/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-crafted/bor5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 16:15:47,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 16:15:47,660 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 16:15:47,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 16:15:47,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 16:15:47,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 16:15:47,744 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 16:15:47,752 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 16:15:47,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 16:15:47,760 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 16:15:47,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 16:15:47,765 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 16:15:47,765 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 16:15:47,766 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 16:15:47,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 16:15:47,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 16:15:47,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 16:15:47,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 16:15:47,775 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 16:15:47,777 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 16:15:47,778 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 16:15:47,780 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 16:15:47,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 16:15:47,782 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 16:15:47,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-15 16:15:47,790 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-15 16:15:47,791 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-15 16:15:47,792 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-15 16:15:47,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-15 16:15:47,794 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-15 16:15:47,794 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-15 16:15:47,795 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-15 16:15:47,795 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-15 16:15:47,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 16:15:47,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 16:15:47,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 16:15:47,801 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 16:15:47,831 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 16:15:47,831 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 16:15:47,831 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 16:15:47,832 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 16:15:47,832 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 16:15:47,833 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 16:15:47,834 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 16:15:47,834 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 16:15:47,834 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 16:15:47,834 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 16:15:47,835 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 16:15:47,835 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 16:15:47,835 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 16:15:47,836 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 16:15:47,836 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 16:15:47,836 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 16:15:47,836 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 16:15:47,837 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 16:15:47,837 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 16:15:47,837 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 16:15:47,837 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 16:15:47,838 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 16:15:47,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 16:15:47,838 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 16:15:47,839 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 16:15:47,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 16:15:47,839 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 16:15:47,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 16:15:47,840 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 16:15:47,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 16:15:47,840 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 16:15:48,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 16:15:48,211 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 16:15:48,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 16:15:48,215 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 16:15:48,216 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 16:15:48,218 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/bor5.i [2022-10-15 16:15:48,282 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a1cc0905/2ff915b8580e4530b9937183e2e5894c/FLAGe842f92b1 [2022-10-15 16:15:48,955 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 16:15:48,956 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bor5.i [2022-10-15 16:15:48,964 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a1cc0905/2ff915b8580e4530b9937183e2e5894c/FLAGe842f92b1 [2022-10-15 16:15:49,310 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a1cc0905/2ff915b8580e4530b9937183e2e5894c [2022-10-15 16:15:49,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 16:15:49,323 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 16:15:49,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 16:15:49,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 16:15:49,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 16:15:49,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:15:49" (1/1) ... [2022-10-15 16:15:49,337 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44b32140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:15:49, skipping insertion in model container [2022-10-15 16:15:49,337 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:15:49" (1/1) ... [2022-10-15 16:15:49,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 16:15:49,373 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 16:15:49,695 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-crafted/bor5.i[1364,1377] [2022-10-15 16:15:49,703 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 16:15:49,720 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 16:15:49,770 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-crafted/bor5.i[1364,1377] [2022-10-15 16:15:49,771 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 16:15:49,793 INFO L208 MainTranslator]: Completed translation [2022-10-15 16:15:49,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:15:49 WrapperNode [2022-10-15 16:15:49,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 16:15:49,795 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 16:15:49,795 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 16:15:49,795 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 16:15:49,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:15:49" (1/1) ... [2022-10-15 16:15:49,814 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:15:49" (1/1) ... [2022-10-15 16:15:49,839 INFO L138 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2022-10-15 16:15:49,839 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 16:15:49,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 16:15:49,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 16:15:49,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 16:15:49,852 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:15:49" (1/1) ... [2022-10-15 16:15:49,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:15:49" (1/1) ... [2022-10-15 16:15:49,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:15:49" (1/1) ... [2022-10-15 16:15:49,856 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:15:49" (1/1) ... [2022-10-15 16:15:49,868 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:15:49" (1/1) ... [2022-10-15 16:15:49,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:15:49" (1/1) ... [2022-10-15 16:15:49,875 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:15:49" (1/1) ... [2022-10-15 16:15:49,877 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:15:49" (1/1) ... [2022-10-15 16:15:49,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 16:15:49,883 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 16:15:49,884 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 16:15:49,884 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 16:15:49,885 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:15:49" (1/1) ... [2022-10-15 16:15:49,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 16:15:49,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:15:49,927 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 16:15:49,953 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 16:15:49,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 16:15:49,998 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2022-10-15 16:15:49,998 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2022-10-15 16:15:49,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 16:15:49,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 16:15:49,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 16:15:49,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 16:15:49,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 16:15:49,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 16:15:49,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 16:15:50,082 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 16:15:50,085 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 16:15:50,724 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 16:15:50,742 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 16:15:50,743 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-15 16:15:50,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:15:50 BoogieIcfgContainer [2022-10-15 16:15:50,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 16:15:50,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 16:15:50,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 16:15:50,764 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 16:15:50,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 04:15:49" (1/3) ... [2022-10-15 16:15:50,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378ef7c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:15:50, skipping insertion in model container [2022-10-15 16:15:50,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:15:49" (2/3) ... [2022-10-15 16:15:50,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378ef7c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:15:50, skipping insertion in model container [2022-10-15 16:15:50,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:15:50" (3/3) ... [2022-10-15 16:15:50,774 INFO L112 eAbstractionObserver]: Analyzing ICFG bor5.i [2022-10-15 16:15:50,798 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 16:15:50,799 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2022-10-15 16:15:50,892 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 16:15:50,902 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;@59ea6f0b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 16:15:50,903 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2022-10-15 16:15:50,911 INFO L276 IsEmpty]: Start isEmpty. Operand has 75 states, 44 states have (on average 1.8636363636363635) internal successors, (82), 70 states have internal predecessors, (82), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 16:15:50,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-15 16:15:50,922 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:15:50,923 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-15 16:15:50,924 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:15:50,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:15:50,934 INFO L85 PathProgramCache]: Analyzing trace with hash 74574879, now seen corresponding path program 1 times [2022-10-15 16:15:50,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:15:50,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713485397] [2022-10-15 16:15:50,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:50,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:15:51,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:51,267 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 16:15:51,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:15:51,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713485397] [2022-10-15 16:15:51,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713485397] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:15:51,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:15:51,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 16:15:51,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097420303] [2022-10-15 16:15:51,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:15:51,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 16:15:51,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:15:51,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 16:15:51,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:15:51,338 INFO L87 Difference]: Start difference. First operand has 75 states, 44 states have (on average 1.8636363636363635) internal successors, (82), 70 states have internal predecessors, (82), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:15:51,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:15:51,492 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2022-10-15 16:15:51,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 16:15:51,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-10-15 16:15:51,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:15:51,508 INFO L225 Difference]: With dead ends: 77 [2022-10-15 16:15:51,509 INFO L226 Difference]: Without dead ends: 73 [2022-10-15 16:15:51,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:15:51,516 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:15:51,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 134 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:15:51,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-10-15 16:15:51,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-10-15 16:15:51,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 43 states have (on average 1.744186046511628) internal successors, (75), 68 states have internal predecessors, (75), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 16:15:51,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2022-10-15 16:15:51,574 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 5 [2022-10-15 16:15:51,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:15:51,575 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2022-10-15 16:15:51,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:15:51,575 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2022-10-15 16:15:51,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-15 16:15:51,576 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:15:51,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-15 16:15:51,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 16:15:51,577 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:15:51,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:15:51,579 INFO L85 PathProgramCache]: Analyzing trace with hash 74500597, now seen corresponding path program 1 times [2022-10-15 16:15:51,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:15:51,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407464758] [2022-10-15 16:15:51,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:51,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:15:51,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:51,887 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 16:15:51,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:15:51,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407464758] [2022-10-15 16:15:51,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407464758] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:15:51,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:15:51,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 16:15:51,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261548097] [2022-10-15 16:15:51,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:15:51,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 16:15:51,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:15:51,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 16:15:51,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 16:15:51,893 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:15:52,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:15:52,047 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2022-10-15 16:15:52,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 16:15:52,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-10-15 16:15:52,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:15:52,050 INFO L225 Difference]: With dead ends: 78 [2022-10-15 16:15:52,050 INFO L226 Difference]: Without dead ends: 78 [2022-10-15 16:15:52,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 16:15:52,053 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 4 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:15:52,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 149 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:15:52,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-10-15 16:15:52,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2022-10-15 16:15:52,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 45 states have (on average 1.7333333333333334) internal successors, (78), 70 states have internal predecessors, (78), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 16:15:52,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2022-10-15 16:15:52,067 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 5 [2022-10-15 16:15:52,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:15:52,067 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2022-10-15 16:15:52,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:15:52,068 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2022-10-15 16:15:52,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-15 16:15:52,069 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:15:52,069 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-15 16:15:52,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 16:15:52,070 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:15:52,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:15:52,071 INFO L85 PathProgramCache]: Analyzing trace with hash 74500596, now seen corresponding path program 1 times [2022-10-15 16:15:52,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:15:52,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508540176] [2022-10-15 16:15:52,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:52,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:15:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:52,126 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 16:15:52,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:15:52,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508540176] [2022-10-15 16:15:52,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508540176] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:15:52,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:15:52,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 16:15:52,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403238134] [2022-10-15 16:15:52,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:15:52,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 16:15:52,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:15:52,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 16:15:52,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:15:52,131 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:15:52,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:15:52,192 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2022-10-15 16:15:52,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 16:15:52,193 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-10-15 16:15:52,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:15:52,194 INFO L225 Difference]: With dead ends: 66 [2022-10-15 16:15:52,194 INFO L226 Difference]: Without dead ends: 66 [2022-10-15 16:15:52,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:15:52,197 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 34 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:15:52,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 73 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:15:52,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-10-15 16:15:52,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-10-15 16:15:52,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 45 states have (on average 1.511111111111111) internal successors, (68), 61 states have internal predecessors, (68), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 16:15:52,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2022-10-15 16:15:52,207 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 5 [2022-10-15 16:15:52,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:15:52,207 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2022-10-15 16:15:52,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:15:52,208 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2022-10-15 16:15:52,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-15 16:15:52,209 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:15:52,209 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:15:52,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-15 16:15:52,210 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:15:52,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:15:52,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1784883128, now seen corresponding path program 1 times [2022-10-15 16:15:52,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:15:52,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312152808] [2022-10-15 16:15:52,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:52,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:15:52,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:52,514 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 16:15:52,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:15:52,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312152808] [2022-10-15 16:15:52,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312152808] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:15:52,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992014612] [2022-10-15 16:15:52,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:52,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:15:52,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:15:52,524 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 16:15:52,532 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 16:15:52,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:52,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-15 16:15:52,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:15:52,733 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 16:15:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:15:52,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:15:52,982 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 16:15:52,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992014612] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:15:52,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:15:52,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-10-15 16:15:52,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312566281] [2022-10-15 16:15:52,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:15:52,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 16:15:52,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:15:52,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 16:15:52,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-10-15 16:15:52,993 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:15:53,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:15:53,246 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2022-10-15 16:15:53,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 16:15:53,247 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-10-15 16:15:53,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:15:53,249 INFO L225 Difference]: With dead ends: 72 [2022-10-15 16:15:53,249 INFO L226 Difference]: Without dead ends: 72 [2022-10-15 16:15:53,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-10-15 16:15:53,251 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 8 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 16:15:53,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 255 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 16:15:53,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-10-15 16:15:53,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2022-10-15 16:15:53,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.469387755102041) internal successors, (72), 65 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 16:15:53,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2022-10-15 16:15:53,261 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 9 [2022-10-15 16:15:53,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:15:53,262 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2022-10-15 16:15:53,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:15:53,262 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2022-10-15 16:15:53,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-15 16:15:53,263 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:15:53,263 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2022-10-15 16:15:53,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-10-15 16:15:53,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:15:53,478 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:15:53,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:15:53,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1332024325, now seen corresponding path program 2 times [2022-10-15 16:15:53,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:15:53,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971501878] [2022-10-15 16:15:53,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:53,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:15:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:15:53,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:15:53,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971501878] [2022-10-15 16:15:53,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971501878] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:15:53,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673283677] [2022-10-15 16:15:53,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:15:53,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:15:53,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:15:53,644 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 16:15:53,647 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 16:15:53,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 16:15:53,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:15:53,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-15 16:15:53,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:15:53,726 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 16:15:53,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:15:53,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:15:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:15:54,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673283677] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:15:54,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:15:54,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-10-15 16:15:54,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720006659] [2022-10-15 16:15:54,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:15:54,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-15 16:15:54,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:15:54,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-15 16:15:54,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-10-15 16:15:54,125 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:15:54,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:15:54,381 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2022-10-15 16:15:54,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 16:15:54,382 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-10-15 16:15:54,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:15:54,383 INFO L225 Difference]: With dead ends: 71 [2022-10-15 16:15:54,384 INFO L226 Difference]: Without dead ends: 71 [2022-10-15 16:15:54,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-10-15 16:15:54,385 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 138 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 16:15:54,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 156 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 16:15:54,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-10-15 16:15:54,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2022-10-15 16:15:54,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 63 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 16:15:54,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2022-10-15 16:15:54,393 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 13 [2022-10-15 16:15:54,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:15:54,393 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2022-10-15 16:15:54,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:15:54,394 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2022-10-15 16:15:54,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-15 16:15:54,395 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:15:54,395 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:15:54,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-10-15 16:15:54,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:15:54,610 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:15:54,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:15:54,611 INFO L85 PathProgramCache]: Analyzing trace with hash -175113466, now seen corresponding path program 1 times [2022-10-15 16:15:54,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:15:54,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546228400] [2022-10-15 16:15:54,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:54,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:15:54,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 16:15:54,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:15:54,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546228400] [2022-10-15 16:15:54,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546228400] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:15:54,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:15:54,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 16:15:54,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553422582] [2022-10-15 16:15:54,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:15:54,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 16:15:54,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:15:54,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 16:15:54,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-15 16:15:54,729 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:15:54,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:15:54,811 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2022-10-15 16:15:54,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 16:15:54,811 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-10-15 16:15:54,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:15:54,812 INFO L225 Difference]: With dead ends: 65 [2022-10-15 16:15:54,812 INFO L226 Difference]: Without dead ends: 65 [2022-10-15 16:15:54,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-15 16:15:54,814 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 72 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:15:54,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 92 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:15:54,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-10-15 16:15:54,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-10-15 16:15:54,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 60 states have internal predecessors, (67), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 16:15:54,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2022-10-15 16:15:54,821 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 15 [2022-10-15 16:15:54,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:15:54,821 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2022-10-15 16:15:54,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:15:54,822 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2022-10-15 16:15:54,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-15 16:15:54,823 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:15:54,823 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:15:54,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-15 16:15:54,824 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:15:54,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:15:54,824 INFO L85 PathProgramCache]: Analyzing trace with hash -175113465, now seen corresponding path program 1 times [2022-10-15 16:15:54,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:15:54,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134948426] [2022-10-15 16:15:54,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:54,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:15:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-15 16:15:54,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:15:54,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134948426] [2022-10-15 16:15:54,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134948426] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:15:54,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:15:54,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 16:15:54,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472439565] [2022-10-15 16:15:54,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:15:54,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 16:15:54,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:15:54,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 16:15:54,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-15 16:15:54,984 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:15:55,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:15:55,070 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2022-10-15 16:15:55,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 16:15:55,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-10-15 16:15:55,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:15:55,071 INFO L225 Difference]: With dead ends: 59 [2022-10-15 16:15:55,071 INFO L226 Difference]: Without dead ends: 59 [2022-10-15 16:15:55,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-15 16:15:55,073 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 65 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:15:55,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 97 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:15:55,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-10-15 16:15:55,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-10-15 16:15:55,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 54 states have internal predecessors, (61), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 16:15:55,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-10-15 16:15:55,080 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 15 [2022-10-15 16:15:55,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:15:55,080 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-10-15 16:15:55,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:15:55,080 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-10-15 16:15:55,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-15 16:15:55,081 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:15:55,081 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:15:55,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-15 16:15:55,082 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting borErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:15:55,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:15:55,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1579973474, now seen corresponding path program 1 times [2022-10-15 16:15:55,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:15:55,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477079743] [2022-10-15 16:15:55,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:55,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:15:55,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-15 16:15:55,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:15:55,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477079743] [2022-10-15 16:15:55,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477079743] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:15:55,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:15:55,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-15 16:15:55,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474015401] [2022-10-15 16:15:55,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:15:55,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 16:15:55,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:15:55,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 16:15:55,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-15 16:15:55,273 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:15:55,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:15:55,393 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2022-10-15 16:15:55,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 16:15:55,394 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-10-15 16:15:55,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:15:55,396 INFO L225 Difference]: With dead ends: 71 [2022-10-15 16:15:55,397 INFO L226 Difference]: Without dead ends: 71 [2022-10-15 16:15:55,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-10-15 16:15:55,398 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 94 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:15:55,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 122 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:15:55,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-10-15 16:15:55,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2022-10-15 16:15:55,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 57 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 16:15:55,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2022-10-15 16:15:55,407 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 18 [2022-10-15 16:15:55,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:15:55,407 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2022-10-15 16:15:55,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:15:55,408 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2022-10-15 16:15:55,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-15 16:15:55,409 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:15:55,409 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:15:55,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-15 16:15:55,409 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting borErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:15:55,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:15:55,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1635600150, now seen corresponding path program 1 times [2022-10-15 16:15:55,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:15:55,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946897669] [2022-10-15 16:15:55,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:55,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:15:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:55,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:15:55,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:15:55,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946897669] [2022-10-15 16:15:55,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946897669] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:15:55,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540856913] [2022-10-15 16:15:55,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:55,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:15:55,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:15:55,529 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 16:15:55,552 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 16:15:55,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:55,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-15 16:15:55,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:15:55,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:15:55,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:15:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:15:55,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540856913] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:15:55,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:15:55,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-10-15 16:15:55,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311854073] [2022-10-15 16:15:55,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:15:55,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-15 16:15:55,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:15:55,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-15 16:15:55,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-10-15 16:15:55,771 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:15:55,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:15:55,924 INFO L93 Difference]: Finished difference Result 118 states and 137 transitions. [2022-10-15 16:15:55,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-15 16:15:55,925 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-10-15 16:15:55,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:15:55,927 INFO L225 Difference]: With dead ends: 118 [2022-10-15 16:15:55,927 INFO L226 Difference]: Without dead ends: 118 [2022-10-15 16:15:55,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-10-15 16:15:55,930 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 102 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:15:55,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 340 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:15:55,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-10-15 16:15:55,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 101. [2022-10-15 16:15:55,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 86 states have (on average 1.2790697674418605) internal successors, (110), 93 states have internal predecessors, (110), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-15 16:15:55,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 122 transitions. [2022-10-15 16:15:55,955 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 122 transitions. Word has length 24 [2022-10-15 16:15:55,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:15:55,955 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 122 transitions. [2022-10-15 16:15:55,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:15:55,956 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 122 transitions. [2022-10-15 16:15:55,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-15 16:15:55,958 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:15:55,958 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:15:56,009 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 16:15:56,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:15:56,172 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting borErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:15:56,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:15:56,173 INFO L85 PathProgramCache]: Analyzing trace with hash -92830137, now seen corresponding path program 2 times [2022-10-15 16:15:56,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:15:56,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728504960] [2022-10-15 16:15:56,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:56,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:15:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:56,446 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-15 16:15:56,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:15:56,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728504960] [2022-10-15 16:15:56,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728504960] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:15:56,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435506522] [2022-10-15 16:15:56,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:15:56,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:15:56,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:15:56,453 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 16:15:56,472 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 16:15:56,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 16:15:56,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:15:56,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-15 16:15:56,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:15:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:15:56,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:15:56,958 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 9 treesize of output 7 [2022-10-15 16:15:57,003 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:15:57,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435506522] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:15:57,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:15:57,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 22 [2022-10-15 16:15:57,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942629064] [2022-10-15 16:15:57,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:15:57,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-10-15 16:15:57,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:15:57,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-10-15 16:15:57,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-10-15 16:15:57,007 INFO L87 Difference]: Start difference. First operand 101 states and 122 transitions. Second operand has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 20 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:15:58,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:15:58,083 INFO L93 Difference]: Finished difference Result 124 states and 151 transitions. [2022-10-15 16:15:58,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-10-15 16:15:58,084 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 20 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-10-15 16:15:58,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:15:58,086 INFO L225 Difference]: With dead ends: 124 [2022-10-15 16:15:58,086 INFO L226 Difference]: Without dead ends: 124 [2022-10-15 16:15:58,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=214, Invalid=1118, Unknown=0, NotChecked=0, Total=1332 [2022-10-15 16:15:58,088 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 358 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-15 16:15:58,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 725 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-15 16:15:58,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-10-15 16:15:58,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 106. [2022-10-15 16:15:58,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 93 states have (on average 1.2580645161290323) internal successors, (117), 98 states have internal predecessors, (117), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-15 16:15:58,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 129 transitions. [2022-10-15 16:15:58,096 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 129 transitions. Word has length 28 [2022-10-15 16:15:58,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:15:58,096 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 129 transitions. [2022-10-15 16:15:58,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 20 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:15:58,096 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 129 transitions. [2022-10-15 16:15:58,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-10-15 16:15:58,098 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:15:58,098 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2022-10-15 16:15:58,136 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 16:15:58,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:15:58,313 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:15:58,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:15:58,314 INFO L85 PathProgramCache]: Analyzing trace with hash 614987776, now seen corresponding path program 1 times [2022-10-15 16:15:58,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:15:58,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908316510] [2022-10-15 16:15:58,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:58,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:15:58,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:58,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-15 16:15:58,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:58,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-10-15 16:15:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-15 16:15:58,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:15:58,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908316510] [2022-10-15 16:15:58,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908316510] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:15:58,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236526621] [2022-10-15 16:15:58,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:58,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:15:58,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:15:58,455 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 16:15:58,482 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 16:15:58,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:58,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-15 16:15:58,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:15:58,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-15 16:15:58,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:15:58,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236526621] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:15:58,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 16:15:58,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-10-15 16:15:58,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559516089] [2022-10-15 16:15:58,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:15:58,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 16:15:58,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:15:58,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 16:15:58,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-15 16:15:58,591 INFO L87 Difference]: Start difference. First operand 106 states and 129 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 16:15:58,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:15:58,636 INFO L93 Difference]: Finished difference Result 106 states and 128 transitions. [2022-10-15 16:15:58,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 16:15:58,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40 [2022-10-15 16:15:58,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:15:58,638 INFO L225 Difference]: With dead ends: 106 [2022-10-15 16:15:58,638 INFO L226 Difference]: Without dead ends: 106 [2022-10-15 16:15:58,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-15 16:15:58,640 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 61 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 16:15:58,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 87 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 16:15:58,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-10-15 16:15:58,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-10-15 16:15:58,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 93 states have (on average 1.2473118279569892) internal successors, (116), 98 states have internal predecessors, (116), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-15 16:15:58,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 128 transitions. [2022-10-15 16:15:58,648 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 128 transitions. Word has length 40 [2022-10-15 16:15:58,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:15:58,648 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 128 transitions. [2022-10-15 16:15:58,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 16:15:58,649 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 128 transitions. [2022-10-15 16:15:58,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-10-15 16:15:58,651 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:15:58,651 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:15:58,681 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 16:15:58,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-10-15 16:15:58,868 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:15:58,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:15:58,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1955949184, now seen corresponding path program 1 times [2022-10-15 16:15:58,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:15:58,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175796841] [2022-10-15 16:15:58,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:58,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:15:58,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:58,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-15 16:15:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:59,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-10-15 16:15:59,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-10-15 16:15:59,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:15:59,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175796841] [2022-10-15 16:15:59,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175796841] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:15:59,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416134249] [2022-10-15 16:15:59,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:59,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:15:59,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:15:59,072 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 16:15:59,111 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 16:15:59,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:59,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-15 16:15:59,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:15:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-10-15 16:15:59,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:15:59,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416134249] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:15:59,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 16:15:59,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 8 [2022-10-15 16:15:59,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924061729] [2022-10-15 16:15:59,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:15:59,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 16:15:59,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:15:59,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 16:15:59,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-10-15 16:15:59,275 INFO L87 Difference]: Start difference. First operand 106 states and 128 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-15 16:15:59,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:15:59,316 INFO L93 Difference]: Finished difference Result 118 states and 142 transitions. [2022-10-15 16:15:59,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 16:15:59,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2022-10-15 16:15:59,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:15:59,318 INFO L225 Difference]: With dead ends: 118 [2022-10-15 16:15:59,319 INFO L226 Difference]: Without dead ends: 118 [2022-10-15 16:15:59,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-10-15 16:15:59,320 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 16:15:59,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 84 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 16:15:59,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-10-15 16:15:59,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 108. [2022-10-15 16:15:59,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 100 states have internal predecessors, (118), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-15 16:15:59,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 130 transitions. [2022-10-15 16:15:59,328 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 130 transitions. Word has length 52 [2022-10-15 16:15:59,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:15:59,328 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 130 transitions. [2022-10-15 16:15:59,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-15 16:15:59,329 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 130 transitions. [2022-10-15 16:15:59,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-10-15 16:15:59,330 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:15:59,330 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:15:59,374 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 16:15:59,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:15:59,545 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:15:59,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:15:59,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1955949134, now seen corresponding path program 1 times [2022-10-15 16:15:59,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:15:59,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423137181] [2022-10-15 16:15:59,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:59,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:15:59,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:59,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-15 16:15:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:59,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-10-15 16:15:59,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-10-15 16:15:59,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:15:59,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423137181] [2022-10-15 16:15:59,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423137181] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:15:59,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:15:59,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-15 16:15:59,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696908560] [2022-10-15 16:15:59,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:15:59,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 16:15:59,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:15:59,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 16:15:59,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-15 16:15:59,816 INFO L87 Difference]: Start difference. First operand 108 states and 130 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-15 16:15:59,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:15:59,894 INFO L93 Difference]: Finished difference Result 136 states and 167 transitions. [2022-10-15 16:15:59,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 16:15:59,894 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2022-10-15 16:15:59,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:15:59,896 INFO L225 Difference]: With dead ends: 136 [2022-10-15 16:15:59,896 INFO L226 Difference]: Without dead ends: 136 [2022-10-15 16:15:59,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-15 16:15:59,897 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 43 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:15:59,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 119 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:15:59,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-10-15 16:15:59,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 111. [2022-10-15 16:15:59,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 99 states have (on average 1.2222222222222223) internal successors, (121), 103 states have internal predecessors, (121), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-15 16:15:59,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 133 transitions. [2022-10-15 16:15:59,906 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 133 transitions. Word has length 52 [2022-10-15 16:15:59,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:15:59,906 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 133 transitions. [2022-10-15 16:15:59,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-15 16:15:59,907 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 133 transitions. [2022-10-15 16:15:59,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-10-15 16:15:59,908 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:15:59,908 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:15:59,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-10-15 16:15:59,909 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:15:59,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:15:59,909 INFO L85 PathProgramCache]: Analyzing trace with hash 2066435613, now seen corresponding path program 1 times [2022-10-15 16:15:59,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:15:59,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378824719] [2022-10-15 16:15:59,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:59,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:15:59,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:16:00,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-15 16:16:00,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:16:00,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-10-15 16:16:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:16:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-10-15 16:16:00,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:16:00,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378824719] [2022-10-15 16:16:00,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378824719] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:16:00,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177567446] [2022-10-15 16:16:00,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:16:00,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:16:00,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:16:00,143 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 16:16:00,151 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 16:16:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:16:00,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-15 16:16:00,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:16:00,346 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-10-15 16:16:00,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:16:00,444 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-10-15 16:16:00,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177567446] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:16:00,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:16:00,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2022-10-15 16:16:00,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361284795] [2022-10-15 16:16:00,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:16:00,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-15 16:16:00,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:16:00,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-15 16:16:00,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-10-15 16:16:00,447 INFO L87 Difference]: Start difference. First operand 111 states and 133 transitions. Second operand has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-15 16:16:00,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:16:00,592 INFO L93 Difference]: Finished difference Result 141 states and 168 transitions. [2022-10-15 16:16:00,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-15 16:16:00,593 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2022-10-15 16:16:00,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:16:00,597 INFO L225 Difference]: With dead ends: 141 [2022-10-15 16:16:00,597 INFO L226 Difference]: Without dead ends: 141 [2022-10-15 16:16:00,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-10-15 16:16:00,598 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 108 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:16:00,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 320 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:16:00,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-10-15 16:16:00,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 109. [2022-10-15 16:16:00,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 97 states have (on average 1.1958762886597938) internal successors, (116), 101 states have internal predecessors, (116), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-15 16:16:00,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 128 transitions. [2022-10-15 16:16:00,608 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 128 transitions. Word has length 57 [2022-10-15 16:16:00,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:16:00,609 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 128 transitions. [2022-10-15 16:16:00,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-15 16:16:00,610 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 128 transitions. [2022-10-15 16:16:00,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-10-15 16:16:00,614 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:16:00,614 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:16:00,658 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 16:16:00,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:16:00,830 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:16:00,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:16:00,831 INFO L85 PathProgramCache]: Analyzing trace with hash -637529940, now seen corresponding path program 1 times [2022-10-15 16:16:00,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:16:00,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106066822] [2022-10-15 16:16:00,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:16:00,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:16:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:16:01,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-15 16:16:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:16:01,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-10-15 16:16:01,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:16:01,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-10-15 16:16:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:16:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-10-15 16:16:01,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:16:01,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106066822] [2022-10-15 16:16:01,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106066822] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:16:01,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939131106] [2022-10-15 16:16:01,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:16:01,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:16:01,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:16:01,954 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 16:16:01,962 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 16:16:02,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:16:02,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 25 conjunts are in the unsatisfiable core [2022-10-15 16:16:02,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:16:02,275 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-10-15 16:16:02,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:16:02,541 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-10-15 16:16:02,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939131106] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:16:02,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:16:02,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 14 [2022-10-15 16:16:02,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724571834] [2022-10-15 16:16:02,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:16:02,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-15 16:16:02,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:16:02,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-15 16:16:02,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-10-15 16:16:02,544 INFO L87 Difference]: Start difference. First operand 109 states and 128 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 9 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-15 16:16:02,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:16:02,709 INFO L93 Difference]: Finished difference Result 245 states and 309 transitions. [2022-10-15 16:16:02,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-15 16:16:02,709 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 9 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 74 [2022-10-15 16:16:02,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:16:02,711 INFO L225 Difference]: With dead ends: 245 [2022-10-15 16:16:02,712 INFO L226 Difference]: Without dead ends: 245 [2022-10-15 16:16:02,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 145 SyntacticMatches, 10 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-10-15 16:16:02,713 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 81 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:16:02,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 755 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:16:02,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-10-15 16:16:02,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 172. [2022-10-15 16:16:02,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 154 states have (on average 1.1688311688311688) internal successors, (180), 159 states have internal predecessors, (180), 10 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2022-10-15 16:16:02,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 210 transitions. [2022-10-15 16:16:02,725 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 210 transitions. Word has length 74 [2022-10-15 16:16:02,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:16:02,725 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 210 transitions. [2022-10-15 16:16:02,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 9 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-15 16:16:02,726 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 210 transitions. [2022-10-15 16:16:02,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-10-15 16:16:02,728 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:16:02,728 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 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] [2022-10-15 16:16:02,771 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 16:16:02,941 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,SelfDestructingSolverStorable14 [2022-10-15 16:16:02,941 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:16:02,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:16:02,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1167027616, now seen corresponding path program 2 times [2022-10-15 16:16:02,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:16:02,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789183978] [2022-10-15 16:16:02,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:16:02,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:16:02,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:16:03,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-15 16:16:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:16:03,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-10-15 16:16:03,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:16:03,402 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-10-15 16:16:03,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:16:03,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789183978] [2022-10-15 16:16:03,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789183978] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:16:03,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417926803] [2022-10-15 16:16:03,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:16:03,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:16:03,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:16:03,404 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 16:16:03,424 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 16:16:03,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 16:16:03,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:16:03,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-15 16:16:03,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:16:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-10-15 16:16:03,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:16:03,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-10-15 16:16:03,888 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-10-15 16:16:03,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417926803] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:16:03,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:16:03,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-10-15 16:16:03,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924363384] [2022-10-15 16:16:03,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:16:03,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-10-15 16:16:03,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:16:03,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-10-15 16:16:03,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-10-15 16:16:03,892 INFO L87 Difference]: Start difference. First operand 172 states and 210 transitions. Second operand has 20 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-15 16:16:04,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:16:04,502 INFO L93 Difference]: Finished difference Result 237 states and 306 transitions. [2022-10-15 16:16:04,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-15 16:16:04,503 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 73 [2022-10-15 16:16:04,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:16:04,505 INFO L225 Difference]: With dead ends: 237 [2022-10-15 16:16:04,506 INFO L226 Difference]: Without dead ends: 237 [2022-10-15 16:16:04,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2022-10-15 16:16:04,507 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 239 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-15 16:16:04,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 397 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-15 16:16:04,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-10-15 16:16:04,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 182. [2022-10-15 16:16:04,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 164 states have (on average 1.170731707317073) internal successors, (192), 169 states have internal predecessors, (192), 10 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2022-10-15 16:16:04,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 222 transitions. [2022-10-15 16:16:04,519 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 222 transitions. Word has length 73 [2022-10-15 16:16:04,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:16:04,520 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 222 transitions. [2022-10-15 16:16:04,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-15 16:16:04,520 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 222 transitions. [2022-10-15 16:16:04,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-10-15 16:16:04,522 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:16:04,522 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2022-10-15 16:16:04,565 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 16:16:04,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-10-15 16:16:04,737 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:16:04,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:16:04,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1875203454, now seen corresponding path program 1 times [2022-10-15 16:16:04,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:16:04,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862545823] [2022-10-15 16:16:04,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:16:04,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:16:04,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:16:07,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-15 16:16:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:16:07,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-10-15 16:16:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:16:08,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-10-15 16:16:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:16:08,844 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 16:16:08,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:16:08,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862545823] [2022-10-15 16:16:08,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862545823] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:16:08,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031362085] [2022-10-15 16:16:08,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:16:08,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:16:08,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:16:08,848 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 16:16:08,854 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 16:16:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:16:08,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 78 conjunts are in the unsatisfiable core [2022-10-15 16:16:08,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:16:09,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-10-15 16:16:10,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:16:10,189 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-15 16:16:10,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 39 [2022-10-15 16:16:10,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:16:10,370 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-15 16:16:10,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 39 [2022-10-15 16:16:11,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:16:11,634 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-15 16:16:11,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 39 [2022-10-15 16:16:11,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:16:11,773 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-15 16:16:11,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 39 [2022-10-15 16:16:13,160 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 16:16:13,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:16:16,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 162 [2022-10-15 16:16:16,530 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-15 16:16:16,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 215 treesize of output 193 [2022-10-15 16:16:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-15 16:16:16,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031362085] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:16:16,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:16:16,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 29, 29] total 93 [2022-10-15 16:16:16,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144927353] [2022-10-15 16:16:16,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:16:16,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-10-15 16:16:16,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:16:16,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-10-15 16:16:16,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=7905, Unknown=0, NotChecked=0, Total=8556 [2022-10-15 16:16:16,892 INFO L87 Difference]: Start difference. First operand 182 states and 222 transitions. Second operand has 93 states, 87 states have (on average 2.2528735632183907) internal successors, (196), 90 states have internal predecessors, (196), 8 states have call successors, (9), 5 states have call predecessors, (9), 9 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9)