/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-16 05:15:34,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-16 05:15:34,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-16 05:15:34,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-16 05:15:34,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-16 05:15:34,727 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-16 05:15:34,731 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-16 05:15:34,739 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-16 05:15:34,741 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-16 05:15:34,747 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-16 05:15:34,748 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-16 05:15:34,753 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-16 05:15:34,753 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-16 05:15:34,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-16 05:15:34,758 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-16 05:15:34,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-16 05:15:34,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-16 05:15:34,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-16 05:15:34,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-16 05:15:34,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-16 05:15:34,779 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-16 05:15:34,780 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-16 05:15:34,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-16 05:15:34,782 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-16 05:15:34,793 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-16 05:15:34,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-16 05:15:34,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-16 05:15:34,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-16 05:15:34,808 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 05:15:34,859 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-16 05:15:34,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-16 05:15:34,860 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-16 05:15:34,860 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-16 05:15:34,862 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-16 05:15:34,862 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-16 05:15:34,865 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-16 05:15:34,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-16 05:15:34,866 INFO L138 SettingsManager]: * Use SBE=true [2022-10-16 05:15:34,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-16 05:15:34,867 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-16 05:15:34,868 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-16 05:15:34,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-16 05:15:34,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-16 05:15:34,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-16 05:15:34,869 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-16 05:15:34,869 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-16 05:15:34,869 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-16 05:15:34,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-16 05:15:34,869 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-16 05:15:34,870 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-16 05:15:34,870 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-16 05:15:34,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-16 05:15:34,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-16 05:15:34,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-16 05:15:34,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 05:15:34,871 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-16 05:15:34,871 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-16 05:15:34,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-16 05:15:34,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-16 05:15:34,872 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-16 05:15:35,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-16 05:15:35,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-16 05:15:35,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-16 05:15:35,264 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-16 05:15:35,264 INFO L275 PluginConnector]: CDTParser initialized [2022-10-16 05:15:35,266 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i [2022-10-16 05:15:35,349 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64fcac869/06a30f5df1964e1fa066838c778d54c4/FLAGc319cac40 [2022-10-16 05:15:36,017 INFO L306 CDTParser]: Found 1 translation units. [2022-10-16 05:15:36,017 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i [2022-10-16 05:15:36,025 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64fcac869/06a30f5df1964e1fa066838c778d54c4/FLAGc319cac40 [2022-10-16 05:15:36,392 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64fcac869/06a30f5df1964e1fa066838c778d54c4 [2022-10-16 05:15:36,396 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-16 05:15:36,403 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-16 05:15:36,406 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-16 05:15:36,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-16 05:15:36,411 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-16 05:15:36,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:15:36" (1/1) ... [2022-10-16 05:15:36,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4df7611f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:15:36, skipping insertion in model container [2022-10-16 05:15:36,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:15:36" (1/1) ... [2022-10-16 05:15:36,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-16 05:15:36,446 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-16 05:15:36,633 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i[823,836] [2022-10-16 05:15:36,689 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 05:15:36,703 INFO L203 MainTranslator]: Completed pre-run [2022-10-16 05:15:36,725 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i[823,836] [2022-10-16 05:15:36,765 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 05:15:36,787 INFO L208 MainTranslator]: Completed translation [2022-10-16 05:15:36,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:15:36 WrapperNode [2022-10-16 05:15:36,791 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-16 05:15:36,793 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-16 05:15:36,793 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-16 05:15:36,794 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-16 05:15:36,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:15:36" (1/1) ... [2022-10-16 05:15:36,825 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:15:36" (1/1) ... [2022-10-16 05:15:36,871 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 114 [2022-10-16 05:15:36,872 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-16 05:15:36,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-16 05:15:36,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-16 05:15:36,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-16 05:15:36,886 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:15:36" (1/1) ... [2022-10-16 05:15:36,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:15:36" (1/1) ... [2022-10-16 05:15:36,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:15:36" (1/1) ... [2022-10-16 05:15:36,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:15:36" (1/1) ... [2022-10-16 05:15:36,923 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:15:36" (1/1) ... [2022-10-16 05:15:36,931 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:15:36" (1/1) ... [2022-10-16 05:15:36,934 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:15:36" (1/1) ... [2022-10-16 05:15:36,940 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:15:36" (1/1) ... [2022-10-16 05:15:36,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-16 05:15:36,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-16 05:15:36,947 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-16 05:15:36,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-16 05:15:36,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:15:36" (1/1) ... [2022-10-16 05:15:36,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 05:15:36,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:15:36,989 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 05:15:37,019 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 05:15:37,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-16 05:15:37,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-16 05:15:37,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-16 05:15:37,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-16 05:15:37,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-16 05:15:37,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-16 05:15:37,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-16 05:15:37,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-16 05:15:37,073 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-16 05:15:37,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-16 05:15:37,193 INFO L235 CfgBuilder]: Building ICFG [2022-10-16 05:15:37,196 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-16 05:15:37,646 INFO L276 CfgBuilder]: Performing block encoding [2022-10-16 05:15:37,654 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-16 05:15:37,654 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-10-16 05:15:37,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:15:37 BoogieIcfgContainer [2022-10-16 05:15:37,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-16 05:15:37,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-16 05:15:37,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-16 05:15:37,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-16 05:15:37,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 05:15:36" (1/3) ... [2022-10-16 05:15:37,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f29bf2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:15:37, skipping insertion in model container [2022-10-16 05:15:37,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:15:36" (2/3) ... [2022-10-16 05:15:37,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f29bf2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:15:37, skipping insertion in model container [2022-10-16 05:15:37,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:15:37" (3/3) ... [2022-10-16 05:15:37,668 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-1.i [2022-10-16 05:15:37,711 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-16 05:15:37,712 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-10-16 05:15:37,788 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-16 05:15:37,796 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;@4313021, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-16 05:15:37,797 INFO L358 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2022-10-16 05:15:37,802 INFO L276 IsEmpty]: Start isEmpty. Operand has 83 states, 50 states have (on average 1.94) internal successors, (97), 78 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 05:15:37,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 05:15:37,809 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:15:37,810 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 05:15:37,810 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-16 05:15:37,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:15:37,816 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-10-16 05:15:37,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:15:37,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541782560] [2022-10-16 05:15:37,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:37,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:15:37,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:15:38,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:15:38,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541782560] [2022-10-16 05:15:38,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541782560] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:15:38,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:15:38,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:15:38,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860810971] [2022-10-16 05:15:38,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:15:38,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:15:38,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:15:38,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:15:38,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:15:38,106 INFO L87 Difference]: Start difference. First operand has 83 states, 50 states have (on average 1.94) internal successors, (97), 78 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) 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 05:15:38,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:15:38,207 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2022-10-16 05:15:38,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:15:38,210 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 05:15:38,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:15:38,220 INFO L225 Difference]: With dead ends: 70 [2022-10-16 05:15:38,220 INFO L226 Difference]: Without dead ends: 68 [2022-10-16 05:15:38,222 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 05:15:38,227 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 63 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:15:38,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 60 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:15:38,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-10-16 05:15:38,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-10-16 05:15:38,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 49 states have (on average 1.489795918367347) internal successors, (73), 63 states have internal predecessors, (73), 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 05:15:38,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2022-10-16 05:15:38,278 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 4 [2022-10-16 05:15:38,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:15:38,278 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2022-10-16 05:15:38,278 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 05:15:38,279 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2022-10-16 05:15:38,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 05:15:38,279 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:15:38,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 05:15:38,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-16 05:15:38,280 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-16 05:15:38,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:15:38,281 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-10-16 05:15:38,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:15:38,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569785984] [2022-10-16 05:15:38,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:38,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:15:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:38,456 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 05:15:38,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:15:38,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569785984] [2022-10-16 05:15:38,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569785984] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:15:38,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:15:38,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:15:38,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057805038] [2022-10-16 05:15:38,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:15:38,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:15:38,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:15:38,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:15:38,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:15:38,461 INFO L87 Difference]: Start difference. First operand 68 states and 79 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 05:15:38,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:15:38,526 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2022-10-16 05:15:38,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:15:38,526 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 05:15:38,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:15:38,528 INFO L225 Difference]: With dead ends: 72 [2022-10-16 05:15:38,528 INFO L226 Difference]: Without dead ends: 72 [2022-10-16 05:15:38,529 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 05:15:38,531 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 2 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:15:38,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 123 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:15:38,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-10-16 05:15:38,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2022-10-16 05:15:38,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 65 states have internal predecessors, (75), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 05:15:38,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2022-10-16 05:15:38,544 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 4 [2022-10-16 05:15:38,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:15:38,544 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2022-10-16 05:15:38,545 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 05:15:38,545 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2022-10-16 05:15:38,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-16 05:15:38,546 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:15:38,546 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-10-16 05:15:38,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-16 05:15:38,546 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-16 05:15:38,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:15:38,547 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2022-10-16 05:15:38,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:15:38,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108800322] [2022-10-16 05:15:38,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:38,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:15:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:38,702 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 05:15:38,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:15:38,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108800322] [2022-10-16 05:15:38,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108800322] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:15:38,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394579637] [2022-10-16 05:15:38,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:38,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:15:38,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:15:38,707 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 05:15:38,735 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 05:15:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:38,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-16 05:15:38,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:15:38,877 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 05:15:38,936 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 05:15:38,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:15:39,011 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 05:15:39,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394579637] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:15:39,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:15:39,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-10-16 05:15:39,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922666335] [2022-10-16 05:15:39,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:15:39,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 05:15:39,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:15:39,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 05:15:39,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-16 05:15:39,015 INFO L87 Difference]: Start difference. First operand 70 states and 81 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 05:15:39,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:15:39,289 INFO L93 Difference]: Finished difference Result 188 states and 225 transitions. [2022-10-16 05:15:39,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 05:15:39,290 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 05:15:39,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:15:39,292 INFO L225 Difference]: With dead ends: 188 [2022-10-16 05:15:39,293 INFO L226 Difference]: Without dead ends: 188 [2022-10-16 05:15:39,293 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 05:15:39,295 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 185 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 05:15:39,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 253 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 05:15:39,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-10-16 05:15:39,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 82. [2022-10-16 05:15:39,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 63 states have (on average 1.4126984126984128) internal successors, (89), 77 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 05:15:39,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2022-10-16 05:15:39,311 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 8 [2022-10-16 05:15:39,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:15:39,312 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2022-10-16 05:15:39,313 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 05:15:39,313 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2022-10-16 05:15:39,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-16 05:15:39,314 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:15:39,314 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:15:39,351 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 05:15:39,528 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 05:15:39,528 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-16 05:15:39,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:15:39,529 INFO L85 PathProgramCache]: Analyzing trace with hash -169937429, now seen corresponding path program 1 times [2022-10-16 05:15:39,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:15:39,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153859127] [2022-10-16 05:15:39,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:39,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:15:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:39,607 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 05:15:39,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:15:39,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153859127] [2022-10-16 05:15:39,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153859127] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:15:39,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937395322] [2022-10-16 05:15:39,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:39,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:15:39,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:15:39,610 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 05:15:39,614 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 05:15:39,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:39,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-16 05:15:39,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:15:39,709 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 05:15:39,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:15:39,761 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 05:15:39,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937395322] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:15:39,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:15:39,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-10-16 05:15:39,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607964309] [2022-10-16 05:15:39,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:15:39,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-16 05:15:39,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:15:39,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-16 05:15:39,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-16 05:15:39,772 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 05:15:39,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:15:39,815 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2022-10-16 05:15:39,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 05:15:39,816 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-10-16 05:15:39,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:15:39,819 INFO L225 Difference]: With dead ends: 90 [2022-10-16 05:15:39,820 INFO L226 Difference]: Without dead ends: 90 [2022-10-16 05:15:39,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-16 05:15:39,824 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 30 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:15:39,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 225 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:15:39,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-10-16 05:15:39,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2022-10-16 05:15:39,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 70 states have (on average 1.3571428571428572) internal successors, (95), 84 states have internal predecessors, (95), 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 05:15:39,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2022-10-16 05:15:39,849 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 15 [2022-10-16 05:15:39,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:15:39,851 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2022-10-16 05:15:39,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 05:15:39,852 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2022-10-16 05:15:39,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-16 05:15:39,852 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:15:39,855 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2022-10-16 05:15:39,890 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 05:15:40,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-10-16 05:15:40,068 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-16 05:15:40,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:15:40,070 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2022-10-16 05:15:40,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:15:40,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145726849] [2022-10-16 05:15:40,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:40,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:15:40,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:15:40,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:15:40,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145726849] [2022-10-16 05:15:40,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145726849] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:15:40,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822104673] [2022-10-16 05:15:40,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:15:40,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:15:40,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:15:40,398 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 05:15:40,424 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 05:15:40,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:15:40,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:15:40,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-16 05:15:40,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:15:40,484 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 05:15:40,720 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 05:15:40,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:15:40,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822104673] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:15:40,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:15:40,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2022-10-16 05:15:40,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57590607] [2022-10-16 05:15:40,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:15:40,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 05:15:40,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:15:40,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 05:15:40,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-10-16 05:15:40,724 INFO L87 Difference]: Start difference. First operand 89 states and 101 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 05:15:40,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:15:40,832 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2022-10-16 05:15:40,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 05:15:40,837 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 05:15:40,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:15:40,838 INFO L225 Difference]: With dead ends: 88 [2022-10-16 05:15:40,838 INFO L226 Difference]: Without dead ends: 88 [2022-10-16 05:15:40,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-10-16 05:15:40,844 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 64 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:15:40,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 107 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:15:40,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-10-16 05:15:40,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-10-16 05:15:40,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 83 states have internal predecessors, (93), 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 05:15:40,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2022-10-16 05:15:40,859 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 20 [2022-10-16 05:15:40,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:15:40,860 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2022-10-16 05:15:40,860 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 05:15:40,860 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2022-10-16 05:15:40,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-10-16 05:15:40,862 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:15:40,862 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:15:40,900 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 05:15:41,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:15:41,076 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-16 05:15:41,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:15:41,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1600163167, now seen corresponding path program 2 times [2022-10-16 05:15:41,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:15:41,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229516020] [2022-10-16 05:15:41,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:41,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:15:41,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:41,215 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:15:41,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:15:41,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229516020] [2022-10-16 05:15:41,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229516020] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:15:41,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099149677] [2022-10-16 05:15:41,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:15:41,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:15:41,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:15:41,218 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 05:15:41,241 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 05:15:41,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-16 05:15:41,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:15:41,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-16 05:15:41,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:15:41,285 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 05:15:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-10-16 05:15:41,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:15:41,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099149677] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:15:41,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:15:41,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2022-10-16 05:15:41,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375233820] [2022-10-16 05:15:41,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:15:41,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 05:15:41,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:15:41,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 05:15:41,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-10-16 05:15:41,436 INFO L87 Difference]: Start difference. First operand 88 states and 99 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states 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 05:15:41,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:15:41,587 INFO L93 Difference]: Finished difference Result 131 states and 151 transitions. [2022-10-16 05:15:41,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 05:15:41,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-10-16 05:15:41,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:15:41,589 INFO L225 Difference]: With dead ends: 131 [2022-10-16 05:15:41,589 INFO L226 Difference]: Without dead ends: 131 [2022-10-16 05:15:41,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-10-16 05:15:41,591 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 114 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:15:41,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 111 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:15:41,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-10-16 05:15:41,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 119. [2022-10-16 05:15:41,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 99 states have (on average 1.3636363636363635) internal successors, (135), 112 states have internal predecessors, (135), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-16 05:15:41,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 145 transitions. [2022-10-16 05:15:41,599 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 145 transitions. Word has length 31 [2022-10-16 05:15:41,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:15:41,600 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 145 transitions. [2022-10-16 05:15:41,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states 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 05:15:41,600 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 145 transitions. [2022-10-16 05:15:41,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-10-16 05:15:41,601 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:15:41,601 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:15:41,628 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 05:15:41,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:15:41,814 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-16 05:15:41,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:15:41,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1934549393, now seen corresponding path program 1 times [2022-10-16 05:15:41,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:15:41,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693446884] [2022-10-16 05:15:41,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:41,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:15:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-10-16 05:15:42,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:15:42,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693446884] [2022-10-16 05:15:42,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693446884] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:15:42,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425886111] [2022-10-16 05:15:42,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:42,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:15:42,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:15:42,045 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 05:15:42,065 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 05:15:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:42,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-16 05:15:42,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:15:42,211 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:15:42,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:15:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:15:42,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425886111] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:15:42,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:15:42,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2022-10-16 05:15:42,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897555736] [2022-10-16 05:15:42,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:15:42,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-10-16 05:15:42,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:15:42,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-10-16 05:15:42,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2022-10-16 05:15:42,345 INFO L87 Difference]: Start difference. First operand 119 states and 145 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:15:42,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:15:42,870 INFO L93 Difference]: Finished difference Result 199 states and 229 transitions. [2022-10-16 05:15:42,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-10-16 05:15:42,870 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-10-16 05:15:42,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:15:42,872 INFO L225 Difference]: With dead ends: 199 [2022-10-16 05:15:42,872 INFO L226 Difference]: Without dead ends: 199 [2022-10-16 05:15:42,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=421, Invalid=839, Unknown=0, NotChecked=0, Total=1260 [2022-10-16 05:15:42,874 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 355 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 05:15:42,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 312 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 05:15:42,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-10-16 05:15:42,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 157. [2022-10-16 05:15:42,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 137 states have (on average 1.2846715328467153) internal successors, (176), 150 states have internal predecessors, (176), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-16 05:15:42,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 186 transitions. [2022-10-16 05:15:42,882 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 186 transitions. Word has length 32 [2022-10-16 05:15:42,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:15:42,883 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 186 transitions. [2022-10-16 05:15:42,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:15:42,883 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 186 transitions. [2022-10-16 05:15:42,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-10-16 05:15:42,885 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:15:42,885 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:15:42,921 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 05:15:43,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:15:43,102 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-16 05:15:43,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:15:43,103 INFO L85 PathProgramCache]: Analyzing trace with hash -2033957782, now seen corresponding path program 1 times [2022-10-16 05:15:43,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:15:43,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048935226] [2022-10-16 05:15:43,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:43,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:15:43,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:43,521 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:15:43,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:15:43,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048935226] [2022-10-16 05:15:43,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048935226] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:15:43,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618004760] [2022-10-16 05:15:43,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:43,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:15:43,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:15:43,524 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 05:15:43,546 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 05:15:43,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:43,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-16 05:15:43,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:15:43,725 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:15:43,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:15:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:15:44,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618004760] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:15:44,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:15:44,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-10-16 05:15:44,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211020182] [2022-10-16 05:15:44,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:15:44,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-10-16 05:15:44,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:15:44,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-10-16 05:15:44,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-16 05:15:44,124 INFO L87 Difference]: Start difference. First operand 157 states and 186 transitions. Second operand has 33 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 33 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:15:44,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:15:44,253 INFO L93 Difference]: Finished difference Result 221 states and 250 transitions. [2022-10-16 05:15:44,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-10-16 05:15:44,254 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 33 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-10-16 05:15:44,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:15:44,255 INFO L225 Difference]: With dead ends: 221 [2022-10-16 05:15:44,255 INFO L226 Difference]: Without dead ends: 221 [2022-10-16 05:15:44,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-16 05:15:44,257 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 135 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:15:44,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 249 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:15:44,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-10-16 05:15:44,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2022-10-16 05:15:44,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 201 states have (on average 1.1940298507462686) internal successors, (240), 214 states have internal predecessors, (240), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-16 05:15:44,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 250 transitions. [2022-10-16 05:15:44,265 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 250 transitions. Word has length 68 [2022-10-16 05:15:44,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:15:44,266 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 250 transitions. [2022-10-16 05:15:44,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 33 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:15:44,266 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 250 transitions. [2022-10-16 05:15:44,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-10-16 05:15:44,270 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:15:44,271 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:15:44,311 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 05:15:44,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:15:44,486 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-16 05:15:44,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:15:44,487 INFO L85 PathProgramCache]: Analyzing trace with hash 263149722, now seen corresponding path program 2 times [2022-10-16 05:15:44,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:15:44,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092396578] [2022-10-16 05:15:44,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:44,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:15:44,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:15:45,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:15:45,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092396578] [2022-10-16 05:15:45,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092396578] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:15:45,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81151265] [2022-10-16 05:15:45,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:15:45,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:15:45,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:15:45,967 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 05:15:45,971 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 05:15:46,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:15:46,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:15:46,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-16 05:15:46,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:15:46,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:15:46,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:15:47,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:15:47,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81151265] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:15:47,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:15:47,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-10-16 05:15:47,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651324161] [2022-10-16 05:15:47,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:15:47,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-10-16 05:15:47,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:15:47,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-10-16 05:15:47,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-16 05:15:47,770 INFO L87 Difference]: Start difference. First operand 221 states and 250 transitions. Second operand has 65 states, 65 states have (on average 3.9692307692307693) internal successors, (258), 65 states have internal predecessors, (258), 0 states have call successors, (0), 0 states 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 05:15:48,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:15:48,054 INFO L93 Difference]: Finished difference Result 349 states and 378 transitions. [2022-10-16 05:15:48,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-10-16 05:15:48,055 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.9692307692307693) internal successors, (258), 65 states have internal predecessors, (258), 0 states have call successors, (0), 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 132 [2022-10-16 05:15:48,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:15:48,058 INFO L225 Difference]: With dead ends: 349 [2022-10-16 05:15:48,058 INFO L226 Difference]: Without dead ends: 349 [2022-10-16 05:15:48,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-16 05:15:48,061 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 279 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 05:15:48,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 497 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 05:15:48,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-10-16 05:15:48,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2022-10-16 05:15:48,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 329 states have (on average 1.1185410334346504) internal successors, (368), 342 states have internal predecessors, (368), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-16 05:15:48,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 378 transitions. [2022-10-16 05:15:48,073 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 378 transitions. Word has length 132 [2022-10-16 05:15:48,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:15:48,074 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 378 transitions. [2022-10-16 05:15:48,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.9692307692307693) internal successors, (258), 65 states have internal predecessors, (258), 0 states have call successors, (0), 0 states 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 05:15:48,075 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 378 transitions. [2022-10-16 05:15:48,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-10-16 05:15:48,082 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:15:48,083 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:15:48,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-10-16 05:15:48,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:15:48,298 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-16 05:15:48,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:15:48,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1051131654, now seen corresponding path program 3 times [2022-10-16 05:15:48,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:15:48,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133404820] [2022-10-16 05:15:48,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:48,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:15:48,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7628 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:15:52,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:15:52,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133404820] [2022-10-16 05:15:52,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133404820] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:15:52,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190513529] [2022-10-16 05:15:52,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 05:15:52,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:15:52,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:15:52,989 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 05:15:53,008 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 05:15:53,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-16 05:15:53,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:15:53,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-16 05:15:53,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:15:53,144 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 05:15:54,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7628 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2022-10-16 05:15:54,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:15:54,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190513529] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:15:54,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:15:54,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [65] total 70 [2022-10-16 05:15:54,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336151270] [2022-10-16 05:15:54,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:15:54,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 05:15:54,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:15:54,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 05:15:54,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2097, Invalid=2733, Unknown=0, NotChecked=0, Total=4830 [2022-10-16 05:15:54,183 INFO L87 Difference]: Start difference. First operand 349 states and 378 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:15:54,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:15:54,400 INFO L93 Difference]: Finished difference Result 359 states and 389 transitions. [2022-10-16 05:15:54,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 05:15:54,400 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 260 [2022-10-16 05:15:54,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:15:54,403 INFO L225 Difference]: With dead ends: 359 [2022-10-16 05:15:54,404 INFO L226 Difference]: Without dead ends: 359 [2022-10-16 05:15:54,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2118, Invalid=3138, Unknown=0, NotChecked=0, Total=5256 [2022-10-16 05:15:54,407 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 225 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:15:54,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 72 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:15:54,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-10-16 05:15:54,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 350. [2022-10-16 05:15:54,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 330 states have (on average 1.1151515151515152) internal successors, (368), 343 states have internal predecessors, (368), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-16 05:15:54,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 378 transitions. [2022-10-16 05:15:54,417 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 378 transitions. Word has length 260 [2022-10-16 05:15:54,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:15:54,418 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 378 transitions. [2022-10-16 05:15:54,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:15:54,418 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 378 transitions. [2022-10-16 05:15:54,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-10-16 05:15:54,423 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:15:54,423 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:15:54,458 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 05:15:54,639 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,SelfDestructingSolverStorable9 [2022-10-16 05:15:54,640 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-16 05:15:54,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:15:54,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1772808686, now seen corresponding path program 1 times [2022-10-16 05:15:54,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:15:54,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044052605] [2022-10-16 05:15:54,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:54,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:15:54,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:58,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7627 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 05:15:58,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:15:58,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044052605] [2022-10-16 05:15:58,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044052605] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:15:58,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463481558] [2022-10-16 05:15:58,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:58,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:15:58,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:15:58,875 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 05:15:58,884 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 05:15:59,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:59,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 935 conjuncts, 64 conjunts are in the unsatisfiable core [2022-10-16 05:15:59,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:15:59,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7627 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 05:15:59,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:16:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7627 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 05:16:04,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463481558] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:16:04,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:16:04,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 129 [2022-10-16 05:16:04,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006933665] [2022-10-16 05:16:04,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:16:04,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-10-16 05:16:04,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:16:04,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-10-16 05:16:04,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2022-10-16 05:16:04,550 INFO L87 Difference]: Start difference. First operand 350 states and 378 transitions. Second operand has 129 states, 129 states have (on average 4.0) internal successors, (516), 129 states have internal predecessors, (516), 0 states have call successors, (0), 0 states 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 05:16:05,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:16:05,244 INFO L93 Difference]: Finished difference Result 606 states and 634 transitions. [2022-10-16 05:16:05,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-10-16 05:16:05,245 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 4.0) internal successors, (516), 129 states have internal predecessors, (516), 0 states have call successors, (0), 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 261 [2022-10-16 05:16:05,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:16:05,248 INFO L225 Difference]: With dead ends: 606 [2022-10-16 05:16:05,248 INFO L226 Difference]: Without dead ends: 606 [2022-10-16 05:16:05,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2022-10-16 05:16:05,255 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 378 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-16 05:16:05,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 921 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-16 05:16:05,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-10-16 05:16:05,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 606. [2022-10-16 05:16:05,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 586 states have (on average 1.0648464163822526) internal successors, (624), 599 states have internal predecessors, (624), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-16 05:16:05,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 634 transitions. [2022-10-16 05:16:05,268 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 634 transitions. Word has length 261 [2022-10-16 05:16:05,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:16:05,269 INFO L495 AbstractCegarLoop]: Abstraction has 606 states and 634 transitions. [2022-10-16 05:16:05,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 4.0) internal successors, (516), 129 states have internal predecessors, (516), 0 states have call successors, (0), 0 states 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 05:16:05,270 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 634 transitions. [2022-10-16 05:16:05,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2022-10-16 05:16:05,280 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:16:05,280 INFO L195 NwaCegarLoop]: trace histogram [126, 126, 126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:16:05,318 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 05:16:05,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:16:05,494 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-16 05:16:05,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:16:05,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1959546578, now seen corresponding path program 2 times [2022-10-16 05:16:05,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:16:05,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705007095] [2022-10-16 05:16:05,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:16:05,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:16:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:16:20,073 INFO L134 CoverageAnalysis]: Checked inductivity of 31627 backedges. 0 proven. 31626 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 05:16:20,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:16:20,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705007095] [2022-10-16 05:16:20,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705007095] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:16:20,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448945407] [2022-10-16 05:16:20,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:16:20,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:16:20,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:16:20,080 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 05:16:20,081 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 05:16:20,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:16:20,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:16:20,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 1831 conjuncts, 128 conjunts are in the unsatisfiable core [2022-10-16 05:16:20,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:16:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 31627 backedges. 0 proven. 31626 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 05:16:21,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:16:42,083 INFO L134 CoverageAnalysis]: Checked inductivity of 31627 backedges. 0 proven. 31626 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 05:16:42,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448945407] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:16:42,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:16:42,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129, 129] total 257 [2022-10-16 05:16:42,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654198659] [2022-10-16 05:16:42,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:16:42,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 257 states [2022-10-16 05:16:42,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:16:42,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 257 interpolants. [2022-10-16 05:16:42,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32896, Invalid=32896, Unknown=0, NotChecked=0, Total=65792 [2022-10-16 05:16:42,107 INFO L87 Difference]: Start difference. First operand 606 states and 634 transitions. Second operand has 257 states, 257 states have (on average 4.0) internal successors, (1028), 257 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states 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 05:16:44,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:16:44,685 INFO L93 Difference]: Finished difference Result 1118 states and 1146 transitions. [2022-10-16 05:16:44,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2022-10-16 05:16:44,687 INFO L78 Accepts]: Start accepts. Automaton has has 257 states, 257 states have (on average 4.0) internal successors, (1028), 257 states have internal predecessors, (1028), 0 states have call successors, (0), 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 517 [2022-10-16 05:16:44,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:16:44,692 INFO L225 Difference]: With dead ends: 1118 [2022-10-16 05:16:44,692 INFO L226 Difference]: Without dead ends: 1118 [2022-10-16 05:16:44,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1161 GetRequests, 906 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=32896, Invalid=32896, Unknown=0, NotChecked=0, Total=65792 [2022-10-16 05:16:44,700 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 1143 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1143 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-16 05:16:44,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1143 Valid, 617 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-16 05:16:44,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-10-16 05:16:44,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1118. [2022-10-16 05:16:44,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1098 states have (on average 1.034608378870674) internal successors, (1136), 1111 states have internal predecessors, (1136), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-16 05:16:44,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1146 transitions. [2022-10-16 05:16:44,723 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1146 transitions. Word has length 517 [2022-10-16 05:16:44,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:16:44,724 INFO L495 AbstractCegarLoop]: Abstraction has 1118 states and 1146 transitions. [2022-10-16 05:16:44,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 257 states, 257 states have (on average 4.0) internal successors, (1028), 257 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states 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 05:16:44,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1146 transitions. [2022-10-16 05:16:44,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1030 [2022-10-16 05:16:44,765 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:16:44,765 INFO L195 NwaCegarLoop]: trace histogram [254, 254, 254, 254, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:16:44,799 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 05:16:44,981 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,SelfDestructingSolverStorable11 [2022-10-16 05:16:44,982 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-16 05:16:44,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:16:44,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1207091282, now seen corresponding path program 3 times [2022-10-16 05:16:44,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:16:44,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206243249] [2022-10-16 05:16:44,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:16:44,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:16:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:17:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 128779 backedges. 0 proven. 128778 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 05:17:47,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:17:47,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206243249] [2022-10-16 05:17:47,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206243249] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:17:47,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143937998] [2022-10-16 05:17:47,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 05:17:47,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:17:47,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:17:47,698 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 05:17:47,714 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 05:17:47,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-16 05:17:47,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:17:47,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-16 05:17:47,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:17:48,363 INFO L134 CoverageAnalysis]: Checked inductivity of 128779 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 128778 trivial. 0 not checked. [2022-10-16 05:17:48,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:17:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 128779 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 128778 trivial. 0 not checked. [2022-10-16 05:17:48,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143937998] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:17:48,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:17:48,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [257, 5, 5] total 263 [2022-10-16 05:17:48,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456334670] [2022-10-16 05:17:48,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:17:48,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 263 states [2022-10-16 05:17:48,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:17:48,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 263 interpolants. [2022-10-16 05:17:48,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32915, Invalid=35991, Unknown=0, NotChecked=0, Total=68906 [2022-10-16 05:17:48,776 INFO L87 Difference]: Start difference. First operand 1118 states and 1146 transitions. Second operand has 263 states, 263 states have (on average 3.9961977186311786) internal successors, (1051), 263 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states 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 05:18:24,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:18:24,023 INFO L93 Difference]: Finished difference Result 1208 states and 1244 transitions. [2022-10-16 05:18:24,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 266 states. [2022-10-16 05:18:24,024 INFO L78 Accepts]: Start accepts. Automaton has has 263 states, 263 states have (on average 3.9961977186311786) internal successors, (1051), 263 states have internal predecessors, (1051), 0 states have call successors, (0), 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 1029 [2022-10-16 05:18:24,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:18:24,032 INFO L225 Difference]: With dead ends: 1208 [2022-10-16 05:18:24,032 INFO L226 Difference]: Without dead ends: 1208 [2022-10-16 05:18:24,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2574 GetRequests, 2052 SyntacticMatches, 0 SemanticMatches, 522 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35713 ImplicationChecksByTransitivity, 59.5s TimeCoverageRelationStatistics Valid=99009, Invalid=175043, Unknown=0, NotChecked=0, Total=274052 [2022-10-16 05:18:24,055 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 2520 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2524 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 1581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:18:24,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2524 Valid, 967 Invalid, 1581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-10-16 05:18:24,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2022-10-16 05:18:24,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1157. [2022-10-16 05:18:24,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1137 states have (on average 1.04221635883905) internal successors, (1185), 1150 states have internal predecessors, (1185), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-16 05:18:24,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 1195 transitions. [2022-10-16 05:18:24,080 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 1195 transitions. Word has length 1029 [2022-10-16 05:18:24,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:18:24,084 INFO L495 AbstractCegarLoop]: Abstraction has 1157 states and 1195 transitions. [2022-10-16 05:18:24,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 263 states, 263 states have (on average 3.9961977186311786) internal successors, (1051), 263 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states 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 05:18:24,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 1195 transitions. [2022-10-16 05:18:24,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1034 [2022-10-16 05:18:24,095 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:18:24,096 INFO L195 NwaCegarLoop]: trace histogram [255, 255, 255, 255, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:18:24,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-10-16 05:18:24,310 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,SelfDestructingSolverStorable12 [2022-10-16 05:18:24,311 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-16 05:18:24,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:18:24,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1444740303, now seen corresponding path program 1 times [2022-10-16 05:18:24,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:18:24,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268606560] [2022-10-16 05:18:24,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:18:24,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:18:25,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat