transitions. Word has length 27 [2022-10-16 04:36:32,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:32,523 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 281 transitions. [2022-10-16 04:36:32,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:32,523 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 281 transitions. [2022-10-16 04:36:32,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-16 04:36:32,524 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:32,524 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:32,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-10-16 04:36:32,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:32,738 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:32,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:32,739 INFO L85 PathProgramCache]: Analyzing trace with hash -552319420, now seen corresponding path program 6 times [2022-10-16 04:36:32,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:32,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911539574] [2022-10-16 04:36:32,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:32,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:32,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:33,142 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:33,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:33,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911539574] [2022-10-16 04:36:33,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911539574] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:36:33,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115571192] [2022-10-16 04:36:33,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-10-16 04:36:33,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:33,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:36:33,145 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:36:33,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-10-16 04:36:33,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-10-16 04:36:33,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:36:33,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 40 conjunts are in the unsatisfiable core [2022-10-16 04:36:33,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:36:33,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:36:33,710 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:36:33,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:36:33,736 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:33,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:36:33,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:36:33,963 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 20 treesize of output 16 [2022-10-16 04:36:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:34,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115571192] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:36:34,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:36:34,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-10-16 04:36:34,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439315830] [2022-10-16 04:36:34,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:36:34,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-10-16 04:36:34,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:34,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-10-16 04:36:34,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2022-10-16 04:36:34,167 INFO L87 Difference]: Start difference. First operand 217 states and 281 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:35,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:35,945 INFO L93 Difference]: Finished difference Result 584 states and 759 transitions. [2022-10-16 04:36:35,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-10-16 04:36:35,947 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 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 27 [2022-10-16 04:36:35,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:35,950 INFO L225 Difference]: With dead ends: 584 [2022-10-16 04:36:35,950 INFO L226 Difference]: Without dead ends: 584 [2022-10-16 04:36:35,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=258, Invalid=1812, Unknown=0, NotChecked=0, Total=2070 [2022-10-16 04:36:35,952 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 1813 mSDsluCounter, 4232 mSDsCounter, 0 mSdLazyCounter, 1847 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1813 SdHoareTripleChecker+Valid, 4500 SdHoareTripleChecker+Invalid, 2382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:35,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1813 Valid, 4500 Invalid, 2382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1847 Invalid, 0 Unknown, 375 Unchecked, 1.3s Time] [2022-10-16 04:36:35,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-10-16 04:36:35,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 231. [2022-10-16 04:36:35,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.323008849557522) internal successors, (299), 230 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:35,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 299 transitions. [2022-10-16 04:36:35,961 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 299 transitions. Word has length 27 [2022-10-16 04:36:35,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:35,961 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 299 transitions. [2022-10-16 04:36:35,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:35,962 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 299 transitions. [2022-10-16 04:36:35,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-16 04:36:35,962 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:35,962 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:36,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-10-16 04:36:36,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-10-16 04:36:36,177 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:36,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:36,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1175166948, now seen corresponding path program 1 times [2022-10-16 04:36:36,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:36,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475465702] [2022-10-16 04:36:36,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:36,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:36,193 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-16 04:36:36,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [956651651] [2022-10-16 04:36:36,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:36,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:36,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:36:36,195 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:36:36,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-10-16 04:36:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:36,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-16 04:36:36,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:36:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 04:36:36,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 04:36:36,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:36,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475465702] [2022-10-16 04:36:36,313 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-16 04:36:36,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956651651] [2022-10-16 04:36:36,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956651651] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:36:36,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:36:36,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 04:36:36,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128105092] [2022-10-16 04:36:36,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:36:36,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 04:36:36,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:36,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 04:36:36,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 04:36:36,315 INFO L87 Difference]: Start difference. First operand 231 states and 299 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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) [2022-10-16 04:36:36,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:36,355 INFO L93 Difference]: Finished difference Result 311 states and 396 transitions. [2022-10-16 04:36:36,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 04:36:36,356 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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 [2022-10-16 04:36:36,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:36,358 INFO L225 Difference]: With dead ends: 311 [2022-10-16 04:36:36,358 INFO L226 Difference]: Without dead ends: 297 [2022-10-16 04:36:36,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-16 04:36:36,359 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 31 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:36,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 173 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:36:36,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-10-16 04:36:36,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 222. [2022-10-16 04:36:36,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 217 states have (on average 1.3317972350230414) internal successors, (289), 221 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:36,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 289 transitions. [2022-10-16 04:36:36,365 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 289 transitions. Word has length 28 [2022-10-16 04:36:36,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:36,365 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 289 transitions. [2022-10-16 04:36:36,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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) [2022-10-16 04:36:36,365 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 289 transitions. [2022-10-16 04:36:36,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-16 04:36:36,366 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:36,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:36,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-10-16 04:36:36,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-10-16 04:36:36,579 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:36,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:36,580 INFO L85 PathProgramCache]: Analyzing trace with hash -553499126, now seen corresponding path program 1 times [2022-10-16 04:36:36,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:36,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390107546] [2022-10-16 04:36:36,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:36,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:36,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:36,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390107546] [2022-10-16 04:36:36,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390107546] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:36:36,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038319572] [2022-10-16 04:36:36,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:36,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:36,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:36:36,887 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:36:36,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-10-16 04:36:36,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:36,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 25 conjunts are in the unsatisfiable core [2022-10-16 04:36:36,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:36:37,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:36:37,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-16 04:36:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:37,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:36:37,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-10-16 04:36:37,405 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 16 treesize of output 12 [2022-10-16 04:36:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:37,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038319572] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:36:37,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:36:37,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-10-16 04:36:37,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513520823] [2022-10-16 04:36:37,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:36:37,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-10-16 04:36:37,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:37,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-10-16 04:36:37,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-10-16 04:36:37,661 INFO L87 Difference]: Start difference. First operand 222 states and 289 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:38,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:38,124 INFO L93 Difference]: Finished difference Result 279 states and 357 transitions. [2022-10-16 04:36:38,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-16 04:36:38,127 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 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 [2022-10-16 04:36:38,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:38,128 INFO L225 Difference]: With dead ends: 279 [2022-10-16 04:36:38,129 INFO L226 Difference]: Without dead ends: 279 [2022-10-16 04:36:38,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2022-10-16 04:36:38,131 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 342 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:38,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 589 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 197 Invalid, 0 Unknown, 87 Unchecked, 0.2s Time] [2022-10-16 04:36:38,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-10-16 04:36:38,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 225. [2022-10-16 04:36:38,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.3272727272727274) internal successors, (292), 224 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:38,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 292 transitions. [2022-10-16 04:36:38,142 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 292 transitions. Word has length 28 [2022-10-16 04:36:38,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:38,142 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 292 transitions. [2022-10-16 04:36:38,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:38,143 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 292 transitions. [2022-10-16 04:36:38,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-16 04:36:38,143 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:38,143 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:38,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-10-16 04:36:38,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-10-16 04:36:38,355 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:38,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:38,356 INFO L85 PathProgramCache]: Analyzing trace with hash -806363911, now seen corresponding path program 1 times [2022-10-16 04:36:38,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:38,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941150283] [2022-10-16 04:36:38,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:38,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:38,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:38,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:38,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:38,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941150283] [2022-10-16 04:36:38,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941150283] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:36:38,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273944118] [2022-10-16 04:36:38,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:38,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:38,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:36:38,720 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:36:38,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-10-16 04:36:38,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:38,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 31 conjunts are in the unsatisfiable core [2022-10-16 04:36:38,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:36:38,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:36:39,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-16 04:36:39,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:39,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:36:39,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-10-16 04:36:39,300 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 16 treesize of output 12 [2022-10-16 04:36:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:39,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273944118] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:36:39,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:36:39,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 30 [2022-10-16 04:36:39,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577829294] [2022-10-16 04:36:39,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:36:39,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-10-16 04:36:39,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:39,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-10-16 04:36:39,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-10-16 04:36:39,630 INFO L87 Difference]: Start difference. First operand 225 states and 292 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:40,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:40,389 INFO L93 Difference]: Finished difference Result 343 states and 440 transitions. [2022-10-16 04:36:40,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-16 04:36:40,391 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-10-16 04:36:40,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:40,392 INFO L225 Difference]: With dead ends: 343 [2022-10-16 04:36:40,392 INFO L226 Difference]: Without dead ends: 343 [2022-10-16 04:36:40,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=227, Invalid=1333, Unknown=0, NotChecked=0, Total=1560 [2022-10-16 04:36:40,394 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 715 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 1402 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:40,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [715 Valid, 1402 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 597 Invalid, 0 Unknown, 130 Unchecked, 0.4s Time] [2022-10-16 04:36:40,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-10-16 04:36:40,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 241. [2022-10-16 04:36:40,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.3305084745762712) internal successors, (314), 240 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:40,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 314 transitions. [2022-10-16 04:36:40,401 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 314 transitions. Word has length 28 [2022-10-16 04:36:40,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:40,401 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 314 transitions. [2022-10-16 04:36:40,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:40,401 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 314 transitions. [2022-10-16 04:36:40,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-16 04:36:40,402 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:40,402 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:40,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-10-16 04:36:40,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:40,617 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:40,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:40,619 INFO L85 PathProgramCache]: Analyzing trace with hash 153884711, now seen corresponding path program 1 times [2022-10-16 04:36:40,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:40,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449827924] [2022-10-16 04:36:40,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:40,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:40,635 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-16 04:36:40,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937415696] [2022-10-16 04:36:40,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:40,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:40,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:36:40,637 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:36:40,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-10-16 04:36:40,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:40,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 28 conjunts are in the unsatisfiable core [2022-10-16 04:36:40,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:36:40,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:36:40,978 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:36:40,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:36:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:40,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:36:41,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:36:41,069 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 16 treesize of output 12 [2022-10-16 04:36:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:41,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:41,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449827924] [2022-10-16 04:36:41,174 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-16 04:36:41,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937415696] [2022-10-16 04:36:41,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937415696] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:36:41,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:36:41,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-10-16 04:36:41,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618672756] [2022-10-16 04:36:41,175 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:36:41,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-16 04:36:41,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:41,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-16 04:36:41,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-10-16 04:36:41,176 INFO L87 Difference]: Start difference. First operand 241 states and 314 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:41,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:41,437 INFO L93 Difference]: Finished difference Result 267 states and 344 transitions. [2022-10-16 04:36:41,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-16 04:36:41,438 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-10-16 04:36:41,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:41,440 INFO L225 Difference]: With dead ends: 267 [2022-10-16 04:36:41,440 INFO L226 Difference]: Without dead ends: 254 [2022-10-16 04:36:41,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-10-16 04:36:41,441 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 53 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:41,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 439 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 191 Invalid, 0 Unknown, 74 Unchecked, 0.2s Time] [2022-10-16 04:36:41,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-10-16 04:36:41,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 241. [2022-10-16 04:36:41,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.326271186440678) internal successors, (313), 240 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:41,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 313 transitions. [2022-10-16 04:36:41,447 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 313 transitions. Word has length 29 [2022-10-16 04:36:41,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:41,448 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 313 transitions. [2022-10-16 04:36:41,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:41,448 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 313 transitions. [2022-10-16 04:36:41,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-10-16 04:36:41,449 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:41,449 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:41,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-10-16 04:36:41,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-10-16 04:36:41,662 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:41,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:41,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1819978530, now seen corresponding path program 1 times [2022-10-16 04:36:41,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:41,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860819587] [2022-10-16 04:36:41,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:41,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:41,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:41,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:41,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860819587] [2022-10-16 04:36:41,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860819587] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:36:41,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912194705] [2022-10-16 04:36:41,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:41,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:41,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:36:41,991 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:36:41,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-10-16 04:36:42,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:42,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 31 conjunts are in the unsatisfiable core [2022-10-16 04:36:42,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:36:42,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:36:42,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-10-16 04:36:42,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:42,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:36:42,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-10-16 04:36:42,496 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 12 treesize of output 8 [2022-10-16 04:36:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:42,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912194705] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:36:42,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:36:42,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-10-16 04:36:42,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958726167] [2022-10-16 04:36:42,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:36:42,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-16 04:36:42,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:42,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-16 04:36:42,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-10-16 04:36:42,661 INFO L87 Difference]: Start difference. First operand 241 states and 313 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:43,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:43,357 INFO L93 Difference]: Finished difference Result 343 states and 438 transitions. [2022-10-16 04:36:43,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-10-16 04:36:43,358 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 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 30 [2022-10-16 04:36:43,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:43,359 INFO L225 Difference]: With dead ends: 343 [2022-10-16 04:36:43,359 INFO L226 Difference]: Without dead ends: 343 [2022-10-16 04:36:43,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=207, Invalid=1053, Unknown=0, NotChecked=0, Total=1260 [2022-10-16 04:36:43,360 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 723 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:43,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [723 Valid, 1126 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 499 Invalid, 0 Unknown, 94 Unchecked, 0.4s Time] [2022-10-16 04:36:43,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-10-16 04:36:43,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 229. [2022-10-16 04:36:43,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.3258928571428572) internal successors, (297), 228 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:43,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 297 transitions. [2022-10-16 04:36:43,368 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 297 transitions. Word has length 30 [2022-10-16 04:36:43,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:43,368 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 297 transitions. [2022-10-16 04:36:43,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:43,368 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 297 transitions. [2022-10-16 04:36:43,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-10-16 04:36:43,369 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:43,369 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:43,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-10-16 04:36:43,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-10-16 04:36:43,584 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:43,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:43,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1263383010, now seen corresponding path program 1 times [2022-10-16 04:36:43,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:43,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933051400] [2022-10-16 04:36:43,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:43,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:43,602 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-16 04:36:43,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653720178] [2022-10-16 04:36:43,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:43,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:43,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:36:43,603 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:36:43,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-10-16 04:36:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:43,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2022-10-16 04:36:43,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:36:43,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:36:43,920 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:36:43,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:36:43,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:43,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:36:44,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:36:44,022 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 16 treesize of output 12 [2022-10-16 04:36:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:44,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:44,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933051400] [2022-10-16 04:36:44,120 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-16 04:36:44,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653720178] [2022-10-16 04:36:44,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653720178] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:36:44,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:36:44,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-10-16 04:36:44,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497446926] [2022-10-16 04:36:44,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:36:44,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-16 04:36:44,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:44,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-16 04:36:44,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-10-16 04:36:44,122 INFO L87 Difference]: Start difference. First operand 229 states and 297 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:44,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:44,349 INFO L93 Difference]: Finished difference Result 276 states and 352 transitions. [2022-10-16 04:36:44,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-16 04:36:44,350 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-10-16 04:36:44,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:44,351 INFO L225 Difference]: With dead ends: 276 [2022-10-16 04:36:44,351 INFO L226 Difference]: Without dead ends: 221 [2022-10-16 04:36:44,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-10-16 04:36:44,352 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 65 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:44,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 321 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 132 Invalid, 0 Unknown, 62 Unchecked, 0.1s Time] [2022-10-16 04:36:44,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-10-16 04:36:44,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2022-10-16 04:36:44,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.3287037037037037) internal successors, (287), 220 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:44,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 287 transitions. [2022-10-16 04:36:44,365 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 287 transitions. Word has length 31 [2022-10-16 04:36:44,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:44,365 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 287 transitions. [2022-10-16 04:36:44,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:44,365 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 287 transitions. [2022-10-16 04:36:44,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-10-16 04:36:44,366 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:44,366 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:44,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-10-16 04:36:44,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-10-16 04:36:44,573 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:44,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:44,574 INFO L85 PathProgramCache]: Analyzing trace with hash 275503550, now seen corresponding path program 3 times [2022-10-16 04:36:44,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:44,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985608031] [2022-10-16 04:36:44,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:44,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:45,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:45,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985608031] [2022-10-16 04:36:45,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985608031] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:36:45,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298141966] [2022-10-16 04:36:45,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 04:36:45,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:45,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:36:45,003 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:36:45,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-10-16 04:36:45,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-10-16 04:36:45,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:36:45,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 38 conjunts are in the unsatisfiable core [2022-10-16 04:36:45,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:36:45,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:36:45,574 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:36:45,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:36:45,602 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:45,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:36:45,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:36:45,845 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 20 treesize of output 16 [2022-10-16 04:36:46,033 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:46,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298141966] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:36:46,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:36:46,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-10-16 04:36:46,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437731210] [2022-10-16 04:36:46,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:36:46,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-10-16 04:36:46,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:46,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-10-16 04:36:46,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2022-10-16 04:36:46,036 INFO L87 Difference]: Start difference. First operand 221 states and 287 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:47,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:47,575 INFO L93 Difference]: Finished difference Result 504 states and 655 transitions. [2022-10-16 04:36:47,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-10-16 04:36:47,575 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-10-16 04:36:47,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:47,578 INFO L225 Difference]: With dead ends: 504 [2022-10-16 04:36:47,578 INFO L226 Difference]: Without dead ends: 504 [2022-10-16 04:36:47,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=273, Invalid=1889, Unknown=0, NotChecked=0, Total=2162 [2022-10-16 04:36:47,579 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 1689 mSDsluCounter, 3082 mSDsCounter, 0 mSdLazyCounter, 1440 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1689 SdHoareTripleChecker+Valid, 3278 SdHoareTripleChecker+Invalid, 1914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 320 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:47,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1689 Valid, 3278 Invalid, 1914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1440 Invalid, 0 Unknown, 320 Unchecked, 1.0s Time] [2022-10-16 04:36:47,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-10-16 04:36:47,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 223. [2022-10-16 04:36:47,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.3256880733944953) internal successors, (289), 222 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:47,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 289 transitions. [2022-10-16 04:36:47,587 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 289 transitions. Word has length 31 [2022-10-16 04:36:47,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:47,587 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 289 transitions. [2022-10-16 04:36:47,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:47,587 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 289 transitions. [2022-10-16 04:36:47,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-10-16 04:36:47,588 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:47,588 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:47,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-10-16 04:36:47,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:47,802 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:47,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:47,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1537258681, now seen corresponding path program 7 times [2022-10-16 04:36:47,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:47,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174928053] [2022-10-16 04:36:47,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:47,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:47,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:48,258 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:48,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:48,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174928053] [2022-10-16 04:36:48,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174928053] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:36:48,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061267216] [2022-10-16 04:36:48,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-10-16 04:36:48,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:48,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:36:48,260 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:36:48,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-10-16 04:36:48,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:48,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 40 conjunts are in the unsatisfiable core [2022-10-16 04:36:48,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:36:48,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:36:48,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-16 04:36:48,627 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-16 04:36:48,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-16 04:36:48,744 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:48,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:36:49,113 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 27 treesize of output 23 [2022-10-16 04:36:49,489 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:36:49,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-10-16 04:36:49,508 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:49,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061267216] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:36:49,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:36:49,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 34 [2022-10-16 04:36:49,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683905774] [2022-10-16 04:36:49,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:36:49,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-10-16 04:36:49,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:49,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-10-16 04:36:49,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2022-10-16 04:36:49,512 INFO L87 Difference]: Start difference. First operand 223 states and 289 transitions. Second operand has 35 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:51,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:51,635 INFO L93 Difference]: Finished difference Result 624 states and 810 transitions. [2022-10-16 04:36:51,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-10-16 04:36:51,635 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 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 31 [2022-10-16 04:36:51,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:51,637 INFO L225 Difference]: With dead ends: 624 [2022-10-16 04:36:51,637 INFO L226 Difference]: Without dead ends: 624 [2022-10-16 04:36:51,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=527, Invalid=1923, Unknown=0, NotChecked=0, Total=2450 [2022-10-16 04:36:51,639 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 1197 mSDsluCounter, 2951 mSDsCounter, 0 mSdLazyCounter, 1927 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1197 SdHoareTripleChecker+Valid, 3213 SdHoareTripleChecker+Invalid, 2192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:51,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1197 Valid, 3213 Invalid, 2192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1927 Invalid, 0 Unknown, 144 Unchecked, 1.4s Time] [2022-10-16 04:36:51,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-10-16 04:36:51,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 257. [2022-10-16 04:36:51,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.3293650793650793) internal successors, (335), 256 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:51,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 335 transitions. [2022-10-16 04:36:51,646 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 335 transitions. Word has length 31 [2022-10-16 04:36:51,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:51,647 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 335 transitions. [2022-10-16 04:36:51,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:51,647 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 335 transitions. [2022-10-16 04:36:51,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-10-16 04:36:51,648 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:51,648 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:51,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-10-16 04:36:51,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:51,853 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:51,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:51,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1360028105, now seen corresponding path program 2 times [2022-10-16 04:36:51,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:51,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050744423] [2022-10-16 04:36:51,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:51,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:52,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:52,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050744423] [2022-10-16 04:36:52,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050744423] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:36:52,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109300336] [2022-10-16 04:36:52,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 04:36:52,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:52,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:36:52,308 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:36:52,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-10-16 04:36:52,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 04:36:52,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:36:52,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 41 conjunts are in the unsatisfiable core [2022-10-16 04:36:52,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:36:52,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:36:52,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-16 04:36:52,737 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:52,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:36:52,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-10-16 04:36:52,941 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 12 treesize of output 8 [2022-10-16 04:36:53,145 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:53,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109300336] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:36:53,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:36:53,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-10-16 04:36:53,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930754011] [2022-10-16 04:36:53,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:36:53,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-10-16 04:36:53,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:53,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-10-16 04:36:53,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-10-16 04:36:53,148 INFO L87 Difference]: Start difference. First operand 257 states and 335 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:54,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:54,835 INFO L93 Difference]: Finished difference Result 499 states and 649 transitions. [2022-10-16 04:36:54,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-10-16 04:36:54,836 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 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 32 [2022-10-16 04:36:54,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:54,837 INFO L225 Difference]: With dead ends: 499 [2022-10-16 04:36:54,837 INFO L226 Difference]: Without dead ends: 499 [2022-10-16 04:36:54,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=322, Invalid=1934, Unknown=0, NotChecked=0, Total=2256 [2022-10-16 04:36:54,838 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 1443 mSDsluCounter, 2454 mSDsCounter, 0 mSdLazyCounter, 1573 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1443 SdHoareTripleChecker+Valid, 2618 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:54,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1443 Valid, 2618 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1573 Invalid, 0 Unknown, 49 Unchecked, 1.1s Time] [2022-10-16 04:36:54,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-10-16 04:36:54,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 265. [2022-10-16 04:36:54,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.3346153846153845) internal successors, (347), 264 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:54,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 347 transitions. [2022-10-16 04:36:54,846 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 347 transitions. Word has length 32 [2022-10-16 04:36:54,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:54,846 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 347 transitions. [2022-10-16 04:36:54,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:54,846 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 347 transitions. [2022-10-16 04:36:54,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-10-16 04:36:54,847 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:54,847 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:54,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-10-16 04:36:55,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:55,061 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:55,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:55,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1735343946, now seen corresponding path program 1 times [2022-10-16 04:36:55,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:55,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130592680] [2022-10-16 04:36:55,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:55,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:55,079 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-16 04:36:55,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [306957401] [2022-10-16 04:36:55,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:55,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:55,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:36:55,080 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:36:55,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-10-16 04:36:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:55,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 34 conjunts are in the unsatisfiable core [2022-10-16 04:36:55,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:36:55,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:36:55,423 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:36:55,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:36:55,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:55,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:36:55,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:36:55,567 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 16 treesize of output 12 [2022-10-16 04:36:55,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:55,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:55,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130592680] [2022-10-16 04:36:55,692 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-16 04:36:55,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306957401] [2022-10-16 04:36:55,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306957401] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:36:55,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:36:55,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2022-10-16 04:36:55,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641206549] [2022-10-16 04:36:55,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:36:55,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-16 04:36:55,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:55,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-16 04:36:55,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-10-16 04:36:55,694 INFO L87 Difference]: Start difference. First operand 265 states and 347 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:56,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:56,149 INFO L93 Difference]: Finished difference Result 313 states and 406 transitions. [2022-10-16 04:36:56,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-16 04:36:56,150 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-10-16 04:36:56,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:56,151 INFO L225 Difference]: With dead ends: 313 [2022-10-16 04:36:56,151 INFO L226 Difference]: Without dead ends: 224 [2022-10-16 04:36:56,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-10-16 04:36:56,152 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 102 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:56,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 759 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 390 Invalid, 0 Unknown, 95 Unchecked, 0.3s Time] [2022-10-16 04:36:56,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-10-16 04:36:56,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-10-16 04:36:56,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.3378995433789955) internal successors, (293), 223 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:56,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 293 transitions. [2022-10-16 04:36:56,158 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 293 transitions. Word has length 33 [2022-10-16 04:36:56,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:56,158 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 293 transitions. [2022-10-16 04:36:56,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:56,159 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 293 transitions. [2022-10-16 04:36:56,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-10-16 04:36:56,159 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:56,159 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:56,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-10-16 04:36:56,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-10-16 04:36:56,373 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:56,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:56,374 INFO L85 PathProgramCache]: Analyzing trace with hash 971284045, now seen corresponding path program 2 times [2022-10-16 04:36:56,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:56,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141658297] [2022-10-16 04:36:56,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:56,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:56,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:56,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141658297] [2022-10-16 04:36:56,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141658297] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:36:56,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986608477] [2022-10-16 04:36:56,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 04:36:56,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:56,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:36:56,807 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:36:56,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-10-16 04:36:56,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 04:36:56,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:36:56,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 38 conjunts are in the unsatisfiable core [2022-10-16 04:36:56,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:36:57,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:36:57,410 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:36:57,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:36:57,440 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:57,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:36:57,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:36:57,693 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 20 treesize of output 16 [2022-10-16 04:36:57,909 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:57,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986608477] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:36:57,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:36:57,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-10-16 04:36:57,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626440075] [2022-10-16 04:36:57,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:36:57,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-10-16 04:36:57,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:36:57,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-10-16 04:36:57,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2022-10-16 04:36:57,912 INFO L87 Difference]: Start difference. First operand 224 states and 293 transitions. Second operand has 34 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 34 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:58,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:36:58,790 INFO L93 Difference]: Finished difference Result 361 states and 471 transitions. [2022-10-16 04:36:58,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-16 04:36:58,791 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 34 states have internal predecessors, (84), 0 states have call successors, (0), 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 33 [2022-10-16 04:36:58,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:36:58,792 INFO L225 Difference]: With dead ends: 361 [2022-10-16 04:36:58,792 INFO L226 Difference]: Without dead ends: 361 [2022-10-16 04:36:58,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=223, Invalid=1669, Unknown=0, NotChecked=0, Total=1892 [2022-10-16 04:36:58,793 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 1206 mSDsluCounter, 1152 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1206 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-16 04:36:58,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1206 Valid, 1230 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 638 Invalid, 0 Unknown, 184 Unchecked, 0.5s Time] [2022-10-16 04:36:58,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-10-16 04:36:58,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 230. [2022-10-16 04:36:58,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 225 states have (on average 1.3377777777777777) internal successors, (301), 229 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:58,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 301 transitions. [2022-10-16 04:36:58,800 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 301 transitions. Word has length 33 [2022-10-16 04:36:58,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:36:58,800 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 301 transitions. [2022-10-16 04:36:58,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 34 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:36:58,800 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 301 transitions. [2022-10-16 04:36:58,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-10-16 04:36:58,801 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:36:58,801 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:36:58,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-10-16 04:36:59,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:59,014 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:36:59,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:36:59,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1480326441, now seen corresponding path program 3 times [2022-10-16 04:36:59,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:36:59,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702134263] [2022-10-16 04:36:59,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:36:59,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:36:59,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:36:59,440 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:36:59,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:36:59,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702134263] [2022-10-16 04:36:59,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702134263] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:36:59,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734969301] [2022-10-16 04:36:59,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 04:36:59,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:36:59,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:36:59,444 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:36:59,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-10-16 04:36:59,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-10-16 04:36:59,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:36:59,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 38 conjunts are in the unsatisfiable core [2022-10-16 04:36:59,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:36:59,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:37:00,088 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:37:00,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:37:00,118 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:00,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:37:00,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:37:00,365 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 20 treesize of output 16 [2022-10-16 04:37:00,593 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:00,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734969301] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:37:00,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:37:00,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-10-16 04:37:00,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192414605] [2022-10-16 04:37:00,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:37:00,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-10-16 04:37:00,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:37:00,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-10-16 04:37:00,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2022-10-16 04:37:00,596 INFO L87 Difference]: Start difference. First operand 230 states and 301 transitions. Second operand has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 34 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:01,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:37:01,900 INFO L93 Difference]: Finished difference Result 373 states and 487 transitions. [2022-10-16 04:37:01,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-16 04:37:01,901 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 34 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-10-16 04:37:01,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:37:01,903 INFO L225 Difference]: With dead ends: 373 [2022-10-16 04:37:01,903 INFO L226 Difference]: Without dead ends: 373 [2022-10-16 04:37:01,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=227, Invalid=1665, Unknown=0, NotChecked=0, Total=1892 [2022-10-16 04:37:01,904 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 719 mSDsluCounter, 2080 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 2204 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-10-16 04:37:01,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [719 Valid, 2204 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-10-16 04:37:01,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-10-16 04:37:01,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 230. [2022-10-16 04:37:01,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 225 states have (on average 1.3333333333333333) internal successors, (300), 229 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:01,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 300 transitions. [2022-10-16 04:37:01,909 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 300 transitions. Word has length 33 [2022-10-16 04:37:01,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:37:01,910 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 300 transitions. [2022-10-16 04:37:01,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 34 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:01,910 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 300 transitions. [2022-10-16 04:37:01,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-10-16 04:37:01,911 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:37:01,911 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:37:01,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-10-16 04:37:02,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:37:02,114 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:37:02,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:37:02,114 INFO L85 PathProgramCache]: Analyzing trace with hash 163156736, now seen corresponding path program 8 times [2022-10-16 04:37:02,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:37:02,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696231440] [2022-10-16 04:37:02,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:37:02,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:37:02,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:37:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:02,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:37:02,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696231440] [2022-10-16 04:37:02,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696231440] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:37:02,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324093887] [2022-10-16 04:37:02,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 04:37:02,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:37:02,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:37:02,599 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:37:02,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-10-16 04:37:02,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 04:37:02,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:37:02,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 44 conjunts are in the unsatisfiable core [2022-10-16 04:37:02,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:37:02,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:37:03,299 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:37:03,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:37:03,329 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:03,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:37:03,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:37:03,651 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 20 treesize of output 16 [2022-10-16 04:37:03,907 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:03,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324093887] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:37:03,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:37:03,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 39 [2022-10-16 04:37:03,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594946814] [2022-10-16 04:37:03,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:37:03,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-10-16 04:37:03,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:37:03,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-10-16 04:37:03,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1365, Unknown=0, NotChecked=0, Total=1482 [2022-10-16 04:37:03,910 INFO L87 Difference]: Start difference. First operand 230 states and 300 transitions. Second operand has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:05,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:37:05,854 INFO L93 Difference]: Finished difference Result 579 states and 760 transitions. [2022-10-16 04:37:05,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-10-16 04:37:05,855 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-10-16 04:37:05,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:37:05,858 INFO L225 Difference]: With dead ends: 579 [2022-10-16 04:37:05,858 INFO L226 Difference]: Without dead ends: 579 [2022-10-16 04:37:05,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=278, Invalid=2374, Unknown=0, NotChecked=0, Total=2652 [2022-10-16 04:37:05,859 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 1769 mSDsluCounter, 3273 mSDsCounter, 0 mSdLazyCounter, 1755 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1769 SdHoareTripleChecker+Valid, 3474 SdHoareTripleChecker+Invalid, 2148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-10-16 04:37:05,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1769 Valid, 3474 Invalid, 2148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1755 Invalid, 0 Unknown, 216 Unchecked, 1.3s Time] [2022-10-16 04:37:05,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-10-16 04:37:05,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 246. [2022-10-16 04:37:05,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 241 states have (on average 1.3319502074688796) internal successors, (321), 245 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:05,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 321 transitions. [2022-10-16 04:37:05,867 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 321 transitions. Word has length 33 [2022-10-16 04:37:05,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:37:05,867 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 321 transitions. [2022-10-16 04:37:05,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:05,867 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 321 transitions. [2022-10-16 04:37:05,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-10-16 04:37:05,868 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:37:05,868 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:37:05,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-10-16 04:37:06,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-10-16 04:37:06,083 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:37:06,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:37:06,084 INFO L85 PathProgramCache]: Analyzing trace with hash -70918275, now seen corresponding path program 1 times [2022-10-16 04:37:06,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:37:06,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937004443] [2022-10-16 04:37:06,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:37:06,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:37:06,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:37:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:06,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:37:06,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937004443] [2022-10-16 04:37:06,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937004443] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:37:06,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689011587] [2022-10-16 04:37:06,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:37:06,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:37:06,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:37:06,526 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:37:06,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-10-16 04:37:06,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:37:06,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 37 conjunts are in the unsatisfiable core [2022-10-16 04:37:06,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:37:06,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:37:07,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-16 04:37:07,074 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:07,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:37:07,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-10-16 04:37:07,345 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 16 treesize of output 12 [2022-10-16 04:37:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:07,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689011587] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:37:07,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:37:07,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 36 [2022-10-16 04:37:07,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015623560] [2022-10-16 04:37:07,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:37:07,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-10-16 04:37:07,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:37:07,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-10-16 04:37:07,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2022-10-16 04:37:07,861 INFO L87 Difference]: Start difference. First operand 246 states and 321 transitions. Second operand has 36 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 36 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:09,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:37:09,061 INFO L93 Difference]: Finished difference Result 375 states and 490 transitions. [2022-10-16 04:37:09,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-10-16 04:37:09,062 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 36 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-10-16 04:37:09,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:37:09,065 INFO L225 Difference]: With dead ends: 375 [2022-10-16 04:37:09,065 INFO L226 Difference]: Without dead ends: 375 [2022-10-16 04:37:09,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=287, Invalid=2065, Unknown=0, NotChecked=0, Total=2352 [2022-10-16 04:37:09,066 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 767 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 1599 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-16 04:37:09,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [767 Valid, 1599 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 977 Invalid, 0 Unknown, 87 Unchecked, 0.7s Time] [2022-10-16 04:37:09,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-10-16 04:37:09,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 262. [2022-10-16 04:37:09,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 257 states have (on average 1.3346303501945525) internal successors, (343), 261 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:09,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 343 transitions. [2022-10-16 04:37:09,079 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 343 transitions. Word has length 34 [2022-10-16 04:37:09,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:37:09,079 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 343 transitions. [2022-10-16 04:37:09,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 36 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:09,080 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 343 transitions. [2022-10-16 04:37:09,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-10-16 04:37:09,080 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:37:09,081 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:37:09,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-10-16 04:37:09,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-10-16 04:37:09,294 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:37:09,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:37:09,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1987502810, now seen corresponding path program 1 times [2022-10-16 04:37:09,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:37:09,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295329647] [2022-10-16 04:37:09,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:37:09,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:37:09,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:37:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:10,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:37:10,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295329647] [2022-10-16 04:37:10,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295329647] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:37:10,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583511691] [2022-10-16 04:37:10,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:37:10,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:37:10,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:37:10,071 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:37:10,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-10-16 04:37:10,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:37:10,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 38 conjunts are in the unsatisfiable core [2022-10-16 04:37:10,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:37:10,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:37:11,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:37:11,098 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:37:11,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:37:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:11,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:37:11,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:37:11,581 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 28 treesize of output 24 [2022-10-16 04:37:12,234 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:12,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583511691] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:37:12,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:37:12,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 40 [2022-10-16 04:37:12,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236965551] [2022-10-16 04:37:12,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:37:12,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-10-16 04:37:12,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:37:12,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-10-16 04:37:12,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1451, Unknown=0, NotChecked=0, Total=1560 [2022-10-16 04:37:12,236 INFO L87 Difference]: Start difference. First operand 262 states and 343 transitions. Second operand has 40 states, 40 states have (on average 2.5) internal successors, (100), 40 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:13,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:37:13,962 INFO L93 Difference]: Finished difference Result 358 states and 464 transitions. [2022-10-16 04:37:13,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-10-16 04:37:13,962 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.5) internal successors, (100), 40 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-10-16 04:37:13,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:37:13,965 INFO L225 Difference]: With dead ends: 358 [2022-10-16 04:37:13,965 INFO L226 Difference]: Without dead ends: 358 [2022-10-16 04:37:13,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=237, Invalid=2843, Unknown=0, NotChecked=0, Total=3080 [2022-10-16 04:37:13,966 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 122 mSDsluCounter, 2044 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 2132 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 282 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-16 04:37:13,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 2132 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 617 Invalid, 0 Unknown, 282 Unchecked, 0.5s Time] [2022-10-16 04:37:13,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-10-16 04:37:13,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 262. [2022-10-16 04:37:13,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 257 states have (on average 1.3346303501945525) internal successors, (343), 261 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:13,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 343 transitions. [2022-10-16 04:37:13,975 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 343 transitions. Word has length 35 [2022-10-16 04:37:13,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:37:13,976 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 343 transitions. [2022-10-16 04:37:13,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.5) internal successors, (100), 40 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:13,976 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 343 transitions. [2022-10-16 04:37:13,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-10-16 04:37:13,977 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:37:13,977 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:37:14,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-10-16 04:37:14,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-10-16 04:37:14,192 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:37:14,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:37:14,193 INFO L85 PathProgramCache]: Analyzing trace with hash 568641122, now seen corresponding path program 1 times [2022-10-16 04:37:14,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:37:14,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288559822] [2022-10-16 04:37:14,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:37:14,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:37:14,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:37:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:14,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:37:14,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288559822] [2022-10-16 04:37:14,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288559822] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:37:14,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132346826] [2022-10-16 04:37:14,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:37:14,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:37:14,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:37:14,605 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:37:14,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-10-16 04:37:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:37:14,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 37 conjunts are in the unsatisfiable core [2022-10-16 04:37:14,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:37:14,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:37:15,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-10-16 04:37:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:15,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:37:15,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-10-16 04:37:15,266 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 12 treesize of output 8 [2022-10-16 04:37:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:15,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132346826] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:37:15,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:37:15,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-10-16 04:37:15,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609920151] [2022-10-16 04:37:15,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:37:15,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-10-16 04:37:15,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:37:15,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-10-16 04:37:15,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2022-10-16 04:37:15,492 INFO L87 Difference]: Start difference. First operand 262 states and 343 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:16,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:37:16,717 INFO L93 Difference]: Finished difference Result 400 states and 520 transitions. [2022-10-16 04:37:16,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-10-16 04:37:16,718 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-10-16 04:37:16,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:37:16,720 INFO L225 Difference]: With dead ends: 400 [2022-10-16 04:37:16,721 INFO L226 Difference]: Without dead ends: 400 [2022-10-16 04:37:16,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=303, Invalid=1767, Unknown=0, NotChecked=0, Total=2070 [2022-10-16 04:37:16,721 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 1246 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1246 SdHoareTripleChecker+Valid, 1328 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-16 04:37:16,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1246 Valid, 1328 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 724 Invalid, 0 Unknown, 109 Unchecked, 0.6s Time] [2022-10-16 04:37:16,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-10-16 04:37:16,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 265. [2022-10-16 04:37:16,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.3307692307692307) internal successors, (346), 264 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:16,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 346 transitions. [2022-10-16 04:37:16,728 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 346 transitions. Word has length 36 [2022-10-16 04:37:16,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:37:16,728 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 346 transitions. [2022-10-16 04:37:16,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:16,729 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 346 transitions. [2022-10-16 04:37:16,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-16 04:37:16,729 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:37:16,730 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:37:16,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-10-16 04:37:16,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:37:16,945 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:37:16,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:37:16,946 INFO L85 PathProgramCache]: Analyzing trace with hash 678390365, now seen corresponding path program 1 times [2022-10-16 04:37:16,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:37:16,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151121481] [2022-10-16 04:37:16,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:37:16,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:37:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:37:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:17,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:37:17,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151121481] [2022-10-16 04:37:17,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151121481] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:37:17,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976043522] [2022-10-16 04:37:17,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:37:17,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:37:17,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:37:17,833 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:37:17,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-10-16 04:37:17,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:37:17,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 38 conjunts are in the unsatisfiable core [2022-10-16 04:37:17,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:37:18,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:37:18,592 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:37:18,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:37:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:18,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:37:18,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:37:18,942 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 20 treesize of output 16 [2022-10-16 04:37:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:19,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976043522] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:37:19,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:37:19,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 34 [2022-10-16 04:37:19,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295710170] [2022-10-16 04:37:19,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:37:19,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-10-16 04:37:19,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:37:19,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-10-16 04:37:19,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1035, Unknown=0, NotChecked=0, Total=1122 [2022-10-16 04:37:19,192 INFO L87 Difference]: Start difference. First operand 265 states and 346 transitions. Second operand has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 34 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:20,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:37:20,820 INFO L93 Difference]: Finished difference Result 365 states and 473 transitions. [2022-10-16 04:37:20,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-10-16 04:37:20,821 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 34 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-10-16 04:37:20,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:37:20,823 INFO L225 Difference]: With dead ends: 365 [2022-10-16 04:37:20,823 INFO L226 Difference]: Without dead ends: 365 [2022-10-16 04:37:20,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=222, Invalid=2430, Unknown=0, NotChecked=0, Total=2652 [2022-10-16 04:37:20,824 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 170 mSDsluCounter, 2307 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 2413 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 358 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-16 04:37:20,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 2413 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 677 Invalid, 0 Unknown, 358 Unchecked, 0.5s Time] [2022-10-16 04:37:20,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-10-16 04:37:20,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 263. [2022-10-16 04:37:20,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.3294573643410852) internal successors, (343), 262 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:20,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 343 transitions. [2022-10-16 04:37:20,829 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 343 transitions. Word has length 37 [2022-10-16 04:37:20,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:37:20,829 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 343 transitions. [2022-10-16 04:37:20,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 34 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:20,829 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 343 transitions. [2022-10-16 04:37:20,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-16 04:37:20,830 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:37:20,830 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:37:20,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-10-16 04:37:21,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:37:21,032 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:37:21,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:37:21,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1713084294, now seen corresponding path program 4 times [2022-10-16 04:37:21,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:37:21,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476025119] [2022-10-16 04:37:21,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:37:21,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:37:21,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:37:21,535 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:21,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:37:21,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476025119] [2022-10-16 04:37:21,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476025119] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:37:21,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705068586] [2022-10-16 04:37:21,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-16 04:37:21,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:37:21,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:37:21,537 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:37:21,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-10-16 04:37:21,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-16 04:37:21,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:37:21,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 44 conjunts are in the unsatisfiable core [2022-10-16 04:37:21,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:37:21,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:37:22,367 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:37:22,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:37:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:22,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:37:22,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:37:22,739 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 20 treesize of output 16 [2022-10-16 04:37:23,014 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:23,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705068586] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:37:23,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:37:23,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 39 [2022-10-16 04:37:23,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664365035] [2022-10-16 04:37:23,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:37:23,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-10-16 04:37:23,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:37:23,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-10-16 04:37:23,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1365, Unknown=0, NotChecked=0, Total=1482 [2022-10-16 04:37:23,017 INFO L87 Difference]: Start difference. First operand 263 states and 343 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 39 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:24,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:37:24,994 INFO L93 Difference]: Finished difference Result 627 states and 820 transitions. [2022-10-16 04:37:24,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-10-16 04:37:24,995 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 39 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-10-16 04:37:24,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:37:24,998 INFO L225 Difference]: With dead ends: 627 [2022-10-16 04:37:24,998 INFO L226 Difference]: Without dead ends: 627 [2022-10-16 04:37:24,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=262, Invalid=2288, Unknown=0, NotChecked=0, Total=2550 [2022-10-16 04:37:24,998 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 720 mSDsluCounter, 4880 mSDsCounter, 0 mSdLazyCounter, 1857 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 5109 SdHoareTripleChecker+Invalid, 2326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 398 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-10-16 04:37:24,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [720 Valid, 5109 Invalid, 2326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1857 Invalid, 0 Unknown, 398 Unchecked, 1.3s Time] [2022-10-16 04:37:24,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-10-16 04:37:25,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 265. [2022-10-16 04:37:25,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.3269230769230769) internal successors, (345), 264 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:25,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 345 transitions. [2022-10-16 04:37:25,004 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 345 transitions. Word has length 37 [2022-10-16 04:37:25,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:37:25,005 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 345 transitions. [2022-10-16 04:37:25,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 39 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:25,005 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 345 transitions. [2022-10-16 04:37:25,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-16 04:37:25,006 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:37:25,006 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:37:25,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-10-16 04:37:25,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-10-16 04:37:25,220 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:37:25,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:37:25,221 INFO L85 PathProgramCache]: Analyzing trace with hash -2002810429, now seen corresponding path program 9 times [2022-10-16 04:37:25,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:37:25,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38340030] [2022-10-16 04:37:25,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:37:25,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:37:25,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:37:25,947 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:25,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:37:25,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38340030] [2022-10-16 04:37:25,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38340030] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:37:25,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755605591] [2022-10-16 04:37:25,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 04:37:25,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:37:25,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:37:25,954 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:37:25,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-10-16 04:37:26,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-10-16 04:37:26,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:37:26,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 45 conjunts are in the unsatisfiable core [2022-10-16 04:37:26,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:37:26,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:37:26,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-10-16 04:37:26,484 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-16 04:37:26,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-16 04:37:26,788 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:26,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:37:27,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:37:27,463 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 16 treesize of output 12 [2022-10-16 04:37:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 45 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:27,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755605591] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:37:27,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:37:27,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 41 [2022-10-16 04:37:27,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211997839] [2022-10-16 04:37:27,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:37:27,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-10-16 04:37:27,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:37:27,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-10-16 04:37:27,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1511, Unknown=0, NotChecked=0, Total=1722 [2022-10-16 04:37:27,997 INFO L87 Difference]: Start difference. First operand 265 states and 345 transitions. Second operand has 42 states, 41 states have (on average 2.6097560975609757) internal successors, (107), 42 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:31,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:37:31,255 INFO L93 Difference]: Finished difference Result 777 states and 1012 transitions. [2022-10-16 04:37:31,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-10-16 04:37:31,257 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.6097560975609757) internal successors, (107), 42 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-10-16 04:37:31,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:37:31,260 INFO L225 Difference]: With dead ends: 777 [2022-10-16 04:37:31,260 INFO L226 Difference]: Without dead ends: 777 [2022-10-16 04:37:31,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=825, Invalid=3081, Unknown=0, NotChecked=0, Total=3906 [2022-10-16 04:37:31,261 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 2133 mSDsluCounter, 2495 mSDsCounter, 0 mSdLazyCounter, 1635 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2133 SdHoareTripleChecker+Valid, 2782 SdHoareTripleChecker+Invalid, 1943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 1635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-10-16 04:37:31,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2133 Valid, 2782 Invalid, 1943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 1635 Invalid, 0 Unknown, 37 Unchecked, 1.6s Time] [2022-10-16 04:37:31,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-10-16 04:37:31,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 299. [2022-10-16 04:37:31,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.3299319727891157) internal successors, (391), 298 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:31,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 391 transitions. [2022-10-16 04:37:31,270 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 391 transitions. Word has length 37 [2022-10-16 04:37:31,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:37:31,270 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 391 transitions. [2022-10-16 04:37:31,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.6097560975609757) internal successors, (107), 42 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:31,270 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 391 transitions. [2022-10-16 04:37:31,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-10-16 04:37:31,271 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:37:31,272 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:37:31,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-10-16 04:37:31,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-10-16 04:37:31,486 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:37:31,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:37:31,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1418258171, now seen corresponding path program 3 times [2022-10-16 04:37:31,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:37:31,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266315095] [2022-10-16 04:37:31,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:37:31,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:37:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:37:32,009 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:32,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:37:32,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266315095] [2022-10-16 04:37:32,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266315095] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:37:32,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337728947] [2022-10-16 04:37:32,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 04:37:32,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:37:32,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:37:32,011 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:37:32,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-10-16 04:37:32,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-10-16 04:37:32,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:37:32,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 37 conjunts are in the unsatisfiable core [2022-10-16 04:37:32,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:37:32,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 04:37:32,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:37:32,434 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-16 04:37:32,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-16 04:37:32,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-10-16 04:37:32,675 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:37:32,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-10-16 04:37:32,992 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-10-16 04:37:32,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 04:37:32,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337728947] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:37:32,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 04:37:32,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [17] total 23 [2022-10-16 04:37:32,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666933765] [2022-10-16 04:37:32,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:37:32,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 04:37:32,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:37:32,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 04:37:32,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=460, Unknown=0, NotChecked=0, Total=506 [2022-10-16 04:37:32,994 INFO L87 Difference]: Start difference. First operand 299 states and 391 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:33,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:37:33,217 INFO L93 Difference]: Finished difference Result 408 states and 533 transitions. [2022-10-16 04:37:33,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 04:37:33,218 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-10-16 04:37:33,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:37:33,220 INFO L225 Difference]: With dead ends: 408 [2022-10-16 04:37:33,220 INFO L226 Difference]: Without dead ends: 408 [2022-10-16 04:37:33,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=55, Invalid=545, Unknown=0, NotChecked=0, Total=600 [2022-10-16 04:37:33,221 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 15 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:37:33,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 224 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 70 Unchecked, 0.1s Time] [2022-10-16 04:37:33,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-10-16 04:37:33,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 307. [2022-10-16 04:37:33,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 302 states have (on average 1.3344370860927153) internal successors, (403), 306 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:33,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 403 transitions. [2022-10-16 04:37:33,227 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 403 transitions. Word has length 38 [2022-10-16 04:37:33,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:37:33,227 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 403 transitions. [2022-10-16 04:37:33,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:33,227 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 403 transitions. [2022-10-16 04:37:33,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-10-16 04:37:33,228 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:37:33,228 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:37:33,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-10-16 04:37:33,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-10-16 04:37:33,435 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:37:33,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:37:33,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1868510397, now seen corresponding path program 1 times [2022-10-16 04:37:33,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:37:33,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917503078] [2022-10-16 04:37:33,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:37:33,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:37:33,451 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-16 04:37:33,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044908672] [2022-10-16 04:37:33,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:37:33,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:37:33,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:37:33,453 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:37:33,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-10-16 04:37:33,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:37:33,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 36 conjunts are in the unsatisfiable core [2022-10-16 04:37:33,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:37:33,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:37:34,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:37:34,136 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:37:34,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:37:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:34,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:37:34,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:37:34,399 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 24 treesize of output 20 [2022-10-16 04:37:34,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:34,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:37:34,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917503078] [2022-10-16 04:37:34,888 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-16 04:37:34,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044908672] [2022-10-16 04:37:34,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044908672] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:37:34,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:37:34,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2022-10-16 04:37:34,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904185817] [2022-10-16 04:37:34,888 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:37:34,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-16 04:37:34,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:37:34,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-16 04:37:34,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-10-16 04:37:34,890 INFO L87 Difference]: Start difference. First operand 307 states and 403 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:35,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:37:35,195 INFO L93 Difference]: Finished difference Result 328 states and 429 transitions. [2022-10-16 04:37:35,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-16 04:37:35,197 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 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 39 [2022-10-16 04:37:35,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:37:35,198 INFO L225 Difference]: With dead ends: 328 [2022-10-16 04:37:35,198 INFO L226 Difference]: Without dead ends: 326 [2022-10-16 04:37:35,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-10-16 04:37:35,199 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 27 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:37:35,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 790 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 173 Invalid, 0 Unknown, 76 Unchecked, 0.1s Time] [2022-10-16 04:37:35,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-10-16 04:37:35,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 318. [2022-10-16 04:37:35,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 313 states have (on average 1.3354632587859425) internal successors, (418), 317 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:35,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 418 transitions. [2022-10-16 04:37:35,204 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 418 transitions. Word has length 39 [2022-10-16 04:37:35,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:37:35,204 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 418 transitions. [2022-10-16 04:37:35,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:35,205 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 418 transitions. [2022-10-16 04:37:35,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-10-16 04:37:35,205 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:37:35,206 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:37:35,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-10-16 04:37:35,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:37:35,416 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:37:35,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:37:35,417 INFO L85 PathProgramCache]: Analyzing trace with hash 2085236550, now seen corresponding path program 2 times [2022-10-16 04:37:35,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:37:35,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566974155] [2022-10-16 04:37:35,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:37:35,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:37:35,436 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-16 04:37:35,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1913062743] [2022-10-16 04:37:35,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 04:37:35,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:37:35,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:37:35,438 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:37:35,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-10-16 04:37:35,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 04:37:35,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:37:35,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 40 conjunts are in the unsatisfiable core [2022-10-16 04:37:35,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:37:35,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:37:35,935 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:37:35,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:37:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:35,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:37:36,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:37:36,128 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 16 treesize of output 12 [2022-10-16 04:37:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:36,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:37:36,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566974155] [2022-10-16 04:37:36,302 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-16 04:37:36,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913062743] [2022-10-16 04:37:36,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913062743] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:37:36,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:37:36,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2022-10-16 04:37:36,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089048262] [2022-10-16 04:37:36,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:37:36,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-10-16 04:37:36,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:37:36,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-10-16 04:37:36,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-10-16 04:37:36,303 INFO L87 Difference]: Start difference. First operand 318 states and 418 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:36,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:37:36,840 INFO L93 Difference]: Finished difference Result 417 states and 544 transitions. [2022-10-16 04:37:36,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-16 04:37:36,840 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-10-16 04:37:36,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:37:36,843 INFO L225 Difference]: With dead ends: 417 [2022-10-16 04:37:36,843 INFO L226 Difference]: Without dead ends: 404 [2022-10-16 04:37:36,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-10-16 04:37:36,844 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 143 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 1370 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 342 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 04:37:36,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 1370 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 376 Invalid, 0 Unknown, 342 Unchecked, 0.3s Time] [2022-10-16 04:37:36,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-10-16 04:37:36,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 318. [2022-10-16 04:37:36,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 313 states have (on average 1.3322683706070289) internal successors, (417), 317 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:36,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 417 transitions. [2022-10-16 04:37:36,849 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 417 transitions. Word has length 39 [2022-10-16 04:37:36,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:37:36,849 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 417 transitions. [2022-10-16 04:37:36,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:36,850 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 417 transitions. [2022-10-16 04:37:36,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-10-16 04:37:36,851 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:37:36,851 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:37:36,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-10-16 04:37:37,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:37:37,064 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:37:37,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:37:37,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1198812681, now seen corresponding path program 3 times [2022-10-16 04:37:37,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:37:37,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415942425] [2022-10-16 04:37:37,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:37:37,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:37:37,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:37:37,560 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:37,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:37:37,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415942425] [2022-10-16 04:37:37,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415942425] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:37:37,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081866269] [2022-10-16 04:37:37,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 04:37:37,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:37:37,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:37:37,565 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:37:37,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-10-16 04:37:37,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-10-16 04:37:37,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:37:37,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 36 conjunts are in the unsatisfiable core [2022-10-16 04:37:37,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:37:37,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 04:37:37,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-10-16 04:37:37,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:37:37,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-10-16 04:37:37,886 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-16 04:37:37,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-16 04:37:37,968 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:37:37,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-10-16 04:37:38,149 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-10-16 04:37:38,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 04:37:38,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081866269] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:37:38,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 04:37:38,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [16] total 21 [2022-10-16 04:37:38,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659328522] [2022-10-16 04:37:38,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:37:38,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 04:37:38,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:37:38,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 04:37:38,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2022-10-16 04:37:38,151 INFO L87 Difference]: Start difference. First operand 318 states and 417 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:38,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:37:38,531 INFO L93 Difference]: Finished difference Result 410 states and 534 transitions. [2022-10-16 04:37:38,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 04:37:38,532 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-10-16 04:37:38,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:37:38,535 INFO L225 Difference]: With dead ends: 410 [2022-10-16 04:37:38,535 INFO L226 Difference]: Without dead ends: 410 [2022-10-16 04:37:38,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-10-16 04:37:38,535 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 140 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 04:37:38,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 117 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 04:37:38,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-10-16 04:37:38,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 318. [2022-10-16 04:37:38,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 313 states have (on average 1.3322683706070289) internal successors, (417), 317 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:38,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 417 transitions. [2022-10-16 04:37:38,542 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 417 transitions. Word has length 39 [2022-10-16 04:37:38,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:37:38,542 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 417 transitions. [2022-10-16 04:37:38,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:38,543 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 417 transitions. [2022-10-16 04:37:38,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-10-16 04:37:38,543 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:37:38,544 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:37:38,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-10-16 04:37:38,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-10-16 04:37:38,749 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:37:38,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:37:38,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1252797805, now seen corresponding path program 4 times [2022-10-16 04:37:38,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:37:38,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707265402] [2022-10-16 04:37:38,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:37:38,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:37:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:37:39,240 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:39,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:37:39,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707265402] [2022-10-16 04:37:39,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707265402] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:37:39,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371069217] [2022-10-16 04:37:39,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-16 04:37:39,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:37:39,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:37:39,244 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:37:39,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-10-16 04:37:39,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-16 04:37:39,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:37:39,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 44 conjunts are in the unsatisfiable core [2022-10-16 04:37:39,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:37:39,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:37:40,247 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:37:40,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:37:40,280 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:40,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:37:40,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:37:40,634 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 20 treesize of output 16 [2022-10-16 04:37:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:40,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371069217] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:37:40,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:37:40,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 39 [2022-10-16 04:37:40,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602285943] [2022-10-16 04:37:40,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:37:40,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-10-16 04:37:40,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:37:40,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-10-16 04:37:40,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1365, Unknown=0, NotChecked=0, Total=1482 [2022-10-16 04:37:40,938 INFO L87 Difference]: Start difference. First operand 318 states and 417 transitions. Second operand has 39 states, 39 states have (on average 2.41025641025641) internal successors, (94), 39 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:43,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:37:43,381 INFO L93 Difference]: Finished difference Result 646 states and 846 transitions. [2022-10-16 04:37:43,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-10-16 04:37:43,382 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.41025641025641) internal successors, (94), 39 states have internal predecessors, (94), 0 states have call successors, (0), 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 39 [2022-10-16 04:37:43,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:37:43,384 INFO L225 Difference]: With dead ends: 646 [2022-10-16 04:37:43,384 INFO L226 Difference]: Without dead ends: 646 [2022-10-16 04:37:43,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=308, Invalid=2554, Unknown=0, NotChecked=0, Total=2862 [2022-10-16 04:37:43,385 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 1675 mSDsluCounter, 4336 mSDsCounter, 0 mSdLazyCounter, 2196 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1675 SdHoareTripleChecker+Valid, 4573 SdHoareTripleChecker+Invalid, 2527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 2196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-10-16 04:37:43,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1675 Valid, 4573 Invalid, 2527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 2196 Invalid, 0 Unknown, 163 Unchecked, 1.6s Time] [2022-10-16 04:37:43,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-10-16 04:37:43,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 320. [2022-10-16 04:37:43,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.33015873015873) internal successors, (419), 319 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:43,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 419 transitions. [2022-10-16 04:37:43,392 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 419 transitions. Word has length 39 [2022-10-16 04:37:43,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:37:43,392 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 419 transitions. [2022-10-16 04:37:43,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.41025641025641) internal successors, (94), 39 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:43,392 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 419 transitions. [2022-10-16 04:37:43,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-10-16 04:37:43,393 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:37:43,393 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:37:43,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-10-16 04:37:43,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-10-16 04:37:43,608 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:37:43,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:37:43,609 INFO L85 PathProgramCache]: Analyzing trace with hash -555474308, now seen corresponding path program 10 times [2022-10-16 04:37:43,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:37:43,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671985402] [2022-10-16 04:37:43,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:37:43,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:37:43,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:37:44,201 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:44,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:37:44,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671985402] [2022-10-16 04:37:44,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671985402] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:37:44,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680735548] [2022-10-16 04:37:44,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-16 04:37:44,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:37:44,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:37:44,203 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:37:44,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-10-16 04:37:44,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-16 04:37:44,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:37:44,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 50 conjunts are in the unsatisfiable core [2022-10-16 04:37:44,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:37:44,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:37:45,207 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:37:45,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:37:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:45,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:37:45,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:37:45,712 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 20 treesize of output 16 [2022-10-16 04:37:46,093 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:46,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680735548] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:37:46,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:37:46,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-10-16 04:37:46,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737638117] [2022-10-16 04:37:46,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:37:46,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-10-16 04:37:46,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:37:46,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-10-16 04:37:46,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1761, Unknown=0, NotChecked=0, Total=1892 [2022-10-16 04:37:46,095 INFO L87 Difference]: Start difference. First operand 320 states and 419 transitions. Second operand has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 44 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:49,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:37:49,435 INFO L93 Difference]: Finished difference Result 897 states and 1181 transitions. [2022-10-16 04:37:49,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-10-16 04:37:49,440 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 44 states have internal predecessors, (94), 0 states have call successors, (0), 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 39 [2022-10-16 04:37:49,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:37:49,444 INFO L225 Difference]: With dead ends: 897 [2022-10-16 04:37:49,444 INFO L226 Difference]: Without dead ends: 897 [2022-10-16 04:37:49,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=358, Invalid=3424, Unknown=0, NotChecked=0, Total=3782 [2022-10-16 04:37:49,445 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 2406 mSDsluCounter, 5560 mSDsCounter, 0 mSdLazyCounter, 2639 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2406 SdHoareTripleChecker+Valid, 5873 SdHoareTripleChecker+Invalid, 3123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 2639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:37:49,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2406 Valid, 5873 Invalid, 3123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 2639 Invalid, 0 Unknown, 261 Unchecked, 2.1s Time] [2022-10-16 04:37:49,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-10-16 04:37:49,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 338. [2022-10-16 04:37:49,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 333 states have (on average 1.3303303303303304) internal successors, (443), 337 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:49,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 443 transitions. [2022-10-16 04:37:49,454 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 443 transitions. Word has length 39 [2022-10-16 04:37:49,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:37:49,454 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 443 transitions. [2022-10-16 04:37:49,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 44 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:49,454 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 443 transitions. [2022-10-16 04:37:49,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-10-16 04:37:49,455 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:37:49,455 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:37:49,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-10-16 04:37:49,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-10-16 04:37:49,671 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:37:49,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:37:49,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1044087797, now seen corresponding path program 1 times [2022-10-16 04:37:49,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:37:49,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995281328] [2022-10-16 04:37:49,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:37:49,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:37:49,688 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-16 04:37:49,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169063] [2022-10-16 04:37:49,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:37:49,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:37:49,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:37:49,689 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:37:49,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-10-16 04:37:49,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:37:49,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 36 conjunts are in the unsatisfiable core [2022-10-16 04:37:49,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:37:49,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:37:50,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:37:50,413 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:37:50,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:37:50,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:50,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:37:50,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:37:50,682 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 24 treesize of output 20 [2022-10-16 04:37:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:51,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:37:51,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995281328] [2022-10-16 04:37:51,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-16 04:37:51,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169063] [2022-10-16 04:37:51,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169063] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:37:51,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:37:51,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2022-10-16 04:37:51,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127289695] [2022-10-16 04:37:51,180 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:37:51,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-16 04:37:51,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:37:51,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-16 04:37:51,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-10-16 04:37:51,181 INFO L87 Difference]: Start difference. First operand 338 states and 443 transitions. Second operand has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:51,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:37:51,512 INFO L93 Difference]: Finished difference Result 352 states and 460 transitions. [2022-10-16 04:37:51,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-16 04:37:51,513 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-10-16 04:37:51,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:37:51,515 INFO L225 Difference]: With dead ends: 352 [2022-10-16 04:37:51,515 INFO L226 Difference]: Without dead ends: 350 [2022-10-16 04:37:51,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-10-16 04:37:51,516 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 34 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 04:37:51,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 714 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 176 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2022-10-16 04:37:51,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-10-16 04:37:51,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 342. [2022-10-16 04:37:51,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 337 states have (on average 1.3323442136498516) internal successors, (449), 341 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:51,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 449 transitions. [2022-10-16 04:37:51,520 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 449 transitions. Word has length 40 [2022-10-16 04:37:51,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:37:51,520 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 449 transitions. [2022-10-16 04:37:51,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:51,521 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 449 transitions. [2022-10-16 04:37:51,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-10-16 04:37:51,522 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:37:51,522 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:37:51,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-10-16 04:37:51,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:37:51,736 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:37:51,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:37:51,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1607465151, now seen corresponding path program 2 times [2022-10-16 04:37:51,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:37:51,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417683231] [2022-10-16 04:37:51,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:37:51,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:37:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:37:52,227 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:52,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:37:52,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417683231] [2022-10-16 04:37:52,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417683231] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:37:52,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054351944] [2022-10-16 04:37:52,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 04:37:52,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:37:52,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:37:52,229 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:37:52,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-10-16 04:37:52,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 04:37:52,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:37:52,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 43 conjunts are in the unsatisfiable core [2022-10-16 04:37:52,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:37:52,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:37:52,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-10-16 04:37:52,802 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:52,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:37:53,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-10-16 04:37:53,067 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 12 treesize of output 8 [2022-10-16 04:37:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:53,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054351944] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:37:53,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:37:53,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2022-10-16 04:37:53,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009371520] [2022-10-16 04:37:53,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:37:53,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-10-16 04:37:53,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:37:53,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-10-16 04:37:53,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2022-10-16 04:37:53,364 INFO L87 Difference]: Start difference. First operand 342 states and 449 transitions. Second operand has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:55,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:37:55,448 INFO L93 Difference]: Finished difference Result 604 states and 793 transitions. [2022-10-16 04:37:55,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-10-16 04:37:55,449 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-10-16 04:37:55,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:37:55,452 INFO L225 Difference]: With dead ends: 604 [2022-10-16 04:37:55,452 INFO L226 Difference]: Without dead ends: 604 [2022-10-16 04:37:55,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=313, Invalid=2137, Unknown=0, NotChecked=0, Total=2450 [2022-10-16 04:37:55,453 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 1463 mSDsluCounter, 2685 mSDsCounter, 0 mSdLazyCounter, 1645 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1463 SdHoareTripleChecker+Valid, 2855 SdHoareTripleChecker+Invalid, 1879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-10-16 04:37:55,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1463 Valid, 2855 Invalid, 1879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1645 Invalid, 0 Unknown, 91 Unchecked, 1.3s Time] [2022-10-16 04:37:55,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-10-16 04:37:55,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 362. [2022-10-16 04:37:55,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 357 states have (on average 1.3361344537815125) internal successors, (477), 361 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:55,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 477 transitions. [2022-10-16 04:37:55,460 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 477 transitions. Word has length 40 [2022-10-16 04:37:55,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:37:55,461 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 477 transitions. [2022-10-16 04:37:55,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:37:55,461 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 477 transitions. [2022-10-16 04:37:55,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-10-16 04:37:55,462 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:37:55,462 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:37:55,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-10-16 04:37:55,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:37:55,675 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:37:55,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:37:55,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1580042242, now seen corresponding path program 1 times [2022-10-16 04:37:55,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:37:55,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906258679] [2022-10-16 04:37:55,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:37:55,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:37:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:37:56,224 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:56,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:37:56,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906258679] [2022-10-16 04:37:56,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906258679] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:37:56,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719481994] [2022-10-16 04:37:56,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:37:56,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:37:56,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:37:56,227 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:37:56,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-10-16 04:37:56,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:37:56,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 47 conjunts are in the unsatisfiable core [2022-10-16 04:37:56,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:37:56,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:37:57,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-16 04:37:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:57,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:37:57,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-10-16 04:37:57,456 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 16 treesize of output 12 [2022-10-16 04:37:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:37:58,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719481994] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:37:58,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:37:58,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-10-16 04:37:58,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472070669] [2022-10-16 04:37:58,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:37:58,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-10-16 04:37:58,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:37:58,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-10-16 04:37:58,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1838, Unknown=0, NotChecked=0, Total=1980 [2022-10-16 04:37:58,287 INFO L87 Difference]: Start difference. First operand 362 states and 477 transitions. Second operand has 45 states, 45 states have (on average 2.466666666666667) internal successors, (111), 45 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:00,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:38:00,966 INFO L93 Difference]: Finished difference Result 613 states and 803 transitions. [2022-10-16 04:38:00,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-10-16 04:38:00,968 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.466666666666667) internal successors, (111), 45 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-10-16 04:38:00,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:38:00,971 INFO L225 Difference]: With dead ends: 613 [2022-10-16 04:38:00,971 INFO L226 Difference]: Without dead ends: 613 [2022-10-16 04:38:00,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=424, Invalid=3608, Unknown=0, NotChecked=0, Total=4032 [2022-10-16 04:38:00,972 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 1664 mSDsluCounter, 3650 mSDsCounter, 0 mSdLazyCounter, 2326 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1664 SdHoareTripleChecker+Valid, 3843 SdHoareTripleChecker+Invalid, 2586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 2326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-10-16 04:38:00,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1664 Valid, 3843 Invalid, 2586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 2326 Invalid, 0 Unknown, 48 Unchecked, 1.7s Time] [2022-10-16 04:38:00,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-10-16 04:38:00,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 364. [2022-10-16 04:38:00,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 359 states have (on average 1.3370473537604457) internal successors, (480), 363 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:00,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 480 transitions. [2022-10-16 04:38:00,979 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 480 transitions. Word has length 40 [2022-10-16 04:38:00,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:38:00,979 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 480 transitions. [2022-10-16 04:38:00,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.466666666666667) internal successors, (111), 45 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:00,980 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 480 transitions. [2022-10-16 04:38:00,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-10-16 04:38:00,981 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:38:00,981 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:38:01,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-10-16 04:38:01,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:38:01,191 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:38:01,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:38:01,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1092187016, now seen corresponding path program 1 times [2022-10-16 04:38:01,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:38:01,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623231411] [2022-10-16 04:38:01,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:38:01,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:38:01,209 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-16 04:38:01,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1762816971] [2022-10-16 04:38:01,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:38:01,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:38:01,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:38:01,211 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:38:01,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-10-16 04:38:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:38:01,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 36 conjunts are in the unsatisfiable core [2022-10-16 04:38:01,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:38:01,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:38:01,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:38:01,953 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:38:01,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:38:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:38:01,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:38:02,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:38:02,234 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 24 treesize of output 20 [2022-10-16 04:38:02,784 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:38:02,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:38:02,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623231411] [2022-10-16 04:38:02,784 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-16 04:38:02,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762816971] [2022-10-16 04:38:02,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762816971] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:38:02,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:38:02,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2022-10-16 04:38:02,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607384440] [2022-10-16 04:38:02,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:38:02,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-16 04:38:02,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:38:02,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-16 04:38:02,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-10-16 04:38:02,786 INFO L87 Difference]: Start difference. First operand 364 states and 480 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:03,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:38:03,112 INFO L93 Difference]: Finished difference Result 377 states and 494 transitions. [2022-10-16 04:38:03,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-16 04:38:03,113 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-10-16 04:38:03,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:38:03,115 INFO L225 Difference]: With dead ends: 377 [2022-10-16 04:38:03,115 INFO L226 Difference]: Without dead ends: 375 [2022-10-16 04:38:03,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-10-16 04:38:03,116 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 32 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 04:38:03,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 595 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 165 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-10-16 04:38:03,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-10-16 04:38:03,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 369. [2022-10-16 04:38:03,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 364 states have (on average 1.335164835164835) internal successors, (486), 368 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:03,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 486 transitions. [2022-10-16 04:38:03,121 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 486 transitions. Word has length 41 [2022-10-16 04:38:03,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:38:03,121 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 486 transitions. [2022-10-16 04:38:03,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:03,121 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 486 transitions. [2022-10-16 04:38:03,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-10-16 04:38:03,122 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:38:03,122 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:38:03,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-10-16 04:38:03,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-10-16 04:38:03,335 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:38:03,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:38:03,335 INFO L85 PathProgramCache]: Analyzing trace with hash 781966550, now seen corresponding path program 1 times [2022-10-16 04:38:03,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:38:03,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727683355] [2022-10-16 04:38:03,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:38:03,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:38:03,353 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-16 04:38:03,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [552122850] [2022-10-16 04:38:03,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:38:03,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:38:03,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:38:03,354 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:38:03,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-10-16 04:38:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:38:03,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 36 conjunts are in the unsatisfiable core [2022-10-16 04:38:03,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:38:03,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:38:04,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:38:04,092 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:38:04,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:38:04,115 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:38:04,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:38:04,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:38:04,333 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 24 treesize of output 20 [2022-10-16 04:38:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:38:04,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:38:04,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727683355] [2022-10-16 04:38:04,894 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-16 04:38:04,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552122850] [2022-10-16 04:38:04,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552122850] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:38:04,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:38:04,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2022-10-16 04:38:04,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944359568] [2022-10-16 04:38:04,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:38:04,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-16 04:38:04,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:38:04,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-16 04:38:04,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-10-16 04:38:04,896 INFO L87 Difference]: Start difference. First operand 369 states and 486 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:05,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:38:05,322 INFO L93 Difference]: Finished difference Result 417 states and 548 transitions. [2022-10-16 04:38:05,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-16 04:38:05,324 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-10-16 04:38:05,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:38:05,326 INFO L225 Difference]: With dead ends: 417 [2022-10-16 04:38:05,326 INFO L226 Difference]: Without dead ends: 415 [2022-10-16 04:38:05,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2022-10-16 04:38:05,327 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 76 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 04:38:05,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 1195 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 205 Invalid, 0 Unknown, 224 Unchecked, 0.2s Time] [2022-10-16 04:38:05,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-10-16 04:38:05,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 376. [2022-10-16 04:38:05,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 371 states have (on average 1.3369272237196765) internal successors, (496), 375 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:05,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 496 transitions. [2022-10-16 04:38:05,334 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 496 transitions. Word has length 41 [2022-10-16 04:38:05,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:38:05,334 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 496 transitions. [2022-10-16 04:38:05,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:05,335 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 496 transitions. [2022-10-16 04:38:05,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-10-16 04:38:05,336 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:38:05,336 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:38:05,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-10-16 04:38:05,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-10-16 04:38:05,550 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:38:05,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:38:05,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1455397025, now seen corresponding path program 1 times [2022-10-16 04:38:05,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:38:05,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140316949] [2022-10-16 04:38:05,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:38:05,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:38:05,564 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-16 04:38:05,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1019084133] [2022-10-16 04:38:05,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:38:05,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:38:05,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:38:05,566 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:38:05,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-10-16 04:38:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:38:05,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 40 conjunts are in the unsatisfiable core [2022-10-16 04:38:05,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:38:05,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:38:06,067 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:38:06,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:38:06,086 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:38:06,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:38:06,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:38:06,286 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 16 treesize of output 12 [2022-10-16 04:38:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:38:06,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:38:06,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140316949] [2022-10-16 04:38:06,504 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-16 04:38:06,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019084133] [2022-10-16 04:38:06,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019084133] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:38:06,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:38:06,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2022-10-16 04:38:06,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738717991] [2022-10-16 04:38:06,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:38:06,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-10-16 04:38:06,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:38:06,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-10-16 04:38:06,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-10-16 04:38:06,506 INFO L87 Difference]: Start difference. First operand 376 states and 496 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:07,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:38:07,105 INFO L93 Difference]: Finished difference Result 473 states and 619 transitions. [2022-10-16 04:38:07,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-16 04:38:07,106 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 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 41 [2022-10-16 04:38:07,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:38:07,108 INFO L225 Difference]: With dead ends: 473 [2022-10-16 04:38:07,108 INFO L226 Difference]: Without dead ends: 460 [2022-10-16 04:38:07,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-10-16 04:38:07,109 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 141 mSDsluCounter, 1227 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1366 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 333 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-16 04:38:07,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 1366 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 376 Invalid, 0 Unknown, 333 Unchecked, 0.4s Time] [2022-10-16 04:38:07,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-10-16 04:38:07,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 376. [2022-10-16 04:38:07,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 371 states have (on average 1.3342318059299192) internal successors, (495), 375 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:07,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 495 transitions. [2022-10-16 04:38:07,115 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 495 transitions. Word has length 41 [2022-10-16 04:38:07,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:38:07,115 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 495 transitions. [2022-10-16 04:38:07,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:07,115 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 495 transitions. [2022-10-16 04:38:07,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-10-16 04:38:07,116 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:38:07,117 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:38:07,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-10-16 04:38:07,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:38:07,332 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:38:07,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:38:07,333 INFO L85 PathProgramCache]: Analyzing trace with hash 219625542, now seen corresponding path program 1 times [2022-10-16 04:38:07,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:38:07,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919188248] [2022-10-16 04:38:07,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:38:07,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:38:07,349 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-16 04:38:07,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140161851] [2022-10-16 04:38:07,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:38:07,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:38:07,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:38:07,351 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:38:07,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-10-16 04:38:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:38:07,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 36 conjunts are in the unsatisfiable core [2022-10-16 04:38:07,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:38:07,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:38:08,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:38:08,169 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:38:08,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:38:08,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:38:08,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:38:08,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:38:08,450 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 24 treesize of output 20 [2022-10-16 04:38:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:38:09,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:38:09,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919188248] [2022-10-16 04:38:09,025 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-16 04:38:09,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140161851] [2022-10-16 04:38:09,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140161851] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:38:09,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:38:09,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2022-10-16 04:38:09,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808748461] [2022-10-16 04:38:09,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:38:09,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-16 04:38:09,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:38:09,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-16 04:38:09,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-10-16 04:38:09,028 INFO L87 Difference]: Start difference. First operand 376 states and 495 transitions. Second operand has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:09,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:38:09,355 INFO L93 Difference]: Finished difference Result 387 states and 507 transitions. [2022-10-16 04:38:09,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-16 04:38:09,357 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 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 42 [2022-10-16 04:38:09,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:38:09,359 INFO L225 Difference]: With dead ends: 387 [2022-10-16 04:38:09,359 INFO L226 Difference]: Without dead ends: 385 [2022-10-16 04:38:09,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-10-16 04:38:09,360 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 43 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 04:38:09,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 554 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 138 Invalid, 0 Unknown, 81 Unchecked, 0.2s Time] [2022-10-16 04:38:09,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-10-16 04:38:09,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 376. [2022-10-16 04:38:09,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 371 states have (on average 1.3342318059299192) internal successors, (495), 375 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:09,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 495 transitions. [2022-10-16 04:38:09,367 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 495 transitions. Word has length 42 [2022-10-16 04:38:09,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:38:09,367 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 495 transitions. [2022-10-16 04:38:09,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:09,367 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 495 transitions. [2022-10-16 04:38:09,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-10-16 04:38:09,368 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:38:09,369 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:38:09,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-10-16 04:38:09,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-10-16 04:38:09,583 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:38:09,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:38:09,584 INFO L85 PathProgramCache]: Analyzing trace with hash -367208686, now seen corresponding path program 1 times [2022-10-16 04:38:09,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:38:09,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072228348] [2022-10-16 04:38:09,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:38:09,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:38:09,599 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-16 04:38:09,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977155657] [2022-10-16 04:38:09,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:38:09,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:38:09,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:38:09,601 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:38:09,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-10-16 04:38:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:38:09,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 36 conjunts are in the unsatisfiable core [2022-10-16 04:38:09,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:38:09,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:38:10,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:38:10,384 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:38:10,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:38:10,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:38:10,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:38:10,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:38:10,664 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 24 treesize of output 20 [2022-10-16 04:38:11,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:38:11,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:38:11,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072228348] [2022-10-16 04:38:11,234 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-16 04:38:11,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977155657] [2022-10-16 04:38:11,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977155657] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:38:11,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:38:11,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2022-10-16 04:38:11,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172763679] [2022-10-16 04:38:11,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:38:11,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-16 04:38:11,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:38:11,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-16 04:38:11,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-10-16 04:38:11,235 INFO L87 Difference]: Start difference. First operand 376 states and 495 transitions. Second operand has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:11,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:38:11,611 INFO L93 Difference]: Finished difference Result 403 states and 528 transitions. [2022-10-16 04:38:11,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-16 04:38:11,613 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 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 42 [2022-10-16 04:38:11,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:38:11,615 INFO L225 Difference]: With dead ends: 403 [2022-10-16 04:38:11,615 INFO L226 Difference]: Without dead ends: 401 [2022-10-16 04:38:11,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-10-16 04:38:11,616 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 56 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 04:38:11,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 981 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 189 Invalid, 0 Unknown, 194 Unchecked, 0.2s Time] [2022-10-16 04:38:11,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-10-16 04:38:11,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 368. [2022-10-16 04:38:11,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 363 states have (on average 1.3333333333333333) internal successors, (484), 367 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:11,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 484 transitions. [2022-10-16 04:38:11,621 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 484 transitions. Word has length 42 [2022-10-16 04:38:11,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:38:11,621 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 484 transitions. [2022-10-16 04:38:11,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:11,622 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 484 transitions. [2022-10-16 04:38:11,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-10-16 04:38:11,623 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:38:11,623 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:38:11,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-10-16 04:38:11,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-10-16 04:38:11,836 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:38:11,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:38:11,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1415843110, now seen corresponding path program 2 times [2022-10-16 04:38:11,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:38:11,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520434120] [2022-10-16 04:38:11,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:38:11,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:38:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:38:12,323 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:38:12,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:38:12,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520434120] [2022-10-16 04:38:12,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520434120] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:38:12,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384214420] [2022-10-16 04:38:12,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 04:38:12,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:38:12,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:38:12,325 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:38:12,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-10-16 04:38:12,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 04:38:12,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:38:12,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 43 conjunts are in the unsatisfiable core [2022-10-16 04:38:12,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:38:12,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:38:12,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-10-16 04:38:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:38:12,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:38:13,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-10-16 04:38:13,231 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 12 treesize of output 8 [2022-10-16 04:38:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:38:13,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384214420] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:38:13,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:38:13,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2022-10-16 04:38:13,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775692268] [2022-10-16 04:38:13,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:38:13,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-10-16 04:38:13,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:38:13,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-10-16 04:38:13,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2022-10-16 04:38:13,601 INFO L87 Difference]: Start difference. First operand 368 states and 484 transitions. Second operand has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 33 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:15,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:38:15,704 INFO L93 Difference]: Finished difference Result 599 states and 783 transitions. [2022-10-16 04:38:15,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-10-16 04:38:15,706 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 33 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-10-16 04:38:15,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:38:15,708 INFO L225 Difference]: With dead ends: 599 [2022-10-16 04:38:15,708 INFO L226 Difference]: Without dead ends: 599 [2022-10-16 04:38:15,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=310, Invalid=2240, Unknown=0, NotChecked=0, Total=2550 [2022-10-16 04:38:15,709 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 1167 mSDsluCounter, 2568 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1167 SdHoareTripleChecker+Valid, 2738 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-10-16 04:38:15,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1167 Valid, 2738 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1496 Invalid, 0 Unknown, 79 Unchecked, 1.2s Time] [2022-10-16 04:38:15,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-10-16 04:38:15,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 352. [2022-10-16 04:38:15,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 347 states have (on average 1.3314121037463977) internal successors, (462), 351 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:15,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 462 transitions. [2022-10-16 04:38:15,716 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 462 transitions. Word has length 42 [2022-10-16 04:38:15,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:38:15,716 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 462 transitions. [2022-10-16 04:38:15,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 33 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:15,717 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 462 transitions. [2022-10-16 04:38:15,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-10-16 04:38:15,718 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:38:15,718 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:38:15,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-10-16 04:38:15,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:38:15,933 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:38:15,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:38:15,934 INFO L85 PathProgramCache]: Analyzing trace with hash -340568627, now seen corresponding path program 1 times [2022-10-16 04:38:15,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:38:15,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753121668] [2022-10-16 04:38:15,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:38:15,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:38:15,949 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-16 04:38:15,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1961185702] [2022-10-16 04:38:15,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:38:15,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:38:15,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:38:15,951 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:38:15,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-10-16 04:38:16,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:38:16,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 36 conjunts are in the unsatisfiable core [2022-10-16 04:38:16,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:38:16,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:38:16,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:38:16,813 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:38:16,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:38:16,836 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:38:16,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:38:17,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:38:17,121 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 24 treesize of output 20 [2022-10-16 04:38:17,704 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:38:17,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:38:17,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753121668] [2022-10-16 04:38:17,705 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-16 04:38:17,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961185702] [2022-10-16 04:38:17,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961185702] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:38:17,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:38:17,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2022-10-16 04:38:17,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712667037] [2022-10-16 04:38:17,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:38:17,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-16 04:38:17,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:38:17,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-16 04:38:17,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-10-16 04:38:17,707 INFO L87 Difference]: Start difference. First operand 352 states and 462 transitions. Second operand has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:18,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:38:18,138 INFO L93 Difference]: Finished difference Result 374 states and 490 transitions. [2022-10-16 04:38:18,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-16 04:38:18,140 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-10-16 04:38:18,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:38:18,142 INFO L225 Difference]: With dead ends: 374 [2022-10-16 04:38:18,142 INFO L226 Difference]: Without dead ends: 372 [2022-10-16 04:38:18,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-10-16 04:38:18,143 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 31 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 04:38:18,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 970 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 233 Invalid, 0 Unknown, 100 Unchecked, 0.3s Time] [2022-10-16 04:38:18,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-10-16 04:38:18,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 364. [2022-10-16 04:38:18,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 359 states have (on average 1.3342618384401115) internal successors, (479), 363 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:18,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 479 transitions. [2022-10-16 04:38:18,150 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 479 transitions. Word has length 43 [2022-10-16 04:38:18,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:38:18,150 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 479 transitions. [2022-10-16 04:38:18,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:18,151 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 479 transitions. [2022-10-16 04:38:18,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-10-16 04:38:18,151 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:38:18,152 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:38:18,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-10-16 04:38:18,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:38:18,359 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:38:18,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:38:18,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1594904746, now seen corresponding path program 2 times [2022-10-16 04:38:18,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:38:18,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231923404] [2022-10-16 04:38:18,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:38:18,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:38:18,373 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-16 04:38:18,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209353338] [2022-10-16 04:38:18,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 04:38:18,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:38:18,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:38:18,374 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:38:18,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-10-16 04:38:18,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 04:38:18,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:38:18,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 42 conjunts are in the unsatisfiable core [2022-10-16 04:38:18,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:38:18,643 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:38:18,938 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:38:18,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:38:19,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:38:19,158 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 16 treesize of output 12 [2022-10-16 04:38:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:38:19,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:38:19,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231923404] [2022-10-16 04:38:19,390 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-16 04:38:19,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209353338] [2022-10-16 04:38:19,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209353338] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:38:19,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:38:19,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2022-10-16 04:38:19,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886301595] [2022-10-16 04:38:19,390 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:38:19,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-10-16 04:38:19,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:38:19,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-10-16 04:38:19,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-10-16 04:38:19,392 INFO L87 Difference]: Start difference. First operand 364 states and 479 transitions. Second operand has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:20,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:38:20,166 INFO L93 Difference]: Finished difference Result 450 states and 587 transitions. [2022-10-16 04:38:20,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-16 04:38:20,168 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-10-16 04:38:20,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:38:20,170 INFO L225 Difference]: With dead ends: 450 [2022-10-16 04:38:20,170 INFO L226 Difference]: Without dead ends: 431 [2022-10-16 04:38:20,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-10-16 04:38:20,170 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 143 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-16 04:38:20,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 1268 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 543 Invalid, 0 Unknown, 234 Unchecked, 0.6s Time] [2022-10-16 04:38:20,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-10-16 04:38:20,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 352. [2022-10-16 04:38:20,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 347 states have (on average 1.3371757925072045) internal successors, (464), 351 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:20,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 464 transitions. [2022-10-16 04:38:20,176 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 464 transitions. Word has length 43 [2022-10-16 04:38:20,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:38:20,176 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 464 transitions. [2022-10-16 04:38:20,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:20,176 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 464 transitions. [2022-10-16 04:38:20,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-10-16 04:38:20,177 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:38:20,177 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:38:20,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-10-16 04:38:20,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:38:20,392 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:38:20,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:38:20,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2082320310, now seen corresponding path program 1 times [2022-10-16 04:38:20,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:38:20,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007942092] [2022-10-16 04:38:20,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:38:20,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:38:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:38:20,852 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:38:20,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:38:20,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007942092] [2022-10-16 04:38:20,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007942092] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:38:20,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35095570] [2022-10-16 04:38:20,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:38:20,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:38:20,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:38:20,854 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:38:20,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-10-16 04:38:21,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:38:21,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 35 conjunts are in the unsatisfiable core [2022-10-16 04:38:21,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:38:21,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 04:38:21,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:38:21,698 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-10-16 04:38:21,704 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-16 04:38:21,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-16 04:38:21,976 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:38:21,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:38:23,925 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:38:23,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-10-16 04:38:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:38:24,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35095570] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:38:24,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:38:24,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 41 [2022-10-16 04:38:24,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780899092] [2022-10-16 04:38:24,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:38:24,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-10-16 04:38:24,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:38:24,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-10-16 04:38:24,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-10-16 04:38:24,130 INFO L87 Difference]: Start difference. First operand 352 states and 464 transitions. Second operand has 41 states, 41 states have (on average 2.8536585365853657) internal successors, (117), 41 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:27,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:38:27,771 INFO L93 Difference]: Finished difference Result 614 states and 802 transitions. [2022-10-16 04:38:27,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-10-16 04:38:27,772 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.8536585365853657) internal successors, (117), 41 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-10-16 04:38:27,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:38:27,775 INFO L225 Difference]: With dead ends: 614 [2022-10-16 04:38:27,776 INFO L226 Difference]: Without dead ends: 614 [2022-10-16 04:38:27,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=552, Invalid=3738, Unknown=0, NotChecked=0, Total=4290 [2022-10-16 04:38:27,777 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 1990 mSDsluCounter, 4087 mSDsCounter, 0 mSdLazyCounter, 2325 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1990 SdHoareTripleChecker+Valid, 4316 SdHoareTripleChecker+Invalid, 2836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 2325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:38:27,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1990 Valid, 4316 Invalid, 2836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 2325 Invalid, 0 Unknown, 313 Unchecked, 2.0s Time] [2022-10-16 04:38:27,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-10-16 04:38:27,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 356. [2022-10-16 04:38:27,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 351 states have (on average 1.3361823361823362) internal successors, (469), 355 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:27,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 469 transitions. [2022-10-16 04:38:27,784 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 469 transitions. Word has length 43 [2022-10-16 04:38:27,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:38:27,784 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 469 transitions. [2022-10-16 04:38:27,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.8536585365853657) internal successors, (117), 41 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:27,785 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 469 transitions. [2022-10-16 04:38:27,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-10-16 04:38:27,786 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:38:27,786 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:38:27,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-10-16 04:38:28,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:38:28,000 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:38:28,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:38:28,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1341990410, now seen corresponding path program 5 times [2022-10-16 04:38:28,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:38:28,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2931860] [2022-10-16 04:38:28,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:38:28,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:38:28,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:38:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:38:28,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:38:28,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2931860] [2022-10-16 04:38:28,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2931860] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:38:28,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987690508] [2022-10-16 04:38:28,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-16 04:38:28,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:38:28,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:38:28,538 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:38:28,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-10-16 04:38:28,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-10-16 04:38:28,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:38:28,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 50 conjunts are in the unsatisfiable core [2022-10-16 04:38:28,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:38:29,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:38:29,575 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:38:29,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:38:29,612 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:38:29,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:38:30,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:38:30,127 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 20 treesize of output 16 [2022-10-16 04:38:30,593 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:38:30,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987690508] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:38:30,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:38:30,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-10-16 04:38:30,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690994457] [2022-10-16 04:38:30,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:38:30,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-10-16 04:38:30,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:38:30,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-10-16 04:38:30,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1761, Unknown=0, NotChecked=0, Total=1892 [2022-10-16 04:38:30,595 INFO L87 Difference]: Start difference. First operand 356 states and 469 transitions. Second operand has 44 states, 44 states have (on average 2.3181818181818183) internal successors, (102), 44 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:33,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:38:33,720 INFO L93 Difference]: Finished difference Result 792 states and 1040 transitions. [2022-10-16 04:38:33,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-10-16 04:38:33,721 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.3181818181818183) internal successors, (102), 44 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-10-16 04:38:33,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:38:33,724 INFO L225 Difference]: With dead ends: 792 [2022-10-16 04:38:33,725 INFO L226 Difference]: Without dead ends: 792 [2022-10-16 04:38:33,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=293, Invalid=3013, Unknown=0, NotChecked=0, Total=3306 [2022-10-16 04:38:33,725 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 1916 mSDsluCounter, 4867 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1916 SdHoareTripleChecker+Valid, 5116 SdHoareTripleChecker+Invalid, 2707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:38:33,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1916 Valid, 5116 Invalid, 2707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 2261 Invalid, 0 Unknown, 291 Unchecked, 2.1s Time] [2022-10-16 04:38:33,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-10-16 04:38:33,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 358. [2022-10-16 04:38:33,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 353 states have (on average 1.3342776203966005) internal successors, (471), 357 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:33,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 471 transitions. [2022-10-16 04:38:33,732 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 471 transitions. Word has length 43 [2022-10-16 04:38:33,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:38:33,732 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 471 transitions. [2022-10-16 04:38:33,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.3181818181818183) internal successors, (102), 44 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:38:33,733 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 471 transitions. [2022-10-16 04:38:33,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-10-16 04:38:33,733 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:38:33,733 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:38:33,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-10-16 04:38:33,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-10-16 04:38:33,936 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:38:33,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:38:33,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1717091071, now seen corresponding path program 11 times [2022-10-16 04:38:33,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:38:33,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810956747] [2022-10-16 04:38:33,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:38:33,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:38:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:38:34,850 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:38:34,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:38:34,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810956747] [2022-10-16 04:38:34,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810956747] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:38:34,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345735228] [2022-10-16 04:38:34,851 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-16 04:38:34,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:38:34,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:38:34,852 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:38:34,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-10-16 04:38:35,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-10-16 04:38:35,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:38:35,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 58 conjunts are in the unsatisfiable core [2022-10-16 04:38:35,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:38:35,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 04:38:35,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 04:38:35,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:38:35,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-10-16 04:38:35,865 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-16 04:38:35,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-16 04:38:36,156 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:38:36,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:38:43,247 WARN L233 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-10-16 04:38:49,625 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-10-16 04:39:00,258 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-10-16 04:39:06,607 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-10-16 04:39:12,978 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-10-16 04:39:19,322 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-10-16 04:39:19,461 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 66 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:39:19,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345735228] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:39:19,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:39:19,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 43 [2022-10-16 04:39:19,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873132588] [2022-10-16 04:39:19,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:39:19,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-10-16 04:39:19,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:39:19,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-10-16 04:39:19,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1627, Unknown=0, NotChecked=0, Total=1892 [2022-10-16 04:39:19,464 INFO L87 Difference]: Start difference. First operand 358 states and 471 transitions. Second operand has 44 states, 43 states have (on average 2.86046511627907) internal successors, (123), 44 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:39:23,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:39:23,675 INFO L93 Difference]: Finished difference Result 1122 states and 1464 transitions. [2022-10-16 04:39:23,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-10-16 04:39:23,677 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.86046511627907) internal successors, (123), 44 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-10-16 04:39:23,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:39:23,682 INFO L225 Difference]: With dead ends: 1122 [2022-10-16 04:39:23,682 INFO L226 Difference]: Without dead ends: 1122 [2022-10-16 04:39:23,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 44.9s TimeCoverageRelationStatistics Valid=785, Invalid=2997, Unknown=0, NotChecked=0, Total=3782 [2022-10-16 04:39:23,683 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 1420 mSDsluCounter, 4054 mSDsCounter, 0 mSdLazyCounter, 2585 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1420 SdHoareTripleChecker+Valid, 4418 SdHoareTripleChecker+Invalid, 2885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 2585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-10-16 04:39:23,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1420 Valid, 4418 Invalid, 2885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 2585 Invalid, 0 Unknown, 137 Unchecked, 2.6s Time] [2022-10-16 04:39:23,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2022-10-16 04:39:23,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 392. [2022-10-16 04:39:23,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 387 states have (on average 1.3359173126614987) internal successors, (517), 391 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:39:23,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 517 transitions. [2022-10-16 04:39:23,693 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 517 transitions. Word has length 43 [2022-10-16 04:39:23,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:39:23,694 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 517 transitions. [2022-10-16 04:39:23,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.86046511627907) internal successors, (123), 44 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:39:23,694 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 517 transitions. [2022-10-16 04:39:23,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-10-16 04:39:23,695 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:39:23,695 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:39:23,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-10-16 04:39:23,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-10-16 04:39:23,901 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:39:23,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:39:23,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1447553830, now seen corresponding path program 3 times [2022-10-16 04:39:23,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:39:23,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490583987] [2022-10-16 04:39:23,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:39:23,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:39:23,921 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-16 04:39:23,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448991435] [2022-10-16 04:39:23,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 04:39:23,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:39:23,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:39:23,922 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:39:23,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-10-16 04:39:24,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-10-16 04:39:24,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:39:24,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 45 conjunts are in the unsatisfiable core [2022-10-16 04:39:24,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:39:24,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 04:39:24,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 04:39:24,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-10-16 04:39:24,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:39:24,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-10-16 04:39:24,282 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-16 04:39:24,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-16 04:39:24,378 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-10-16 04:39:24,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2022-10-16 04:39:24,680 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-10-16 04:39:24,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:39:25,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-10-16 04:39:25,899 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 22 treesize of output 20 [2022-10-16 04:39:28,645 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-10-16 04:39:28,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:39:28,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490583987] [2022-10-16 04:39:28,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-16 04:39:28,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448991435] [2022-10-16 04:39:28,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448991435] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:39:28,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:39:28,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2022-10-16 04:39:28,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105773883] [2022-10-16 04:39:28,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:39:28,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-16 04:39:28,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:39:28,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-16 04:39:28,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-10-16 04:39:28,648 INFO L87 Difference]: Start difference. First operand 392 states and 517 transitions. Second operand has 17 states, 16 states have (on average 4.25) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:39:29,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:39:29,831 INFO L93 Difference]: Finished difference Result 531 states and 690 transitions. [2022-10-16 04:39:29,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-16 04:39:29,833 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.25) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-10-16 04:39:29,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:39:29,834 INFO L225 Difference]: With dead ends: 531 [2022-10-16 04:39:29,834 INFO L226 Difference]: Without dead ends: 131 [2022-10-16 04:39:29,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=224, Invalid=646, Unknown=0, NotChecked=0, Total=870 [2022-10-16 04:39:29,834 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 144 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 04:39:29,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 220 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 163 Invalid, 0 Unknown, 47 Unchecked, 0.3s Time] [2022-10-16 04:39:29,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-10-16 04:39:29,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 110. [2022-10-16 04:39:29,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.2190476190476192) internal successors, (128), 109 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:39:29,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 128 transitions. [2022-10-16 04:39:29,838 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 128 transitions. Word has length 44 [2022-10-16 04:39:29,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:39:29,839 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 128 transitions. [2022-10-16 04:39:29,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.25) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:39:29,839 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 128 transitions. [2022-10-16 04:39:29,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-16 04:39:29,839 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:39:29,839 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:39:29,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-10-16 04:39:30,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:39:30,048 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:39:30,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:39:30,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1113860849, now seen corresponding path program 5 times [2022-10-16 04:39:30,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:39:30,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052393859] [2022-10-16 04:39:30,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:39:30,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:39:30,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:39:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:39:30,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:39:30,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052393859] [2022-10-16 04:39:30,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052393859] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:39:30,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796733239] [2022-10-16 04:39:30,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-16 04:39:30,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:39:30,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:39:30,654 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:39:30,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-10-16 04:39:30,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-10-16 04:39:30,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:39:30,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 50 conjunts are in the unsatisfiable core [2022-10-16 04:39:30,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:39:31,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:39:31,863 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:39:31,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-16 04:39:31,906 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:39:31,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:39:32,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:39:32,493 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 20 treesize of output 16 [2022-10-16 04:39:33,191 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:39:33,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796733239] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:39:33,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:39:33,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-10-16 04:39:33,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704516724] [2022-10-16 04:39:33,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:39:33,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-10-16 04:39:33,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:39:33,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-10-16 04:39:33,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1761, Unknown=0, NotChecked=0, Total=1892 [2022-10-16 04:39:33,194 INFO L87 Difference]: Start difference. First operand 110 states and 128 transitions. Second operand has 44 states, 44 states have (on average 2.4545454545454546) internal successors, (108), 44 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:39:35,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:39:35,219 INFO L93 Difference]: Finished difference Result 162 states and 187 transitions. [2022-10-16 04:39:35,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-10-16 04:39:35,221 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.4545454545454546) internal successors, (108), 44 states have internal predecessors, (108), 0 states have call successors, (0), 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 45 [2022-10-16 04:39:35,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:39:35,222 INFO L225 Difference]: With dead ends: 162 [2022-10-16 04:39:35,222 INFO L226 Difference]: Without dead ends: 162 [2022-10-16 04:39:35,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=297, Invalid=3009, Unknown=0, NotChecked=0, Total=3306 [2022-10-16 04:39:35,223 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 465 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-16 04:39:35,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 825 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 814 Invalid, 0 Unknown, 273 Unchecked, 0.8s Time] [2022-10-16 04:39:35,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-10-16 04:39:35,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 112. [2022-10-16 04:39:35,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.2149532710280373) internal successors, (130), 111 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:39:35,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 130 transitions. [2022-10-16 04:39:35,226 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 130 transitions. Word has length 45 [2022-10-16 04:39:35,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:39:35,226 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 130 transitions. [2022-10-16 04:39:35,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.4545454545454546) internal successors, (108), 44 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:39:35,227 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 130 transitions. [2022-10-16 04:39:35,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-16 04:39:35,227 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:39:35,227 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:39:35,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-10-16 04:39:35,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:39:35,433 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-16 04:39:35,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:39:35,434 INFO L85 PathProgramCache]: Analyzing trace with hash 857076920, now seen corresponding path program 12 times [2022-10-16 04:39:35,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:39:35,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269264620] [2022-10-16 04:39:35,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:39:35,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:39:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:39:36,149 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:39:36,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:39:36,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269264620] [2022-10-16 04:39:36,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269264620] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:39:36,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640137857] [2022-10-16 04:39:36,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-10-16 04:39:36,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:39:36,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:39:36,153 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:39:36,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-10-16 04:39:36,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-10-16 04:39:36,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:39:36,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 56 conjunts are in the unsatisfiable core [2022-10-16 04:39:36,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:39:36,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10