/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-patterns/array23_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 16:25:18,893 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 16:25:18,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 16:25:18,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 16:25:18,944 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 16:25:18,948 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 16:25:18,952 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 16:25:18,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 16:25:18,964 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 16:25:18,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 16:25:18,973 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 16:25:18,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 16:25:18,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 16:25:18,977 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 16:25:18,979 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 16:25:18,985 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 16:25:19,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 16:25:19,006 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 16:25:19,009 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 16:25:19,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 16:25:19,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 16:25:19,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 16:25:19,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 16:25:19,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 16:25:19,033 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-15 16:25:19,039 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-15 16:25:19,040 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-15 16:25:19,041 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-15 16:25:19,042 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-15 16:25:19,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-15 16:25:19,044 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-15 16:25:19,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-15 16:25:19,045 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-15 16:25:19,045 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 16:25:19,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 16:25:19,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 16:25:19,048 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-15 16:25:19,098 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 16:25:19,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 16:25:19,099 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 16:25:19,099 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 16:25:19,100 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 16:25:19,100 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 16:25:19,103 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 16:25:19,103 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 16:25:19,103 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 16:25:19,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 16:25:19,105 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 16:25:19,105 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 16:25:19,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 16:25:19,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 16:25:19,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 16:25:19,106 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 16:25:19,106 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 16:25:19,106 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 16:25:19,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 16:25:19,107 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 16:25:19,107 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 16:25:19,107 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 16:25:19,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 16:25:19,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 16:25:19,108 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 16:25:19,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 16:25:19,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 16:25:19,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 16:25:19,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 16:25:19,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 16:25:19,109 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 16:25:19,472 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 16:25:19,500 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 16:25:19,503 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 16:25:19,504 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 16:25:19,506 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 16:25:19,508 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array23_pattern.c [2022-10-15 16:25:19,589 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/989bcfc31/199a8f85037c414db62da007480fe697/FLAG50821a7c7 [2022-10-15 16:25:20,245 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 16:25:20,246 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array23_pattern.c [2022-10-15 16:25:20,255 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/989bcfc31/199a8f85037c414db62da007480fe697/FLAG50821a7c7 [2022-10-15 16:25:20,597 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/989bcfc31/199a8f85037c414db62da007480fe697 [2022-10-15 16:25:20,601 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 16:25:20,619 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 16:25:20,620 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 16:25:20,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 16:25:20,625 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 16:25:20,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:25:20" (1/1) ... [2022-10-15 16:25:20,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b1e747d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:25:20, skipping insertion in model container [2022-10-15 16:25:20,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:25:20" (1/1) ... [2022-10-15 16:25:20,637 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 16:25:20,656 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 16:25:20,801 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array23_pattern.c[1347,1360] [2022-10-15 16:25:20,831 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 16:25:20,841 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 16:25:20,856 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array23_pattern.c[1347,1360] [2022-10-15 16:25:20,871 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 16:25:20,888 INFO L208 MainTranslator]: Completed translation [2022-10-15 16:25:20,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:25:20 WrapperNode [2022-10-15 16:25:20,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 16:25:20,890 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 16:25:20,890 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 16:25:20,890 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 16:25:20,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:25:20" (1/1) ... [2022-10-15 16:25:20,908 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:25:20" (1/1) ... [2022-10-15 16:25:20,936 INFO L138 Inliner]: procedures = 17, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108 [2022-10-15 16:25:20,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 16:25:20,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 16:25:20,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 16:25:20,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 16:25:20,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:25:20" (1/1) ... [2022-10-15 16:25:20,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:25:20" (1/1) ... [2022-10-15 16:25:20,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:25:20" (1/1) ... [2022-10-15 16:25:20,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:25:20" (1/1) ... [2022-10-15 16:25:20,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:25:20" (1/1) ... [2022-10-15 16:25:20,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:25:20" (1/1) ... [2022-10-15 16:25:20,967 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:25:20" (1/1) ... [2022-10-15 16:25:20,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:25:20" (1/1) ... [2022-10-15 16:25:20,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 16:25:20,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 16:25:20,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 16:25:20,973 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 16:25:20,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:25:20" (1/1) ... [2022-10-15 16:25:20,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 16:25:20,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:25:21,016 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-15 16:25:21,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-15 16:25:21,072 INFO L130 BoogieDeclarations]: Found specification of procedure outerBoundaryPatternCheck [2022-10-15 16:25:21,073 INFO L138 BoogieDeclarations]: Found implementation of procedure outerBoundaryPatternCheck [2022-10-15 16:25:21,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 16:25:21,073 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-15 16:25:21,073 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-15 16:25:21,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 16:25:21,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 16:25:21,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 16:25:21,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 16:25:21,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 16:25:21,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 16:25:21,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 16:25:21,157 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 16:25:21,160 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 16:25:21,568 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 16:25:21,576 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 16:25:21,577 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-10-15 16:25:21,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:25:21 BoogieIcfgContainer [2022-10-15 16:25:21,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 16:25:21,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 16:25:21,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 16:25:21,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 16:25:21,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 04:25:20" (1/3) ... [2022-10-15 16:25:21,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ae138c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:25:21, skipping insertion in model container [2022-10-15 16:25:21,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:25:20" (2/3) ... [2022-10-15 16:25:21,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ae138c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:25:21, skipping insertion in model container [2022-10-15 16:25:21,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:25:21" (3/3) ... [2022-10-15 16:25:21,590 INFO L112 eAbstractionObserver]: Analyzing ICFG array23_pattern.c [2022-10-15 16:25:21,612 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 16:25:21,612 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2022-10-15 16:25:21,669 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 16:25:21,678 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;@40a7c575, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 16:25:21,678 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2022-10-15 16:25:21,684 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 55 states have internal predecessors, (71), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-15 16:25:21,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-15 16:25:21,693 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:25:21,694 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:25:21,695 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:25:21,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:25:21,701 INFO L85 PathProgramCache]: Analyzing trace with hash 216098586, now seen corresponding path program 1 times [2022-10-15 16:25:21,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:25:21,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159771948] [2022-10-15 16:25:21,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:21,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:25:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:25:21,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:25:21,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159771948] [2022-10-15 16:25:21,886 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-10-15 16:25:21,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232050292] [2022-10-15 16:25:21,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:21,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:21,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:25:21,892 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:25:21,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-15 16:25:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:25:22,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 1 conjunts are in the unsatisfiable core [2022-10-15 16:25:22,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:25:22,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:25:22,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:25:22,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232050292] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:25:22,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:25:22,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 16:25:22,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902233200] [2022-10-15 16:25:22,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:25:22,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-15 16:25:22,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:25:22,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-15 16:25:22,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-15 16:25:22,117 INFO L87 Difference]: Start difference. First operand has 63 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 55 states have internal predecessors, (71), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 16:25:22,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:25:22,150 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2022-10-15 16:25:22,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-15 16:25:22,152 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-10-15 16:25:22,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:25:22,162 INFO L225 Difference]: With dead ends: 63 [2022-10-15 16:25:22,163 INFO L226 Difference]: Without dead ends: 61 [2022-10-15 16:25:22,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-15 16:25:22,172 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 16:25:22,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 16:25:22,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-10-15 16:25:22,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-10-15 16:25:22,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 40 states have (on average 1.525) internal successors, (61), 53 states have internal predecessors, (61), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-15 16:25:22,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-10-15 16:25:22,254 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 11 [2022-10-15 16:25:22,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:25:22,255 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-10-15 16:25:22,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 16:25:22,256 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-10-15 16:25:22,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-15 16:25:22,258 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:25:22,259 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:25:22,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-15 16:25:22,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-10-15 16:25:22,473 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:25:22,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:25:22,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1991105948, now seen corresponding path program 1 times [2022-10-15 16:25:22,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:25:22,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634198607] [2022-10-15 16:25:22,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:22,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:25:22,515 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:25:22,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820120880] [2022-10-15 16:25:22,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:22,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:22,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:25:22,519 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:25:22,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-15 16:25:22,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:25:22,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-15 16:25:22,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:25:22,709 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 [2022-10-15 16:25:22,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:25:22,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:25:22,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:25:22,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634198607] [2022-10-15 16:25:22,735 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:25:22,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820120880] [2022-10-15 16:25:22,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820120880] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:25:22,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:25:22,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 16:25:22,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804682815] [2022-10-15 16:25:22,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:25:22,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 16:25:22,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:25:22,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 16:25:22,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:25:22,741 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 16:25:22,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:25:22,838 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2022-10-15 16:25:22,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 16:25:22,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-10-15 16:25:22,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:25:22,843 INFO L225 Difference]: With dead ends: 55 [2022-10-15 16:25:22,843 INFO L226 Difference]: Without dead ends: 55 [2022-10-15 16:25:22,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:25:22,848 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 41 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:25:22,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 61 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:25:22,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-10-15 16:25:22,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-10-15 16:25:22,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.375) internal successors, (55), 47 states have internal predecessors, (55), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-15 16:25:22,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2022-10-15 16:25:22,862 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 11 [2022-10-15 16:25:22,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:25:22,864 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2022-10-15 16:25:22,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 16:25:22,865 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2022-10-15 16:25:22,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-15 16:25:22,865 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:25:22,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:25:22,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-15 16:25:23,080 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,SelfDestructingSolverStorable1 [2022-10-15 16:25:23,082 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:25:23,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:25:23,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1991105949, now seen corresponding path program 1 times [2022-10-15 16:25:23,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:25:23,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199176433] [2022-10-15 16:25:23,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:23,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:25:23,121 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:25:23,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [173119698] [2022-10-15 16:25:23,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:23,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:23,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:25:23,130 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:25:23,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-15 16:25:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:25:23,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-15 16:25:23,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:25:23,382 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 [2022-10-15 16:25:23,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:25:23,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:25:23,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:25:23,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199176433] [2022-10-15 16:25:23,541 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:25:23,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173119698] [2022-10-15 16:25:23,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173119698] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:25:23,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:25:23,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-15 16:25:23,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079072354] [2022-10-15 16:25:23,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:25:23,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 16:25:23,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:25:23,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 16:25:23,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-10-15 16:25:23,545 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 16:25:23,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:25:23,798 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2022-10-15 16:25:23,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-15 16:25:23,799 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-10-15 16:25:23,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:25:23,802 INFO L225 Difference]: With dead ends: 68 [2022-10-15 16:25:23,802 INFO L226 Difference]: Without dead ends: 68 [2022-10-15 16:25:23,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-10-15 16:25:23,805 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 70 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 16:25:23,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 117 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 16:25:23,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-10-15 16:25:23,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2022-10-15 16:25:23,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 46 states have (on average 1.326086956521739) internal successors, (61), 53 states have internal predecessors, (61), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-15 16:25:23,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2022-10-15 16:25:23,821 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 11 [2022-10-15 16:25:23,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:25:23,822 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2022-10-15 16:25:23,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 16:25:23,822 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2022-10-15 16:25:23,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-15 16:25:23,823 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:25:23,823 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:25:23,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-15 16:25:24,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:24,025 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:25:24,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:25:24,027 INFO L85 PathProgramCache]: Analyzing trace with hash -756027353, now seen corresponding path program 1 times [2022-10-15 16:25:24,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:25:24,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543722760] [2022-10-15 16:25:24,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:24,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:25:24,052 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:25:24,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [385471381] [2022-10-15 16:25:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:24,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:24,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:25:24,054 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:25:24,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-15 16:25:24,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:25:24,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-15 16:25:24,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:25:24,209 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 [2022-10-15 16:25:25,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:25:25,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:25:33,963 WARN L855 $PredicateComparison]: unable to prove that (or (let ((.cse1 (mod c_~ARR_SIZE~0 4294967296))) (let ((.cse0 (<= .cse1 2147483647)) (.cse2 (* (* .cse1 .cse1) 4))) (and (or .cse0 (< (* .cse1 34359738368) (+ 73786976294838206457 .cse2))) (or (< .cse2 4) (not .cse0) (< 7 .cse2))))) (not (< 1 c_~ARR_SIZE~0))) is different from true [2022-10-15 16:25:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:25:43,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:25:43,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543722760] [2022-10-15 16:25:43,089 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:25:43,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385471381] [2022-10-15 16:25:43,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385471381] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:25:43,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:25:43,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-10-15 16:25:43,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957728438] [2022-10-15 16:25:43,090 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:25:43,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-15 16:25:43,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:25:43,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-15 16:25:43,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=119, Unknown=3, NotChecked=24, Total=210 [2022-10-15 16:25:43,092 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 16:25:48,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:25:48,234 INFO L93 Difference]: Finished difference Result 131 states and 163 transitions. [2022-10-15 16:25:48,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-10-15 16:25:48,235 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2022-10-15 16:25:48,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:25:48,237 INFO L225 Difference]: With dead ends: 131 [2022-10-15 16:25:48,237 INFO L226 Difference]: Without dead ends: 131 [2022-10-15 16:25:48,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=249, Invalid=454, Unknown=3, NotChecked=50, Total=756 [2022-10-15 16:25:48,239 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 357 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:25:48,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 198 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 318 Invalid, 0 Unknown, 113 Unchecked, 2.1s Time] [2022-10-15 16:25:48,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-10-15 16:25:48,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 71. [2022-10-15 16:25:48,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 62 states have internal predecessors, (75), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-15 16:25:48,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-10-15 16:25:48,252 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 14 [2022-10-15 16:25:48,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:25:48,252 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-10-15 16:25:48,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 16:25:48,253 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-10-15 16:25:48,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-15 16:25:48,253 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:25:48,254 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:25:48,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-15 16:25:48,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:48,468 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:25:48,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:25:48,469 INFO L85 PathProgramCache]: Analyzing trace with hash -4023162, now seen corresponding path program 1 times [2022-10-15 16:25:48,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:25:48,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239039376] [2022-10-15 16:25:48,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:48,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:25:48,499 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:25:48,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2004015678] [2022-10-15 16:25:48,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:48,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:48,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:25:48,505 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:25:48,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-15 16:25:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:25:48,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-15 16:25:48,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:25:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:25:48,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:25:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:25:48,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:25:48,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239039376] [2022-10-15 16:25:48,662 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:25:48,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004015678] [2022-10-15 16:25:48,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004015678] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:25:48,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:25:48,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-10-15 16:25:48,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532221634] [2022-10-15 16:25:48,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:25:48,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-15 16:25:48,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:25:48,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-15 16:25:48,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-10-15 16:25:48,667 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 16:25:49,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:25:49,061 INFO L93 Difference]: Finished difference Result 186 states and 219 transitions. [2022-10-15 16:25:49,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-15 16:25:49,062 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-10-15 16:25:49,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:25:49,064 INFO L225 Difference]: With dead ends: 186 [2022-10-15 16:25:49,064 INFO L226 Difference]: Without dead ends: 186 [2022-10-15 16:25:49,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2022-10-15 16:25:49,066 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 306 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 16:25:49,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 231 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 16:25:49,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-10-15 16:25:49,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 111. [2022-10-15 16:25:49,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 91 states have (on average 1.4065934065934067) internal successors, (128), 98 states have internal predecessors, (128), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-10-15 16:25:49,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 146 transitions. [2022-10-15 16:25:49,082 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 146 transitions. Word has length 17 [2022-10-15 16:25:49,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:25:49,083 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 146 transitions. [2022-10-15 16:25:49,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 16:25:49,083 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 146 transitions. [2022-10-15 16:25:49,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-15 16:25:49,084 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:25:49,084 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:25:49,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-15 16:25:49,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:49,299 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:25:49,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:25:49,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1456152464, now seen corresponding path program 2 times [2022-10-15 16:25:49,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:25:49,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095381002] [2022-10-15 16:25:49,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:49,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:25:49,331 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:25:49,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788204117] [2022-10-15 16:25:49,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:25:49,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:49,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:25:49,333 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) [2022-10-15 16:25:49,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-15 16:25:49,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 16:25:49,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:25:49,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-15 16:25:49,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:25:49,432 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 [2022-10-15 16:25:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:25:50,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:25:53,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:25:53,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:25:53,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095381002] [2022-10-15 16:25:53,468 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:25:53,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788204117] [2022-10-15 16:25:53,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788204117] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:25:53,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:25:53,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2022-10-15 16:25:53,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619956404] [2022-10-15 16:25:53,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:25:53,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-15 16:25:53,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:25:53,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-15 16:25:53,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-10-15 16:25:53,471 INFO L87 Difference]: Start difference. First operand 111 states and 146 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 16:26:00,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:26:00,953 INFO L93 Difference]: Finished difference Result 281 states and 364 transitions. [2022-10-15 16:26:00,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-10-15 16:26:00,954 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-10-15 16:26:00,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:26:00,956 INFO L225 Difference]: With dead ends: 281 [2022-10-15 16:26:00,956 INFO L226 Difference]: Without dead ends: 281 [2022-10-15 16:26:00,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=421, Invalid=769, Unknown=0, NotChecked=0, Total=1190 [2022-10-15 16:26:00,959 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 379 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-10-15 16:26:00,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 214 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-10-15 16:26:00,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-10-15 16:26:00,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 217. [2022-10-15 16:26:00,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 189 states have (on average 1.4232804232804233) internal successors, (269), 196 states have internal predecessors, (269), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-10-15 16:26:00,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 303 transitions. [2022-10-15 16:26:00,986 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 303 transitions. Word has length 20 [2022-10-15 16:26:00,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:26:00,987 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 303 transitions. [2022-10-15 16:26:00,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 16:26:00,987 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 303 transitions. [2022-10-15 16:26:00,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-15 16:26:00,989 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:26:00,989 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:26:01,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-15 16:26:01,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:26:01,200 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:26:01,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:26:01,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1104025872, now seen corresponding path program 3 times [2022-10-15 16:26:01,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:26:01,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152738600] [2022-10-15 16:26:01,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:26:01,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:26:01,216 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:26:01,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434246373] [2022-10-15 16:26:01,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 16:26:01,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:26:01,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:26:01,217 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) [2022-10-15 16:26:01,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-15 16:26:01,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-15 16:26:01,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:26:01,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-15 16:26:01,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:26:01,711 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 [2022-10-15 16:26:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-15 16:26:03,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:26:03,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:26:03,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152738600] [2022-10-15 16:26:03,119 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:26:03,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434246373] [2022-10-15 16:26:03,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434246373] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:26:03,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:26:03,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-15 16:26:03,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051212154] [2022-10-15 16:26:03,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:26:03,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 16:26:03,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:26:03,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 16:26:03,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-15 16:26:03,123 INFO L87 Difference]: Start difference. First operand 217 states and 303 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 16:26:03,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:26:03,945 INFO L93 Difference]: Finished difference Result 233 states and 311 transitions. [2022-10-15 16:26:03,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 16:26:03,946 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-10-15 16:26:03,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:26:03,948 INFO L225 Difference]: With dead ends: 233 [2022-10-15 16:26:03,948 INFO L226 Difference]: Without dead ends: 233 [2022-10-15 16:26:03,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-15 16:26:03,950 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 93 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-15 16:26:03,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 98 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-15 16:26:03,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-10-15 16:26:03,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 161. [2022-10-15 16:26:03,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 134 states have (on average 1.3880597014925373) internal successors, (186), 140 states have internal predecessors, (186), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-10-15 16:26:03,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 220 transitions. [2022-10-15 16:26:03,969 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 220 transitions. Word has length 26 [2022-10-15 16:26:03,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:26:03,970 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 220 transitions. [2022-10-15 16:26:03,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 16:26:03,970 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 220 transitions. [2022-10-15 16:26:03,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-10-15 16:26:03,972 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:26:03,972 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-15 16:26:03,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-15 16:26:04,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:26:04,179 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:26:04,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:26:04,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1598684582, now seen corresponding path program 1 times [2022-10-15 16:26:04,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:26:04,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285130319] [2022-10-15 16:26:04,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:26:04,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:26:04,204 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:26:04,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735252182] [2022-10-15 16:26:04,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:26:04,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:26:04,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:26:04,208 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) [2022-10-15 16:26:04,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-15 16:26:04,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:26:04,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-15 16:26:04,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:26:04,347 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-15 16:26:04,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:26:04,497 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-15 16:26:04,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:26:04,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285130319] [2022-10-15 16:26:04,497 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:26:04,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735252182] [2022-10-15 16:26:04,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735252182] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:26:04,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:26:04,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-10-15 16:26:04,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119525269] [2022-10-15 16:26:04,498 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:26:04,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-15 16:26:04,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:26:04,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-15 16:26:04,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-10-15 16:26:04,500 INFO L87 Difference]: Start difference. First operand 161 states and 220 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-10-15 16:26:04,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:26:04,847 INFO L93 Difference]: Finished difference Result 119 states and 144 transitions. [2022-10-15 16:26:04,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-15 16:26:04,848 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 34 [2022-10-15 16:26:04,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:26:04,851 INFO L225 Difference]: With dead ends: 119 [2022-10-15 16:26:04,851 INFO L226 Difference]: Without dead ends: 119 [2022-10-15 16:26:04,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2022-10-15 16:26:04,856 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 190 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 16:26:04,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 176 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 16:26:04,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-10-15 16:26:04,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2022-10-15 16:26:04,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 90 states have (on average 1.3) internal successors, (117), 96 states have internal predecessors, (117), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-10-15 16:26:04,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 135 transitions. [2022-10-15 16:26:04,887 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 135 transitions. Word has length 34 [2022-10-15 16:26:04,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:26:04,888 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 135 transitions. [2022-10-15 16:26:04,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-10-15 16:26:04,888 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 135 transitions. [2022-10-15 16:26:04,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-15 16:26:04,894 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:26:04,894 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-10-15 16:26:04,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-15 16:26:05,095 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,SelfDestructingSolverStorable7 [2022-10-15 16:26:05,096 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:26:05,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:26:05,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1303031772, now seen corresponding path program 2 times [2022-10-15 16:26:05,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:26:05,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100657098] [2022-10-15 16:26:05,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:26:05,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:26:05,113 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:26:05,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1063606159] [2022-10-15 16:26:05,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:26:05,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:26:05,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:26:05,115 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) [2022-10-15 16:26:05,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-15 16:26:05,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 16:26:05,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:26:05,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-15 16:26:05,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:26:05,230 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-15 16:26:05,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:26:05,294 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-15 16:26:05,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:26:05,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100657098] [2022-10-15 16:26:05,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:26:05,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063606159] [2022-10-15 16:26:05,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063606159] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:26:05,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:26:05,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-10-15 16:26:05,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561869386] [2022-10-15 16:26:05,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:26:05,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-15 16:26:05,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:26:05,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-15 16:26:05,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-10-15 16:26:05,297 INFO L87 Difference]: Start difference. First operand 109 states and 135 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-15 16:26:05,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:26:05,614 INFO L93 Difference]: Finished difference Result 120 states and 134 transitions. [2022-10-15 16:26:05,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-15 16:26:05,615 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 37 [2022-10-15 16:26:05,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:26:05,617 INFO L225 Difference]: With dead ends: 120 [2022-10-15 16:26:05,617 INFO L226 Difference]: Without dead ends: 120 [2022-10-15 16:26:05,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-10-15 16:26:05,618 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 118 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 16:26:05,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 247 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 16:26:05,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-10-15 16:26:05,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 89. [2022-10-15 16:26:05,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 80 states have internal predecessors, (92), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-15 16:26:05,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 102 transitions. [2022-10-15 16:26:05,624 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 102 transitions. Word has length 37 [2022-10-15 16:26:05,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:26:05,624 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 102 transitions. [2022-10-15 16:26:05,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-15 16:26:05,625 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 102 transitions. [2022-10-15 16:26:05,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-10-15 16:26:05,626 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:26:05,626 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:26:05,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-15 16:26:05,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:26:05,840 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:26:05,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:26:05,841 INFO L85 PathProgramCache]: Analyzing trace with hash 280729615, now seen corresponding path program 3 times [2022-10-15 16:26:05,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:26:05,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829198497] [2022-10-15 16:26:05,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:26:05,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:26:05,854 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:26:05,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [709286004] [2022-10-15 16:26:05,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 16:26:05,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:26:05,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:26:05,856 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) [2022-10-15 16:26:05,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-15 16:26:06,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-10-15 16:26:06,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:26:06,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 29 conjunts are in the unsatisfiable core [2022-10-15 16:26:06,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:26:06,329 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 [2022-10-15 16:26:09,113 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-10-15 16:26:09,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:26:09,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:26:09,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829198497] [2022-10-15 16:26:09,114 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:26:09,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709286004] [2022-10-15 16:26:09,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709286004] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:26:09,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:26:09,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-10-15 16:26:09,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532838967] [2022-10-15 16:26:09,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:26:09,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-15 16:26:09,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:26:09,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-15 16:26:09,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-10-15 16:26:09,117 INFO L87 Difference]: Start difference. First operand 89 states and 102 transitions. Second operand has 15 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-15 16:26:09,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:26:09,503 INFO L93 Difference]: Finished difference Result 150 states and 175 transitions. [2022-10-15 16:26:09,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-15 16:26:09,503 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 46 [2022-10-15 16:26:09,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:26:09,506 INFO L225 Difference]: With dead ends: 150 [2022-10-15 16:26:09,506 INFO L226 Difference]: Without dead ends: 150 [2022-10-15 16:26:09,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-10-15 16:26:09,508 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 109 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 16:26:09,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 313 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 145 Invalid, 0 Unknown, 101 Unchecked, 0.3s Time] [2022-10-15 16:26:09,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-10-15 16:26:09,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 115. [2022-10-15 16:26:09,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 94 states have (on average 1.2340425531914894) internal successors, (116), 100 states have internal predecessors, (116), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-10-15 16:26:09,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 135 transitions. [2022-10-15 16:26:09,515 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 135 transitions. Word has length 46 [2022-10-15 16:26:09,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:26:09,515 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 135 transitions. [2022-10-15 16:26:09,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-15 16:26:09,515 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 135 transitions. [2022-10-15 16:26:09,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-10-15 16:26:09,517 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:26:09,517 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:26:09,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-10-15 16:26:09,721 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,SelfDestructingSolverStorable9 [2022-10-15 16:26:09,722 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:26:09,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:26:09,723 INFO L85 PathProgramCache]: Analyzing trace with hash 309358766, now seen corresponding path program 1 times [2022-10-15 16:26:09,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:26:09,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622674190] [2022-10-15 16:26:09,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:26:09,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:26:09,737 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:26:09,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302548530] [2022-10-15 16:26:09,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:26:09,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:26:09,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:26:09,739 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) [2022-10-15 16:26:09,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-15 16:26:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:26:09,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-15 16:26:09,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:26:09,818 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-10-15 16:26:09,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:26:09,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:26:09,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622674190] [2022-10-15 16:26:09,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:26:09,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302548530] [2022-10-15 16:26:09,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302548530] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:26:09,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:26:09,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 16:26:09,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204637008] [2022-10-15 16:26:09,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:26:09,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 16:26:09,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:26:09,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 16:26:09,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-15 16:26:09,821 INFO L87 Difference]: Start difference. First operand 115 states and 135 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-15 16:26:09,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:26:09,835 INFO L93 Difference]: Finished difference Result 124 states and 146 transitions. [2022-10-15 16:26:09,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 16:26:09,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2022-10-15 16:26:09,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:26:09,837 INFO L225 Difference]: With dead ends: 124 [2022-10-15 16:26:09,837 INFO L226 Difference]: Without dead ends: 124 [2022-10-15 16:26:09,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-15 16:26:09,838 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 5 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 16:26:09,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 191 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 16:26:09,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-10-15 16:26:09,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2022-10-15 16:26:09,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 97 states have (on average 1.2268041237113403) internal successors, (119), 103 states have internal predecessors, (119), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2022-10-15 16:26:09,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 141 transitions. [2022-10-15 16:26:09,845 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 141 transitions. Word has length 46 [2022-10-15 16:26:09,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:26:09,845 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 141 transitions. [2022-10-15 16:26:09,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-15 16:26:09,846 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 141 transitions. [2022-10-15 16:26:09,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-10-15 16:26:09,847 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:26:09,847 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:26:09,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-10-15 16:26:10,061 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,SelfDestructingSolverStorable10 [2022-10-15 16:26:10,061 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:26:10,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:26:10,062 INFO L85 PathProgramCache]: Analyzing trace with hash 309358823, now seen corresponding path program 1 times [2022-10-15 16:26:10,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:26:10,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549178112] [2022-10-15 16:26:10,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:26:10,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:26:10,075 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:26:10,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [159405599] [2022-10-15 16:26:10,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:26:10,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:26:10,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:26:10,077 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) [2022-10-15 16:26:10,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-15 16:26:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:26:10,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-15 16:26:10,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:26:10,315 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-15 16:26:10,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:26:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-15 16:26:10,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:26:10,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549178112] [2022-10-15 16:26:10,542 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:26:10,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159405599] [2022-10-15 16:26:10,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159405599] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:26:10,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:26:10,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2022-10-15 16:26:10,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345081800] [2022-10-15 16:26:10,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:26:10,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-15 16:26:10,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:26:10,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-15 16:26:10,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-10-15 16:26:10,545 INFO L87 Difference]: Start difference. First operand 119 states and 141 transitions. Second operand has 17 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-10-15 16:26:11,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:26:11,090 INFO L93 Difference]: Finished difference Result 248 states and 284 transitions. [2022-10-15 16:26:11,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-10-15 16:26:11,090 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 46 [2022-10-15 16:26:11,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:26:11,093 INFO L225 Difference]: With dead ends: 248 [2022-10-15 16:26:11,093 INFO L226 Difference]: Without dead ends: 246 [2022-10-15 16:26:11,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2022-10-15 16:26:11,094 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 154 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-15 16:26:11,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 356 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-15 16:26:11,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-10-15 16:26:11,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 172. [2022-10-15 16:26:11,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 141 states have (on average 1.2056737588652482) internal successors, (170), 148 states have internal predecessors, (170), 14 states have call successors, (14), 9 states have call predecessors, (14), 10 states have return successors, (18), 14 states have call predecessors, (18), 14 states have call successors, (18) [2022-10-15 16:26:11,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 202 transitions. [2022-10-15 16:26:11,103 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 202 transitions. Word has length 46 [2022-10-15 16:26:11,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:26:11,104 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 202 transitions. [2022-10-15 16:26:11,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-10-15 16:26:11,104 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 202 transitions. [2022-10-15 16:26:11,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-10-15 16:26:11,105 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:26:11,105 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:26:11,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-10-15 16:26:11,309 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,SelfDestructingSolverStorable11 [2022-10-15 16:26:11,310 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:26:11,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:26:11,311 INFO L85 PathProgramCache]: Analyzing trace with hash 690570421, now seen corresponding path program 2 times [2022-10-15 16:26:11,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:26:11,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539156878] [2022-10-15 16:26:11,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:26:11,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:26:11,327 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:26:11,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1630653685] [2022-10-15 16:26:11,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:26:11,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:26:11,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:26:11,329 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) [2022-10-15 16:26:11,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-10-15 16:26:11,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 16:26:11,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:26:11,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 16:26:11,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:26:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-15 16:26:11,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:26:11,645 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 5 proven. 45 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-15 16:26:11,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:26:11,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539156878] [2022-10-15 16:26:11,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:26:11,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630653685] [2022-10-15 16:26:11,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630653685] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:26:11,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:26:11,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-10-15 16:26:11,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869199226] [2022-10-15 16:26:11,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:26:11,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-15 16:26:11,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:26:11,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-15 16:26:11,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-10-15 16:26:11,648 INFO L87 Difference]: Start difference. First operand 172 states and 202 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-15 16:26:12,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:26:12,147 INFO L93 Difference]: Finished difference Result 241 states and 277 transitions. [2022-10-15 16:26:12,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-15 16:26:12,148 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 52 [2022-10-15 16:26:12,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:26:12,150 INFO L225 Difference]: With dead ends: 241 [2022-10-15 16:26:12,150 INFO L226 Difference]: Without dead ends: 241 [2022-10-15 16:26:12,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2022-10-15 16:26:12,151 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 119 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-15 16:26:12,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 413 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-15 16:26:12,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-10-15 16:26:12,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 199. [2022-10-15 16:26:12,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 168 states have (on average 1.2023809523809523) internal successors, (202), 175 states have internal predecessors, (202), 14 states have call successors, (14), 9 states have call predecessors, (14), 10 states have return successors, (18), 14 states have call predecessors, (18), 14 states have call successors, (18) [2022-10-15 16:26:12,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 234 transitions. [2022-10-15 16:26:12,160 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 234 transitions. Word has length 52 [2022-10-15 16:26:12,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:26:12,161 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 234 transitions. [2022-10-15 16:26:12,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-15 16:26:12,161 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 234 transitions. [2022-10-15 16:26:12,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-10-15 16:26:12,162 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:26:12,162 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1] [2022-10-15 16:26:12,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-10-15 16:26:12,378 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,SelfDestructingSolverStorable12 [2022-10-15 16:26:12,378 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:26:12,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:26:12,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1484042592, now seen corresponding path program 1 times [2022-10-15 16:26:12,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:26:12,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49964643] [2022-10-15 16:26:12,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:26:12,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:26:12,412 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:26:12,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1126192139] [2022-10-15 16:26:12,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:26:12,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:26:12,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:26:12,418 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) [2022-10-15 16:26:12,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-10-15 16:26:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:26:12,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-15 16:26:12,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:26:13,160 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-10-15 16:26:13,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:26:13,670 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 66 treesize of output 60 [2022-10-15 16:26:14,047 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-10-15 16:26:14,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:26:14,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49964643] [2022-10-15 16:26:14,048 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:26:14,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126192139] [2022-10-15 16:26:14,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126192139] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:26:14,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:26:14,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2022-10-15 16:26:14,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312250966] [2022-10-15 16:26:14,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:26:14,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-15 16:26:14,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:26:14,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-15 16:26:14,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-10-15 16:26:14,050 INFO L87 Difference]: Start difference. First operand 199 states and 234 transitions. Second operand has 15 states, 14 states have (on average 5.0) internal successors, (70), 15 states have internal predecessors, (70), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-15 16:26:18,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:26:18,251 INFO L93 Difference]: Finished difference Result 205 states and 238 transitions. [2022-10-15 16:26:18,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-15 16:26:18,252 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 5.0) internal successors, (70), 15 states have internal predecessors, (70), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 61 [2022-10-15 16:26:18,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:26:18,253 INFO L225 Difference]: With dead ends: 205 [2022-10-15 16:26:18,253 INFO L226 Difference]: Without dead ends: 205 [2022-10-15 16:26:18,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 102 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2022-10-15 16:26:18,255 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 192 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-10-15 16:26:18,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 271 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 229 Invalid, 0 Unknown, 25 Unchecked, 3.0s Time] [2022-10-15 16:26:18,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-10-15 16:26:18,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 199. [2022-10-15 16:26:18,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 168 states have (on average 1.1904761904761905) internal successors, (200), 175 states have internal predecessors, (200), 14 states have call successors, (14), 9 states have call predecessors, (14), 10 states have return successors, (18), 14 states have call predecessors, (18), 14 states have call successors, (18) [2022-10-15 16:26:18,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 232 transitions. [2022-10-15 16:26:18,264 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 232 transitions. Word has length 61 [2022-10-15 16:26:18,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:26:18,264 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 232 transitions. [2022-10-15 16:26:18,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 5.0) internal successors, (70), 15 states have internal predecessors, (70), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-15 16:26:18,265 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 232 transitions. [2022-10-15 16:26:18,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-10-15 16:26:18,266 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:26:18,266 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1] [2022-10-15 16:26:18,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-10-15 16:26:18,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:26:18,481 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:26:18,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:26:18,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1239274334, now seen corresponding path program 1 times [2022-10-15 16:26:18,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:26:18,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250265560] [2022-10-15 16:26:18,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:26:18,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:26:18,496 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:26:18,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48074976] [2022-10-15 16:26:18,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:26:18,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:26:18,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:26:18,498 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) [2022-10-15 16:26:18,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-10-15 16:26:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:26:18,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-15 16:26:18,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:26:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-10-15 16:26:18,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:26:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-10-15 16:26:18,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:26:18,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250265560] [2022-10-15 16:26:18,729 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:26:18,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48074976] [2022-10-15 16:26:18,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48074976] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:26:18,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:26:18,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-10-15 16:26:18,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915304535] [2022-10-15 16:26:18,730 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:26:18,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 16:26:18,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:26:18,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 16:26:18,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-10-15 16:26:18,732 INFO L87 Difference]: Start difference. First operand 199 states and 232 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-15 16:26:18,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:26:18,945 INFO L93 Difference]: Finished difference Result 201 states and 233 transitions. [2022-10-15 16:26:18,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-15 16:26:18,945 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 62 [2022-10-15 16:26:18,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:26:18,947 INFO L225 Difference]: With dead ends: 201 [2022-10-15 16:26:18,947 INFO L226 Difference]: Without dead ends: 201 [2022-10-15 16:26:18,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2022-10-15 16:26:18,948 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 164 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:26:18,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 116 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:26:18,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-10-15 16:26:18,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2022-10-15 16:26:18,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 168 states have (on average 1.1845238095238095) internal successors, (199), 175 states have internal predecessors, (199), 14 states have call successors, (14), 9 states have call predecessors, (14), 10 states have return successors, (18), 14 states have call predecessors, (18), 14 states have call successors, (18) [2022-10-15 16:26:18,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 231 transitions. [2022-10-15 16:26:18,957 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 231 transitions. Word has length 62 [2022-10-15 16:26:18,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:26:18,958 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 231 transitions. [2022-10-15 16:26:18,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-15 16:26:18,958 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 231 transitions. [2022-10-15 16:26:18,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-10-15 16:26:18,959 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:26:18,959 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:26:18,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-10-15 16:26:19,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-10-15 16:26:19,160 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:26:19,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:26:19,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1041378348, now seen corresponding path program 3 times [2022-10-15 16:26:19,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:26:19,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251104219] [2022-10-15 16:26:19,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:26:19,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:26:19,175 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:26:19,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180673274] [2022-10-15 16:26:19,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 16:26:19,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:26:19,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:26:19,177 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) [2022-10-15 16:26:19,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-10-15 16:26:20,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-10-15 16:26:20,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:26:20,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 23 conjunts are in the unsatisfiable core [2022-10-15 16:26:20,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:26:20,058 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