/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/reducercommutativity/max05-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-16 02:17:26,699 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-16 02:17:26,701 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-16 02:17:26,735 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-16 02:17:26,736 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-16 02:17:26,737 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-16 02:17:26,739 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-16 02:17:26,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-16 02:17:26,744 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-16 02:17:26,745 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-16 02:17:26,746 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-16 02:17:26,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-16 02:17:26,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-16 02:17:26,750 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-16 02:17:26,754 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-16 02:17:26,756 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-16 02:17:26,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-16 02:17:26,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-16 02:17:26,778 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-16 02:17:26,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-16 02:17:26,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-16 02:17:26,784 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-16 02:17:26,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-16 02:17:26,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-16 02:17:26,791 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-16 02:17:26,802 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-16 02:17:26,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-16 02:17:26,805 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-16 02:17:26,807 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-16 02:17:26,869 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-16 02:17:26,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-16 02:17:26,870 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-16 02:17:26,871 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-16 02:17:26,872 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-16 02:17:26,873 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-16 02:17:26,876 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-16 02:17:26,876 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-16 02:17:26,876 INFO L138 SettingsManager]: * Use SBE=true [2022-10-16 02:17:26,877 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-16 02:17:26,878 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-16 02:17:26,878 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-16 02:17:26,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-16 02:17:26,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-16 02:17:26,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-16 02:17:26,880 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-16 02:17:26,880 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-16 02:17:26,880 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-16 02:17:26,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-16 02:17:26,881 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-16 02:17:26,881 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-16 02:17:26,881 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-16 02:17:26,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-16 02:17:26,882 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-16 02:17:26,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-16 02:17:26,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 02:17:26,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-16 02:17:26,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-16 02:17:26,883 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-16 02:17:26,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-16 02:17:26,884 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-16 02:17:27,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-16 02:17:27,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-16 02:17:27,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-16 02:17:27,359 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-16 02:17:27,360 INFO L275 PluginConnector]: CDTParser initialized [2022-10-16 02:17:27,362 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/max05-1.i [2022-10-16 02:17:27,448 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a50eba05b/2068d053196b4f0fb14b2743315bbb4a/FLAG53df3494e [2022-10-16 02:17:28,086 INFO L306 CDTParser]: Found 1 translation units. [2022-10-16 02:17:28,087 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/max05-1.i [2022-10-16 02:17:28,093 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a50eba05b/2068d053196b4f0fb14b2743315bbb4a/FLAG53df3494e [2022-10-16 02:17:28,460 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a50eba05b/2068d053196b4f0fb14b2743315bbb4a [2022-10-16 02:17:28,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-16 02:17:28,472 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-16 02:17:28,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-16 02:17:28,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-16 02:17:28,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-16 02:17:28,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:17:28" (1/1) ... [2022-10-16 02:17:28,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30af0258 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:28, skipping insertion in model container [2022-10-16 02:17:28,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:17:28" (1/1) ... [2022-10-16 02:17:28,492 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-16 02:17:28,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-16 02:17:28,703 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/reducercommutativity/max05-1.i[1284,1297] [2022-10-16 02:17:28,706 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 02:17:28,716 INFO L203 MainTranslator]: Completed pre-run [2022-10-16 02:17:28,755 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/reducercommutativity/max05-1.i[1284,1297] [2022-10-16 02:17:28,760 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 02:17:28,790 INFO L208 MainTranslator]: Completed translation [2022-10-16 02:17:28,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:28 WrapperNode [2022-10-16 02:17:28,792 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-16 02:17:28,794 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-16 02:17:28,795 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-16 02:17:28,795 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-16 02:17:28,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:28" (1/1) ... [2022-10-16 02:17:28,828 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:28" (1/1) ... [2022-10-16 02:17:28,870 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-10-16 02:17:28,870 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-16 02:17:28,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-16 02:17:28,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-16 02:17:28,872 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-16 02:17:28,886 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:28" (1/1) ... [2022-10-16 02:17:28,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:28" (1/1) ... [2022-10-16 02:17:28,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:28" (1/1) ... [2022-10-16 02:17:28,897 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:28" (1/1) ... [2022-10-16 02:17:28,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:28" (1/1) ... [2022-10-16 02:17:28,929 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:28" (1/1) ... [2022-10-16 02:17:28,941 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:28" (1/1) ... [2022-10-16 02:17:28,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:28" (1/1) ... [2022-10-16 02:17:28,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-16 02:17:28,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-16 02:17:28,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-16 02:17:28,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-16 02:17:28,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:28" (1/1) ... [2022-10-16 02:17:28,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 02:17:28,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:17:29,005 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-16 02:17:29,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-16 02:17:29,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-16 02:17:29,082 INFO L130 BoogieDeclarations]: Found specification of procedure max [2022-10-16 02:17:29,083 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2022-10-16 02:17:29,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-16 02:17:29,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-16 02:17:29,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-16 02:17:29,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-16 02:17:29,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-16 02:17:29,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-16 02:17:29,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-16 02:17:29,171 INFO L235 CfgBuilder]: Building ICFG [2022-10-16 02:17:29,174 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-16 02:17:29,500 INFO L276 CfgBuilder]: Performing block encoding [2022-10-16 02:17:29,509 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-16 02:17:29,509 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-16 02:17:29,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:17:29 BoogieIcfgContainer [2022-10-16 02:17:29,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-16 02:17:29,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-16 02:17:29,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-16 02:17:29,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-16 02:17:29,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:17:28" (1/3) ... [2022-10-16 02:17:29,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67c5a7e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:17:29, skipping insertion in model container [2022-10-16 02:17:29,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:28" (2/3) ... [2022-10-16 02:17:29,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67c5a7e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:17:29, skipping insertion in model container [2022-10-16 02:17:29,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:17:29" (3/3) ... [2022-10-16 02:17:29,523 INFO L112 eAbstractionObserver]: Analyzing ICFG max05-1.i [2022-10-16 02:17:29,548 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-16 02:17:29,549 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2022-10-16 02:17:29,654 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-16 02:17:29,670 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;@834d89a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-16 02:17:29,671 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2022-10-16 02:17:29,688 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 62 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) [2022-10-16 02:17:29,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 02:17:29,705 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:17:29,706 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 02:17:29,708 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:17:29,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:17:29,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1849285, now seen corresponding path program 1 times [2022-10-16 02:17:29,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:17:29,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032099843] [2022-10-16 02:17:29,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:17:29,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:17:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:30,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:17:30,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:17:30,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032099843] [2022-10-16 02:17:30,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032099843] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:17:30,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 02:17:30,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 02:17:30,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41860679] [2022-10-16 02:17:30,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:17:30,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 02:17:30,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:17:30,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 02:17:30,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 02:17:30,122 INFO L87 Difference]: Start difference. First operand has 67 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 62 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) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:17:30,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:17:30,218 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2022-10-16 02:17:30,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 02:17:30,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-16 02:17:30,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:17:30,243 INFO L225 Difference]: With dead ends: 58 [2022-10-16 02:17:30,243 INFO L226 Difference]: Without dead ends: 56 [2022-10-16 02:17:30,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 02:17:30,254 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 34 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:17:30,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 57 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:17:30,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-10-16 02:17:30,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-10-16 02:17:30,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 51 states have internal predecessors, (55), 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) [2022-10-16 02:17:30,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-10-16 02:17:30,304 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 4 [2022-10-16 02:17:30,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:17:30,305 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-10-16 02:17:30,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:17:30,305 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-10-16 02:17:30,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 02:17:30,306 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:17:30,306 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 02:17:30,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-16 02:17:30,307 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:17:30,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:17:30,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1849286, now seen corresponding path program 1 times [2022-10-16 02:17:30,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:17:30,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126740034] [2022-10-16 02:17:30,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:17:30,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:17:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:17:30,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:17:30,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126740034] [2022-10-16 02:17:30,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126740034] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:17:30,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 02:17:30,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 02:17:30,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993656710] [2022-10-16 02:17:30,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:17:30,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 02:17:30,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:17:30,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 02:17:30,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 02:17:30,465 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:17:30,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:17:30,595 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-10-16 02:17:30,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 02:17:30,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-16 02:17:30,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:17:30,598 INFO L225 Difference]: With dead ends: 60 [2022-10-16 02:17:30,598 INFO L226 Difference]: Without dead ends: 60 [2022-10-16 02:17:30,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 02:17:30,601 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 2 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:17:30,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 88 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:17:30,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-10-16 02:17:30,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2022-10-16 02:17:30,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 53 states have internal predecessors, (57), 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) [2022-10-16 02:17:30,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2022-10-16 02:17:30,614 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 4 [2022-10-16 02:17:30,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:17:30,615 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2022-10-16 02:17:30,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:17:30,615 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2022-10-16 02:17:30,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-16 02:17:30,616 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:17:30,616 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-10-16 02:17:30,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-16 02:17:30,617 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:17:30,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:17:30,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1543018551, now seen corresponding path program 1 times [2022-10-16 02:17:30,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:17:30,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144650721] [2022-10-16 02:17:30,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:17:30,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:17:30,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:30,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:17:30,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:17:30,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144650721] [2022-10-16 02:17:30,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144650721] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:17:30,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692565997] [2022-10-16 02:17:30,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:17:30,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:17:30,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:17:30,883 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:17:30,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-16 02:17:30,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:30,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-16 02:17:30,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:17:31,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 02:17:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:17:31,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:17:31,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:17:31,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692565997] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:17:31,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:17:31,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-10-16 02:17:31,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710615818] [2022-10-16 02:17:31,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:17:31,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 02:17:31,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:17:31,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 02:17:31,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-16 02:17:31,375 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:17:31,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:17:31,698 INFO L93 Difference]: Finished difference Result 134 states and 149 transitions. [2022-10-16 02:17:31,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 02:17:31,699 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-10-16 02:17:31,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:17:31,702 INFO L225 Difference]: With dead ends: 134 [2022-10-16 02:17:31,702 INFO L226 Difference]: Without dead ends: 134 [2022-10-16 02:17:31,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-10-16 02:17:31,704 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 100 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 02:17:31,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 164 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-16 02:17:31,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-10-16 02:17:31,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 70. [2022-10-16 02:17:31,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.392156862745098) internal successors, (71), 65 states have internal predecessors, (71), 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) [2022-10-16 02:17:31,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2022-10-16 02:17:31,721 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 8 [2022-10-16 02:17:31,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:17:31,721 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2022-10-16 02:17:31,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:17:31,722 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2022-10-16 02:17:31,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-16 02:17:31,723 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:17:31,723 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:17:31,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-16 02:17:31,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:17:31,937 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:17:31,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:17:31,939 INFO L85 PathProgramCache]: Analyzing trace with hash -678742767, now seen corresponding path program 1 times [2022-10-16 02:17:31,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:17:31,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117146996] [2022-10-16 02:17:31,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:17:31,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:17:31,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:32,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-16 02:17:32,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:17:32,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117146996] [2022-10-16 02:17:32,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117146996] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:17:32,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 02:17:32,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 02:17:32,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899493641] [2022-10-16 02:17:32,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:17:32,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 02:17:32,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:17:32,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 02:17:32,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-16 02:17:32,145 INFO L87 Difference]: Start difference. First operand 70 states and 77 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) [2022-10-16 02:17:32,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:17:32,254 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2022-10-16 02:17:32,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 02:17:32,255 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 [2022-10-16 02:17:32,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:17:32,258 INFO L225 Difference]: With dead ends: 68 [2022-10-16 02:17:32,258 INFO L226 Difference]: Without dead ends: 68 [2022-10-16 02:17:32,263 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 [2022-10-16 02:17:32,270 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 56 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:17:32,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 75 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:17:32,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-10-16 02:17:32,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-10-16 02:17:32,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 63 states have internal predecessors, (69), 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) [2022-10-16 02:17:32,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2022-10-16 02:17:32,288 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 15 [2022-10-16 02:17:32,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:17:32,292 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2022-10-16 02:17:32,292 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) [2022-10-16 02:17:32,292 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2022-10-16 02:17:32,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-16 02:17:32,293 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:17:32,293 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:17:32,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-16 02:17:32,294 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:17:32,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:17:32,294 INFO L85 PathProgramCache]: Analyzing trace with hash -678742766, now seen corresponding path program 1 times [2022-10-16 02:17:32,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:17:32,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280862996] [2022-10-16 02:17:32,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:17:32,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:17:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:17:32,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:17:32,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280862996] [2022-10-16 02:17:32,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280862996] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:17:32,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934652889] [2022-10-16 02:17:32,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:17:32,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:17:32,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:17:32,389 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:17:32,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-16 02:17:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:32,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-16 02:17:32,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:17:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:17:32,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:17:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:17:32,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934652889] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:17:32,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:17:32,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-10-16 02:17:32,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998595553] [2022-10-16 02:17:32,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:17:32,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 02:17:32,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:17:32,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 02:17:32,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-10-16 02:17:32,521 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 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) [2022-10-16 02:17:32,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:17:32,557 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2022-10-16 02:17:32,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 02:17:32,557 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 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 [2022-10-16 02:17:32,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:17:32,558 INFO L225 Difference]: With dead ends: 71 [2022-10-16 02:17:32,559 INFO L226 Difference]: Without dead ends: 71 [2022-10-16 02:17:32,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-10-16 02:17:32,560 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 16 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 02:17:32,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 216 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 02:17:32,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-10-16 02:17:32,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-10-16 02:17:32,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 66 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) [2022-10-16 02:17:32,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2022-10-16 02:17:32,568 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 15 [2022-10-16 02:17:32,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:17:32,568 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2022-10-16 02:17:32,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 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) [2022-10-16 02:17:32,569 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2022-10-16 02:17:32,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-16 02:17:32,569 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:17:32,570 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2022-10-16 02:17:32,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-16 02:17:32,775 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 [2022-10-16 02:17:32,776 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:17:32,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:17:32,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1850106158, now seen corresponding path program 2 times [2022-10-16 02:17:32,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:17:32,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73781762] [2022-10-16 02:17:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:17:32,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:17:32,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:33,050 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:17:33,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:17:33,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73781762] [2022-10-16 02:17:33,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73781762] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:17:33,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35173529] [2022-10-16 02:17:33,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 02:17:33,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:17:33,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:17:33,053 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:17:33,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-16 02:17:33,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 02:17:33,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 02:17:33,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-16 02:17:33,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:17:33,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 02:17:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:17:33,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 02:17:33,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35173529] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:17:33,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 02:17:33,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2022-10-16 02:17:33,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309215349] [2022-10-16 02:17:33,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:17:33,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 02:17:33,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:17:33,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 02:17:33,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-10-16 02:17:33,405 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:17:33,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:17:33,512 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2022-10-16 02:17:33,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 02:17:33,513 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-10-16 02:17:33,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:17:33,514 INFO L225 Difference]: With dead ends: 64 [2022-10-16 02:17:33,514 INFO L226 Difference]: Without dead ends: 64 [2022-10-16 02:17:33,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-10-16 02:17:33,516 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 53 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:17:33,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 94 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:17:33,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-10-16 02:17:33,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-10-16 02:17:33,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 59 states have internal predecessors, (63), 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) [2022-10-16 02:17:33,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2022-10-16 02:17:33,523 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 20 [2022-10-16 02:17:33,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:17:33,523 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2022-10-16 02:17:33,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:17:33,524 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2022-10-16 02:17:33,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-16 02:17:33,525 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:17:33,525 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:17:33,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-16 02:17:33,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:17:33,741 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:17:33,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:17:33,742 INFO L85 PathProgramCache]: Analyzing trace with hash -2060996119, now seen corresponding path program 2 times [2022-10-16 02:17:33,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:17:33,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169461638] [2022-10-16 02:17:33,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:17:33,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:17:33,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:33,937 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-10-16 02:17:33,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:17:33,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169461638] [2022-10-16 02:17:33,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169461638] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:17:33,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 02:17:33,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 02:17:33,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056822233] [2022-10-16 02:17:33,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:17:33,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 02:17:33,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:17:33,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 02:17:33,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-16 02:17:33,940 INFO L87 Difference]: Start difference. First operand 64 states and 69 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) [2022-10-16 02:17:34,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:17:34,033 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2022-10-16 02:17:34,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 02:17:34,034 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 27 [2022-10-16 02:17:34,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:17:34,035 INFO L225 Difference]: With dead ends: 71 [2022-10-16 02:17:34,035 INFO L226 Difference]: Without dead ends: 71 [2022-10-16 02:17:34,035 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 [2022-10-16 02:17:34,036 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 50 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 80 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 [2022-10-16 02:17:34,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 80 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:17:34,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-10-16 02:17:34,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2022-10-16 02:17:34,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 63 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) [2022-10-16 02:17:34,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2022-10-16 02:17:34,042 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 27 [2022-10-16 02:17:34,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:17:34,043 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2022-10-16 02:17:34,043 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) [2022-10-16 02:17:34,043 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2022-10-16 02:17:34,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-10-16 02:17:34,045 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:17:34,045 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:17:34,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-16 02:17:34,045 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:17:34,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:17:34,046 INFO L85 PathProgramCache]: Analyzing trace with hash 810719186, now seen corresponding path program 1 times [2022-10-16 02:17:34,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:17:34,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757942155] [2022-10-16 02:17:34,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:17:34,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:17:34,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:34,275 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-10-16 02:17:34,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:17:34,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757942155] [2022-10-16 02:17:34,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757942155] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:17:34,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168763607] [2022-10-16 02:17:34,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:17:34,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:17:34,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:17:34,278 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:17:34,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-16 02:17:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:34,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-16 02:17:34,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:17:34,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 02:17:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-10-16 02:17:34,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:17:34,761 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-10-16 02:17:34,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168763607] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:17:34,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:17:34,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2022-10-16 02:17:34,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921872646] [2022-10-16 02:17:34,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:17:34,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-16 02:17:34,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:17:34,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-16 02:17:34,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-10-16 02:17:34,764 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 12 states have internal predecessors, (43), 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) [2022-10-16 02:17:34,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:17:34,995 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2022-10-16 02:17:34,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-16 02:17:34,996 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 12 states have internal predecessors, (43), 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 32 [2022-10-16 02:17:34,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:17:34,997 INFO L225 Difference]: With dead ends: 84 [2022-10-16 02:17:34,997 INFO L226 Difference]: Without dead ends: 84 [2022-10-16 02:17:34,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2022-10-16 02:17:34,998 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 167 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:17:34,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 158 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:17:35,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-10-16 02:17:35,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-10-16 02:17:35,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 76 states have (on average 1.131578947368421) internal successors, (86), 79 states have internal predecessors, (86), 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) [2022-10-16 02:17:35,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2022-10-16 02:17:35,018 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 32 [2022-10-16 02:17:35,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:17:35,018 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2022-10-16 02:17:35,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 12 states have internal predecessors, (43), 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) [2022-10-16 02:17:35,018 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2022-10-16 02:17:35,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-10-16 02:17:35,026 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:17:35,030 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:17:35,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-16 02:17:35,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:17:35,245 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:17:35,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:17:35,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1277144893, now seen corresponding path program 1 times [2022-10-16 02:17:35,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:17:35,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567410487] [2022-10-16 02:17:35,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:17:35,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:17:35,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:35,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-16 02:17:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:35,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-10-16 02:17:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:35,539 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-10-16 02:17:35,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:17:35,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567410487] [2022-10-16 02:17:35,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567410487] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:17:35,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 02:17:35,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 02:17:35,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231271558] [2022-10-16 02:17:35,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:17:35,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 02:17:35,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:17:35,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 02:17:35,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-16 02:17:35,543 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 02:17:35,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:17:35,604 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2022-10-16 02:17:35,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 02:17:35,605 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 87 [2022-10-16 02:17:35,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:17:35,606 INFO L225 Difference]: With dead ends: 89 [2022-10-16 02:17:35,606 INFO L226 Difference]: Without dead ends: 89 [2022-10-16 02:17:35,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-16 02:17:35,608 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 35 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:17:35,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 74 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:17:35,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-10-16 02:17:35,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2022-10-16 02:17:35,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 79 states have (on average 1.1265822784810127) internal successors, (89), 82 states have internal predecessors, (89), 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) [2022-10-16 02:17:35,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2022-10-16 02:17:35,613 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 87 [2022-10-16 02:17:35,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:17:35,614 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2022-10-16 02:17:35,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 02:17:35,614 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2022-10-16 02:17:35,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-10-16 02:17:35,615 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:17:35,616 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 5, 5, 5, 5, 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] [2022-10-16 02:17:35,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-16 02:17:35,616 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:17:35,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:17:35,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1981609257, now seen corresponding path program 1 times [2022-10-16 02:17:35,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:17:35,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899121501] [2022-10-16 02:17:35,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:17:35,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:17:35,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:35,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-16 02:17:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:35,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-10-16 02:17:35,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:35,853 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-10-16 02:17:35,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:17:35,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899121501] [2022-10-16 02:17:35,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899121501] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:17:35,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377176081] [2022-10-16 02:17:35,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:17:35,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:17:35,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:17:35,856 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:17:35,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-16 02:17:35,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:35,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-16 02:17:35,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:17:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 90 proven. 34 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-10-16 02:17:35,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:17:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-10-16 02:17:36,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377176081] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:17:36,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:17:36,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2022-10-16 02:17:36,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062195612] [2022-10-16 02:17:36,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:17:36,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 02:17:36,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:17:36,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 02:17:36,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-10-16 02:17:36,093 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-16 02:17:36,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:17:36,131 INFO L93 Difference]: Finished difference Result 94 states and 103 transitions. [2022-10-16 02:17:36,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 02:17:36,132 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 92 [2022-10-16 02:17:36,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:17:36,135 INFO L225 Difference]: With dead ends: 94 [2022-10-16 02:17:36,135 INFO L226 Difference]: Without dead ends: 94 [2022-10-16 02:17:36,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 183 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-10-16 02:17:36,136 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 44 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 02:17:36,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 182 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 02:17:36,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-10-16 02:17:36,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-10-16 02:17:36,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 86 states have (on average 1.127906976744186) internal successors, (97), 89 states have internal predecessors, (97), 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) [2022-10-16 02:17:36,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2022-10-16 02:17:36,146 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 92 [2022-10-16 02:17:36,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:17:36,146 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2022-10-16 02:17:36,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-16 02:17:36,147 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2022-10-16 02:17:36,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-10-16 02:17:36,151 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:17:36,151 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 5, 5, 5, 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] [2022-10-16 02:17:36,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-16 02:17:36,368 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,SelfDestructingSolverStorable9 [2022-10-16 02:17:36,369 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:17:36,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:17:36,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1745406531, now seen corresponding path program 2 times [2022-10-16 02:17:36,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:17:36,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643930390] [2022-10-16 02:17:36,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:17:36,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:17:36,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:36,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-16 02:17:36,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:36,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-10-16 02:17:36,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:36,826 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-10-16 02:17:36,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:17:36,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643930390] [2022-10-16 02:17:36,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643930390] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:17:36,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810000902] [2022-10-16 02:17:36,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 02:17:36,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:17:36,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:17:36,829 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:17:36,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-16 02:17:36,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 02:17:36,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 02:17:36,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-16 02:17:36,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:17:36,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 02:17:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-10-16 02:17:37,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 02:17:37,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810000902] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:17:37,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 02:17:37,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 8 [2022-10-16 02:17:37,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425622166] [2022-10-16 02:17:37,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:17:37,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 02:17:37,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:17:37,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 02:17:37,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-10-16 02:17:37,425 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 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) [2022-10-16 02:17:37,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:17:37,494 INFO L93 Difference]: Finished difference Result 157 states and 176 transitions. [2022-10-16 02:17:37,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 02:17:37,495 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 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 102 [2022-10-16 02:17:37,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:17:37,498 INFO L225 Difference]: With dead ends: 157 [2022-10-16 02:17:37,498 INFO L226 Difference]: Without dead ends: 157 [2022-10-16 02:17:37,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-10-16 02:17:37,500 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 36 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:17:37,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 140 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2022-10-16 02:17:37,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-10-16 02:17:37,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 141. [2022-10-16 02:17:37,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 133 states have internal predecessors, (149), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-10-16 02:17:37,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 159 transitions. [2022-10-16 02:17:37,506 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 159 transitions. Word has length 102 [2022-10-16 02:17:37,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:17:37,507 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 159 transitions. [2022-10-16 02:17:37,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 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) [2022-10-16 02:17:37,507 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 159 transitions. [2022-10-16 02:17:37,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-10-16 02:17:37,509 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:17:37,509 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 5, 5, 5, 5, 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] [2022-10-16 02:17:37,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-16 02:17:37,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:17:37,724 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:17:37,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:17:37,725 INFO L85 PathProgramCache]: Analyzing trace with hash -385444070, now seen corresponding path program 1 times [2022-10-16 02:17:37,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:17:37,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983914930] [2022-10-16 02:17:37,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:17:37,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:17:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:38,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-16 02:17:38,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:38,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-10-16 02:17:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:38,080 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-10-16 02:17:38,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:17:38,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983914930] [2022-10-16 02:17:38,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983914930] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:17:38,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478648259] [2022-10-16 02:17:38,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:17:38,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:17:38,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:17:38,083 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:17:38,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-16 02:17:38,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:38,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-16 02:17:38,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:17:38,635 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 32 proven. 15 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-10-16 02:17:38,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:17:38,793 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 25 treesize of output 21 [2022-10-16 02:17:38,980 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 32 proven. 15 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-10-16 02:17:38,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478648259] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:17:38,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:17:38,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 10, 9] total 21 [2022-10-16 02:17:38,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895305696] [2022-10-16 02:17:38,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:17:38,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-10-16 02:17:38,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:17:38,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-10-16 02:17:38,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-10-16 02:17:38,983 INFO L87 Difference]: Start difference. First operand 141 states and 159 transitions. Second operand has 22 states, 21 states have (on average 6.0) internal successors, (126), 22 states have internal predecessors, (126), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-16 02:17:39,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:17:39,375 INFO L93 Difference]: Finished difference Result 225 states and 255 transitions. [2022-10-16 02:17:39,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-16 02:17:39,376 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 6.0) internal successors, (126), 22 states have internal predecessors, (126), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 104 [2022-10-16 02:17:39,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:17:39,378 INFO L225 Difference]: With dead ends: 225 [2022-10-16 02:17:39,378 INFO L226 Difference]: Without dead ends: 225 [2022-10-16 02:17:39,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 195 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2022-10-16 02:17:39,380 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 160 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 02:17:39,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 232 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 309 Invalid, 0 Unknown, 16 Unchecked, 0.2s Time] [2022-10-16 02:17:39,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-10-16 02:17:39,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 200. [2022-10-16 02:17:39,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 189 states have (on average 1.1428571428571428) internal successors, (216), 191 states have internal predecessors, (216), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-10-16 02:17:39,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 226 transitions. [2022-10-16 02:17:39,387 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 226 transitions. Word has length 104 [2022-10-16 02:17:39,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:17:39,388 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 226 transitions. [2022-10-16 02:17:39,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 6.0) internal successors, (126), 22 states have internal predecessors, (126), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-16 02:17:39,388 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 226 transitions. [2022-10-16 02:17:39,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-10-16 02:17:39,390 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:17:39,390 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 5, 5, 5, 5, 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] [2022-10-16 02:17:39,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-16 02:17:39,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:17:39,605 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:17:39,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:17:39,606 INFO L85 PathProgramCache]: Analyzing trace with hash -510248649, now seen corresponding path program 1 times [2022-10-16 02:17:39,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:17:39,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873222721] [2022-10-16 02:17:39,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:17:39,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:17:39,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:39,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-16 02:17:39,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:39,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-10-16 02:17:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-10-16 02:17:39,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:17:39,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873222721] [2022-10-16 02:17:39,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873222721] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:17:39,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722620736] [2022-10-16 02:17:39,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:17:39,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:17:39,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:17:39,884 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:17:39,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-16 02:17:40,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:40,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-16 02:17:40,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:17:40,151 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-10-16 02:17:40,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 02:17:40,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722620736] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:17:40,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 02:17:40,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2022-10-16 02:17:40,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496928546] [2022-10-16 02:17:40,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:17:40,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 02:17:40,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:17:40,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 02:17:40,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-10-16 02:17:40,154 INFO L87 Difference]: Start difference. First operand 200 states and 226 transitions. Second operand has 7 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 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) [2022-10-16 02:17:40,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:17:40,255 INFO L93 Difference]: Finished difference Result 203 states and 228 transitions. [2022-10-16 02:17:40,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 02:17:40,255 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 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 110 [2022-10-16 02:17:40,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:17:40,258 INFO L225 Difference]: With dead ends: 203 [2022-10-16 02:17:40,258 INFO L226 Difference]: Without dead ends: 203 [2022-10-16 02:17:40,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-10-16 02:17:40,259 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 22 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:17:40,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 102 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:17:40,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-10-16 02:17:40,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2022-10-16 02:17:40,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 189 states have (on average 1.1322751322751323) internal successors, (214), 190 states have internal predecessors, (214), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-10-16 02:17:40,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 224 transitions. [2022-10-16 02:17:40,267 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 224 transitions. Word has length 110 [2022-10-16 02:17:40,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:17:40,268 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 224 transitions. [2022-10-16 02:17:40,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 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) [2022-10-16 02:17:40,268 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 224 transitions. [2022-10-16 02:17:40,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-10-16 02:17:40,270 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:17:40,270 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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] [2022-10-16 02:17:40,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-16 02:17:40,484 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,SelfDestructingSolverStorable12 [2022-10-16 02:17:40,484 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:17:40,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:17:40,485 INFO L85 PathProgramCache]: Analyzing trace with hash -650309856, now seen corresponding path program 2 times [2022-10-16 02:17:40,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:17:40,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128467822] [2022-10-16 02:17:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:17:40,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:17:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:40,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-16 02:17:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:40,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-10-16 02:17:40,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:40,923 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 22 proven. 16 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-10-16 02:17:40,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:17:40,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128467822] [2022-10-16 02:17:40,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128467822] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:17:40,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370499322] [2022-10-16 02:17:40,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 02:17:40,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:17:40,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:17:40,925 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:17:40,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-16 02:17:41,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 02:17:41,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 02:17:41,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-16 02:17:41,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:17:41,104 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-10-16 02:17:41,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 02:17:41,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370499322] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:17:41,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 02:17:41,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-10-16 02:17:41,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628853302] [2022-10-16 02:17:41,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:17:41,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 02:17:41,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:17:41,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 02:17:41,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-10-16 02:17:41,107 INFO L87 Difference]: Start difference. First operand 199 states and 224 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 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) [2022-10-16 02:17:41,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:17:41,145 INFO L93 Difference]: Finished difference Result 207 states and 232 transitions. [2022-10-16 02:17:41,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 02:17:41,145 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 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 119 [2022-10-16 02:17:41,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:17:41,147 INFO L225 Difference]: With dead ends: 207 [2022-10-16 02:17:41,147 INFO L226 Difference]: Without dead ends: 207 [2022-10-16 02:17:41,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-10-16 02:17:41,148 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 14 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 02:17:41,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 181 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 02:17:41,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-10-16 02:17:41,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2022-10-16 02:17:41,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 138 states have (on average 1.1159420289855073) internal successors, (154), 139 states have internal predecessors, (154), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:17:41,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 160 transitions. [2022-10-16 02:17:41,154 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 160 transitions. Word has length 119 [2022-10-16 02:17:41,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:17:41,154 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 160 transitions. [2022-10-16 02:17:41,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 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) [2022-10-16 02:17:41,155 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 160 transitions. [2022-10-16 02:17:41,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-10-16 02:17:41,156 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:17:41,156 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 5, 5, 5, 5, 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] [2022-10-16 02:17:41,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-16 02:17:41,372 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,SelfDestructingSolverStorable13 [2022-10-16 02:17:41,373 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:17:41,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:17:41,374 INFO L85 PathProgramCache]: Analyzing trace with hash 282327767, now seen corresponding path program 1 times [2022-10-16 02:17:41,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:17:41,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265163016] [2022-10-16 02:17:41,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:17:41,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:17:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:41,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-16 02:17:41,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:41,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-10-16 02:17:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:41,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-10-16 02:17:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2022-10-16 02:17:41,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:17:41,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265163016] [2022-10-16 02:17:41,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265163016] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:17:41,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193944591] [2022-10-16 02:17:41,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:17:41,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:17:41,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:17:41,576 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:17:41,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-16 02:17:41,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:41,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-16 02:17:41,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:17:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 280 proven. 7 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2022-10-16 02:17:41,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:17:41,769 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2022-10-16 02:17:41,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193944591] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:17:41,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:17:41,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-10-16 02:17:41,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308659648] [2022-10-16 02:17:41,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:17:41,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 02:17:41,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:17:41,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 02:17:41,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-10-16 02:17:41,771 INFO L87 Difference]: Start difference. First operand 145 states and 160 transitions. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 02:17:41,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:17:41,797 INFO L93 Difference]: Finished difference Result 145 states and 158 transitions. [2022-10-16 02:17:41,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 02:17:41,797 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 141 [2022-10-16 02:17:41,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:17:41,798 INFO L225 Difference]: With dead ends: 145 [2022-10-16 02:17:41,798 INFO L226 Difference]: Without dead ends: 145 [2022-10-16 02:17:41,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 284 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-10-16 02:17:41,800 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 16 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 02:17:41,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 128 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 02:17:41,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-10-16 02:17:41,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-10-16 02:17:41,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 138 states have (on average 1.1014492753623188) internal successors, (152), 139 states have internal predecessors, (152), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:17:41,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 158 transitions. [2022-10-16 02:17:41,804 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 158 transitions. Word has length 141 [2022-10-16 02:17:41,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:17:41,805 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 158 transitions. [2022-10-16 02:17:41,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 02:17:41,805 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 158 transitions. [2022-10-16 02:17:41,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-10-16 02:17:41,807 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:17:41,807 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:17:41,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-16 02:17:42,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-10-16 02:17:42,023 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:17:42,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:17:42,024 INFO L85 PathProgramCache]: Analyzing trace with hash 371834583, now seen corresponding path program 2 times [2022-10-16 02:17:42,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:17:42,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845481776] [2022-10-16 02:17:42,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:17:42,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:17:42,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:43,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-16 02:17:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:43,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-10-16 02:17:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:44,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-10-16 02:17:44,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:44,437 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2022-10-16 02:17:44,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:17:44,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845481776] [2022-10-16 02:17:44,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845481776] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:17:44,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 02:17:44,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-10-16 02:17:44,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293780245] [2022-10-16 02:17:44,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:17:44,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-16 02:17:44,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:17:44,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-16 02:17:44,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-10-16 02:17:44,439 INFO L87 Difference]: Start difference. First operand 145 states and 158 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 8 states have internal predecessors, (36), 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) [2022-10-16 02:17:44,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:17:44,561 INFO L93 Difference]: Finished difference Result 294 states and 323 transitions. [2022-10-16 02:17:44,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-16 02:17:44,561 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 8 states have internal predecessors, (36), 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) Word has length 151 [2022-10-16 02:17:44,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:17:44,563 INFO L225 Difference]: With dead ends: 294 [2022-10-16 02:17:44,564 INFO L226 Difference]: Without dead ends: 294 [2022-10-16 02:17:44,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-10-16 02:17:44,565 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 48 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:17:44,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 437 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:17:44,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-10-16 02:17:44,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 233. [2022-10-16 02:17:44,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 222 states have (on average 1.1081081081081081) internal successors, (246), 224 states have internal predecessors, (246), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-10-16 02:17:44,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 261 transitions. [2022-10-16 02:17:44,574 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 261 transitions. Word has length 151 [2022-10-16 02:17:44,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:17:44,575 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 261 transitions. [2022-10-16 02:17:44,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 8 states have internal predecessors, (36), 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) [2022-10-16 02:17:44,575 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 261 transitions. [2022-10-16 02:17:44,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-10-16 02:17:44,577 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:17:44,578 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:17:44,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-10-16 02:17:44,578 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:17:44,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:17:44,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1358025709, now seen corresponding path program 1 times [2022-10-16 02:17:44,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:17:44,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752625104] [2022-10-16 02:17:44,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:17:44,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:17:44,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:44,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-16 02:17:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:44,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-10-16 02:17:44,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:44,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-10-16 02:17:44,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2022-10-16 02:17:44,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:17:44,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752625104] [2022-10-16 02:17:44,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752625104] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:17:44,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 02:17:44,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-16 02:17:44,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949348656] [2022-10-16 02:17:44,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:17:44,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 02:17:44,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:17:44,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 02:17:44,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 02:17:44,942 INFO L87 Difference]: Start difference. First operand 233 states and 261 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-16 02:17:44,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:17:44,975 INFO L93 Difference]: Finished difference Result 232 states and 260 transitions. [2022-10-16 02:17:44,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 02:17:44,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 152 [2022-10-16 02:17:44,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:17:44,977 INFO L225 Difference]: With dead ends: 232 [2022-10-16 02:17:44,978 INFO L226 Difference]: Without dead ends: 228 [2022-10-16 02:17:44,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 02:17:44,979 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 02:17:44,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 74 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 02:17:44,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-10-16 02:17:44,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2022-10-16 02:17:44,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 218 states have (on average 1.1055045871559632) internal successors, (241), 220 states have internal predecessors, (241), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-10-16 02:17:44,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 255 transitions. [2022-10-16 02:17:44,990 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 255 transitions. Word has length 152 [2022-10-16 02:17:44,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:17:44,990 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 255 transitions. [2022-10-16 02:17:44,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-16 02:17:44,991 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 255 transitions. [2022-10-16 02:17:44,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-10-16 02:17:44,993 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:17:44,993 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:17:44,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-10-16 02:17:44,994 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:17:44,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:17:44,994 INFO L85 PathProgramCache]: Analyzing trace with hash -2071567590, now seen corresponding path program 1 times [2022-10-16 02:17:44,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:17:44,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472830912] [2022-10-16 02:17:44,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:17:44,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:17:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:47,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-16 02:17:47,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:47,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-10-16 02:17:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:47,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-10-16 02:17:47,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:48,549 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 139 proven. 458 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-10-16 02:17:48,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:17:48,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472830912] [2022-10-16 02:17:48,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472830912] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:17:48,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943874565] [2022-10-16 02:17:48,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:17:48,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:17:48,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:17:48,552 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:17:48,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-16 02:17:48,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:17:48,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 50 conjunts are in the unsatisfiable core [2022-10-16 02:17:48,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:17:48,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 02:17:48,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-16 02:17:48,976 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 13 treesize of output 9 [2022-10-16 02:17:50,021 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 280 proven. 207 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-10-16 02:17:50,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:17:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 304 proven. 181 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2022-10-16 02:17:51,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943874565] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:17:51,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:17:51,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 22, 20] total 70 [2022-10-16 02:17:51,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148773331] [2022-10-16 02:17:51,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:17:51,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-10-16 02:17:51,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:17:51,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-10-16 02:17:51,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=4579, Unknown=0, NotChecked=0, Total=4830 [2022-10-16 02:17:51,557 INFO L87 Difference]: Start difference. First operand 228 states and 255 transitions. Second operand has 70 states, 68 states have (on average 3.4411764705882355) internal successors, (234), 69 states have internal predecessors, (234), 5 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-10-16 02:17:57,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:17:57,965 INFO L93 Difference]: Finished difference Result 534 states and 603 transitions. [2022-10-16 02:17:57,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-10-16 02:17:57,966 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 68 states have (on average 3.4411764705882355) internal successors, (234), 69 states have internal predecessors, (234), 5 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 153 [2022-10-16 02:17:57,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:17:57,970 INFO L225 Difference]: With dead ends: 534 [2022-10-16 02:17:57,970 INFO L226 Difference]: Without dead ends: 525 [2022-10-16 02:17:57,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 310 SyntacticMatches, 4 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4538 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1104, Invalid=15666, Unknown=0, NotChecked=0, Total=16770 [2022-10-16 02:17:57,980 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 403 mSDsluCounter, 1575 mSDsCounter, 0 mSdLazyCounter, 3505 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 4972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 3505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1380 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:17:57,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 1626 Invalid, 4972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 3505 Invalid, 0 Unknown, 1380 Unchecked, 2.1s Time] [2022-10-16 02:17:57,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-10-16 02:17:58,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 389. [2022-10-16 02:17:58,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 373 states have (on average 1.1152815013404827) internal successors, (416), 377 states have internal predecessors, (416), 7 states have call successors, (7), 4 states have call predecessors, (7), 8 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-10-16 02:17:58,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 445 transitions. [2022-10-16 02:17:58,016 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 445 transitions. Word has length 153 [2022-10-16 02:17:58,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:17:58,016 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 445 transitions. [2022-10-16 02:17:58,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 68 states have (on average 3.4411764705882355) internal successors, (234), 69 states have internal predecessors, (234), 5 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-10-16 02:17:58,017 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 445 transitions. [2022-10-16 02:17:58,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-10-16 02:17:58,020 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:17:58,021 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:17:58,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-10-16 02:17:58,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-10-16 02:17:58,237 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:17:58,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:17:58,238 INFO L85 PathProgramCache]: Analyzing trace with hash -347809228, now seen corresponding path program 2 times [2022-10-16 02:17:58,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:17:58,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249440542] [2022-10-16 02:17:58,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:17:58,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:17:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:18:01,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-16 02:18:01,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:18:01,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-10-16 02:18:01,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:18:02,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-10-16 02:18:02,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:18:03,048 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 278 proven. 328 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-10-16 02:18:03,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:18:03,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249440542] [2022-10-16 02:18:03,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249440542] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:18:03,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464135927] [2022-10-16 02:18:03,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 02:18:03,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:18:03,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:18:03,052 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:18:03,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-16 02:18:03,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 02:18:03,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 02:18:03,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 90 conjunts are in the unsatisfiable core [2022-10-16 02:18:03,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:18:03,539 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 6 treesize of output 5 [2022-10-16 02:18:04,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-10-16 02:18:04,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-10-16 02:18:04,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 02:18:04,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-10-16 02:18:04,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 02:18:04,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-10-16 02:18:05,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 02:18:05,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-10-16 02:18:05,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2022-10-16 02:18:05,372 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 02:18:05,373 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 38 treesize of output 25 [2022-10-16 02:18:35,638 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 2 proven. 465 refuted. 140 times theorem prover too weak. 57 trivial. 0 not checked. [2022-10-16 02:18:35,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:18:35,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464135927] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:18:35,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 02:18:35,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 77 [2022-10-16 02:18:35,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341059025] [2022-10-16 02:18:35,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 02:18:35,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-10-16 02:18:35,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:18:35,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-10-16 02:18:35,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=5729, Unknown=14, NotChecked=0, Total=6006 [2022-10-16 02:18:35,953 INFO L87 Difference]: Start difference. First operand 389 states and 445 transitions. Second operand has 77 states, 76 states have (on average 3.289473684210526) internal successors, (250), 76 states have internal predecessors, (250), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-16 02:20:49,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:20:49,012 INFO L93 Difference]: Finished difference Result 650 states and 753 transitions. [2022-10-16 02:20:49,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-10-16 02:20:49,017 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 3.289473684210526) internal successors, (250), 76 states have internal predecessors, (250), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 153 [2022-10-16 02:20:49,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:20:49,024 INFO L225 Difference]: With dead ends: 650 [2022-10-16 02:20:49,025 INFO L226 Difference]: Without dead ends: 636 [2022-10-16 02:20:49,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 152 SyntacticMatches, 4 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4061 ImplicationChecksByTransitivity, 162.8s TimeCoverageRelationStatistics Valid=797, Invalid=15913, Unknown=60, NotChecked=0, Total=16770 [2022-10-16 02:20:49,032 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 283 mSDsluCounter, 2267 mSDsCounter, 0 mSdLazyCounter, 3789 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 2338 SdHoareTripleChecker+Invalid, 6552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2723 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-10-16 02:20:49,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 2338 Invalid, 6552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3789 Invalid, 0 Unknown, 2723 Unchecked, 2.2s Time] [2022-10-16 02:20:49,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-10-16 02:20:49,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 539. [2022-10-16 02:20:49,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 517 states have (on average 1.125725338491296) internal successors, (582), 523 states have internal predecessors, (582), 9 states have call successors, (9), 6 states have call predecessors, (9), 12 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2022-10-16 02:20:49,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 628 transitions. [2022-10-16 02:20:49,072 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 628 transitions. Word has length 153 [2022-10-16 02:20:49,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:20:49,072 INFO L495 AbstractCegarLoop]: Abstraction has 539 states and 628 transitions. [2022-10-16 02:20:49,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 3.289473684210526) internal successors, (250), 76 states have internal predecessors, (250), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-16 02:20:49,073 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 628 transitions. [2022-10-16 02:20:49,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-10-16 02:20:49,078 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:20:49,079 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:20:49,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-10-16 02:20:49,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:20:49,293 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:20:49,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:20:49,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1213645658, now seen corresponding path program 3 times [2022-10-16 02:20:49,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:20:49,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818632110] [2022-10-16 02:20:49,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:20:49,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:20:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:20:52,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-16 02:20:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:20:52,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-10-16 02:20:52,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:20:52,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-10-16 02:20:52,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:20:53,355 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 139 proven. 465 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-10-16 02:20:53,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:20:53,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818632110] [2022-10-16 02:20:53,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818632110] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:20:53,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744946678] [2022-10-16 02:20:53,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 02:20:53,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:20:53,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:20:53,357 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:20:53,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-10-16 02:20:53,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-10-16 02:20:53,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 02:20:53,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 74 conjunts are in the unsatisfiable core [2022-10-16 02:20:53,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:20:56,624 INFO L356 Elim1Store]: treesize reduction 34, result has 26.1 percent of original size [2022-10-16 02:20:56,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-10-16 02:20:56,685 INFO L356 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-10-16 02:20:56,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 37 [2022-10-16 02:20:57,156 INFO L356 Elim1Store]: treesize reduction 38, result has 36.7 percent of original size [2022-10-16 02:20:57,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 63 [2022-10-16 02:20:57,600 INFO L356 Elim1Store]: treesize reduction 35, result has 51.4 percent of original size [2022-10-16 02:20:57,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 66 [2022-10-16 02:20:58,167 INFO L356 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2022-10-16 02:20:58,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-10-16 02:21:24,513 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 304 proven. 255 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-10-16 02:21:24,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:21:27,911 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_576 Int) (|v_ULTIMATE.start_main_~i~2#1_46| Int) (v_ArrVal_579 Int) (|ULTIMATE.start_main_~i~2#1| Int)) (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base|) (+ (* |ULTIMATE.start_main_~i~2#1| 4) |c_ULTIMATE.start_main_~#x~0#1.offset|) v_ArrVal_576)) (.cse1 (* |v_ULTIMATE.start_main_~i~2#1_46| 4))) (or (not (<= (+ |ULTIMATE.start_main_~i~2#1| 1) |v_ULTIMATE.start_main_~i~2#1_46|)) (< |v_ULTIMATE.start_main_~i~2#1_46| 2) (not (< |v_ULTIMATE.start_main_~i~2#1_46| 3)) (< (select .cse0 (+ .cse1 |c_ULTIMATE.start_main_~#x~0#1.offset| 4)) v_ArrVal_579) (< (select (store .cse0 (+ .cse1 |c_ULTIMATE.start_main_~#x~0#1.offset|) v_ArrVal_579) (+ |c_ULTIMATE.start_main_~#x~0#1.offset| 8)) 1)))) is different from false