/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_bubblesort_2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-16 05:13:55,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-16 05:13:55,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-16 05:13:55,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-16 05:13:55,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-16 05:13:55,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-16 05:13:55,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-16 05:13:55,793 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-16 05:13:55,795 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-16 05:13:55,796 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-16 05:13:55,797 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-16 05:13:55,799 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-16 05:13:55,799 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-16 05:13:55,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-16 05:13:55,802 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-16 05:13:55,803 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-16 05:13:55,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-16 05:13:55,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-16 05:13:55,807 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-16 05:13:55,809 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-16 05:13:55,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-16 05:13:55,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-16 05:13:55,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-16 05:13:55,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-16 05:13:55,819 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-16 05:13:55,828 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-16 05:13:55,829 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-16 05:13:55,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-16 05:13:55,831 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 05:13:55,858 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-16 05:13:55,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-16 05:13:55,859 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-16 05:13:55,859 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-16 05:13:55,860 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-16 05:13:55,860 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-16 05:13:55,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-16 05:13:55,862 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-16 05:13:55,862 INFO L138 SettingsManager]: * Use SBE=true [2022-10-16 05:13:55,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-16 05:13:55,862 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-16 05:13:55,863 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-16 05:13:55,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-16 05:13:55,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-16 05:13:55,863 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-16 05:13:55,864 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-16 05:13:55,864 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-16 05:13:55,864 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-16 05:13:55,864 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-16 05:13:55,865 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-16 05:13:55,865 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-16 05:13:55,865 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-16 05:13:55,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-16 05:13:55,866 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-16 05:13:55,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-16 05:13:55,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 05:13:55,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-16 05:13:55,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-16 05:13:55,867 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-16 05:13:55,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-16 05:13:55,868 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-16 05:13:56,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-16 05:13:56,272 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-16 05:13:56,275 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-16 05:13:56,277 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-16 05:13:56,278 INFO L275 PluginConnector]: CDTParser initialized [2022-10-16 05:13:56,279 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i [2022-10-16 05:13:56,358 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7d58d112/27f72b39d0cf4d38bb475c6ca04b8ee9/FLAG463a6f8fa [2022-10-16 05:13:57,035 INFO L306 CDTParser]: Found 1 translation units. [2022-10-16 05:13:57,036 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i [2022-10-16 05:13:57,048 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7d58d112/27f72b39d0cf4d38bb475c6ca04b8ee9/FLAG463a6f8fa [2022-10-16 05:13:57,409 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7d58d112/27f72b39d0cf4d38bb475c6ca04b8ee9 [2022-10-16 05:13:57,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-16 05:13:57,421 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-16 05:13:57,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-16 05:13:57,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-16 05:13:57,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-16 05:13:57,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:13:57" (1/1) ... [2022-10-16 05:13:57,432 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d46b894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:13:57, skipping insertion in model container [2022-10-16 05:13:57,432 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:13:57" (1/1) ... [2022-10-16 05:13:57,441 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-16 05:13:57,464 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-16 05:13:57,724 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_bubblesort_2_ground.i[820,833] [2022-10-16 05:13:57,757 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 05:13:57,774 INFO L203 MainTranslator]: Completed pre-run [2022-10-16 05:13:57,795 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_bubblesort_2_ground.i[820,833] [2022-10-16 05:13:57,824 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 05:13:57,845 INFO L208 MainTranslator]: Completed translation [2022-10-16 05:13:57,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:13:57 WrapperNode [2022-10-16 05:13:57,846 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-16 05:13:57,847 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-16 05:13:57,848 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-16 05:13:57,848 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-16 05:13:57,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:13:57" (1/1) ... [2022-10-16 05:13:57,867 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:13:57" (1/1) ... [2022-10-16 05:13:57,903 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 82 [2022-10-16 05:13:57,904 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-16 05:13:57,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-16 05:13:57,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-16 05:13:57,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-16 05:13:57,919 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:13:57" (1/1) ... [2022-10-16 05:13:57,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:13:57" (1/1) ... [2022-10-16 05:13:57,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:13:57" (1/1) ... [2022-10-16 05:13:57,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:13:57" (1/1) ... [2022-10-16 05:13:57,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:13:57" (1/1) ... [2022-10-16 05:13:57,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:13:57" (1/1) ... [2022-10-16 05:13:57,956 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:13:57" (1/1) ... [2022-10-16 05:13:57,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:13:57" (1/1) ... [2022-10-16 05:13:57,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-16 05:13:57,961 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-16 05:13:57,961 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-16 05:13:57,961 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-16 05:13:57,962 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:13:57" (1/1) ... [2022-10-16 05:13:57,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 05:13:57,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:13:58,002 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 05:13:58,012 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 05:13:58,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-16 05:13:58,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-16 05:13:58,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-16 05:13:58,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-16 05:13:58,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-16 05:13:58,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-16 05:13:58,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-16 05:13:58,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-16 05:13:58,150 INFO L235 CfgBuilder]: Building ICFG [2022-10-16 05:13:58,153 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-16 05:13:58,446 INFO L276 CfgBuilder]: Performing block encoding [2022-10-16 05:13:58,455 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-16 05:13:58,455 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-10-16 05:13:58,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:13:58 BoogieIcfgContainer [2022-10-16 05:13:58,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-16 05:13:58,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-16 05:13:58,461 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-16 05:13:58,468 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-16 05:13:58,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 05:13:57" (1/3) ... [2022-10-16 05:13:58,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3262be31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:13:58, skipping insertion in model container [2022-10-16 05:13:58,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:13:57" (2/3) ... [2022-10-16 05:13:58,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3262be31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:13:58, skipping insertion in model container [2022-10-16 05:13:58,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:13:58" (3/3) ... [2022-10-16 05:13:58,477 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_2_ground.i [2022-10-16 05:13:58,528 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-16 05:13:58,534 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-10-16 05:13:58,701 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-16 05:13:58,711 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;@7bc54ee4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-16 05:13:58,712 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-10-16 05:13:58,717 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 54 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:13:58,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 05:13:58,726 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:13:58,727 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 05:13:58,728 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:13:58,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:13:58,735 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-10-16 05:13:58,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:13:58,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209136388] [2022-10-16 05:13:58,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:13:58,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:13:58,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:13:59,044 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 05:13:59,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:13:59,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209136388] [2022-10-16 05:13:59,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209136388] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:13:59,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:13:59,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:13:59,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814166283] [2022-10-16 05:13:59,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:13:59,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:13:59,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:13:59,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:13:59,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:13:59,124 INFO L87 Difference]: Start difference. First operand has 55 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 54 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 05:13:59,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:13:59,209 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-10-16 05:13:59,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:13:59,212 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 05:13:59,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:13:59,222 INFO L225 Difference]: With dead ends: 46 [2022-10-16 05:13:59,222 INFO L226 Difference]: Without dead ends: 44 [2022-10-16 05:13:59,224 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 05:13:59,229 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 44 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:13:59,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 33 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:13:59,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-10-16 05:13:59,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-10-16 05:13:59,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:13:59,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2022-10-16 05:13:59,272 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 4 [2022-10-16 05:13:59,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:13:59,272 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2022-10-16 05:13:59,273 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 05:13:59,273 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2022-10-16 05:13:59,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 05:13:59,274 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:13:59,274 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 05:13:59,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-16 05:13:59,274 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:13:59,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:13:59,275 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-10-16 05:13:59,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:13:59,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962865340] [2022-10-16 05:13:59,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:13:59,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:13:59,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:13:59,460 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 05:13:59,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:13:59,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962865340] [2022-10-16 05:13:59,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962865340] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:13:59,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:13:59,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:13:59,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178144967] [2022-10-16 05:13:59,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:13:59,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:13:59,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:13:59,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:13:59,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:13:59,465 INFO L87 Difference]: Start difference. First operand 44 states and 49 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 05:13:59,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:13:59,522 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2022-10-16 05:13:59,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:13:59,523 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 05:13:59,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:13:59,524 INFO L225 Difference]: With dead ends: 48 [2022-10-16 05:13:59,524 INFO L226 Difference]: Without dead ends: 48 [2022-10-16 05:13:59,525 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 05:13:59,527 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 2 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:13:59,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 71 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:13:59,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-10-16 05:13:59,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-10-16 05:13:59,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.457142857142857) internal successors, (51), 45 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:13:59,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-10-16 05:13:59,537 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 4 [2022-10-16 05:13:59,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:13:59,537 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-10-16 05:13:59,538 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 05:13:59,538 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-10-16 05:13:59,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-16 05:13:59,538 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:13:59,539 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-10-16 05:13:59,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-16 05:13:59,539 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:13:59,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:13:59,540 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2022-10-16 05:13:59,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:13:59,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468154691] [2022-10-16 05:13:59,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:13:59,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:13:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:13:59,839 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 05:13:59,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:13:59,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468154691] [2022-10-16 05:13:59,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468154691] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:13:59,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769707652] [2022-10-16 05:13:59,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:13:59,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:13:59,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:13:59,843 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 05:13:59,855 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 05:13:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:13:59,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-16 05:13:59,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:14:00,024 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 05:14:00,096 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 05:14:00,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:14:00,216 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 05:14:00,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769707652] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:14:00,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:14:00,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-10-16 05:14:00,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965401601] [2022-10-16 05:14:00,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:14:00,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 05:14:00,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:14:00,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 05:14:00,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-16 05:14:00,223 INFO L87 Difference]: Start difference. First operand 46 states and 51 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 05:14:00,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:14:00,464 INFO L93 Difference]: Finished difference Result 128 states and 145 transitions. [2022-10-16 05:14:00,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 05:14:00,465 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 05:14:00,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:14:00,467 INFO L225 Difference]: With dead ends: 128 [2022-10-16 05:14:00,468 INFO L226 Difference]: Without dead ends: 128 [2022-10-16 05:14:00,468 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 05:14:00,470 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 132 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 05:14:00,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 126 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 05:14:00,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-10-16 05:14:00,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 58. [2022-10-16 05:14:00,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 57 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:00,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2022-10-16 05:14:00,483 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 8 [2022-10-16 05:14:00,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:14:00,484 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2022-10-16 05:14:00,485 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 05:14:00,485 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2022-10-16 05:14:00,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-16 05:14:00,486 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:14:00,486 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:14:00,528 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 05:14:00,699 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 05:14:00,700 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:14:00,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:14:00,702 INFO L85 PathProgramCache]: Analyzing trace with hash -169937429, now seen corresponding path program 1 times [2022-10-16 05:14:00,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:14:00,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776137965] [2022-10-16 05:14:00,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:00,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:14:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-16 05:14:00,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:14:00,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776137965] [2022-10-16 05:14:00,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776137965] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:14:00,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:14:00,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-16 05:14:00,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547808302] [2022-10-16 05:14:00,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:14:00,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 05:14:00,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:14:00,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 05:14:00,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-16 05:14:00,937 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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 05:14:01,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:14:01,030 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2022-10-16 05:14:01,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 05:14:01,031 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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 15 [2022-10-16 05:14:01,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:14:01,039 INFO L225 Difference]: With dead ends: 70 [2022-10-16 05:14:01,039 INFO L226 Difference]: Without dead ends: 70 [2022-10-16 05:14:01,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-16 05:14:01,049 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 51 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:14:01,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 53 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:14:01,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-10-16 05:14:01,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2022-10-16 05:14:01,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 57 states have (on average 1.3333333333333333) internal successors, (76), 67 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:01,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2022-10-16 05:14:01,072 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 15 [2022-10-16 05:14:01,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:14:01,073 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2022-10-16 05:14:01,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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 05:14:01,073 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2022-10-16 05:14:01,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-16 05:14:01,075 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:14:01,075 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:14:01,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-16 05:14:01,076 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:14:01,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:14:01,077 INFO L85 PathProgramCache]: Analyzing trace with hash -101875087, now seen corresponding path program 1 times [2022-10-16 05:14:01,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:14:01,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771471836] [2022-10-16 05:14:01,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:01,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:14:01,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:01,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-16 05:14:01,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:14:01,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771471836] [2022-10-16 05:14:01,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771471836] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:14:01,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:14:01,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-16 05:14:01,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605642315] [2022-10-16 05:14:01,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:14:01,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:14:01,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:14:01,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:14:01,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:14:01,165 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:01,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:14:01,185 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2022-10-16 05:14:01,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:14:01,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-10-16 05:14:01,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:14:01,188 INFO L225 Difference]: With dead ends: 87 [2022-10-16 05:14:01,188 INFO L226 Difference]: Without dead ends: 87 [2022-10-16 05:14:01,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:14:01,196 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 19 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:14:01,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 112 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:14:01,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-10-16 05:14:01,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 74. [2022-10-16 05:14:01,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 63 states have (on average 1.3650793650793651) internal successors, (86), 73 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:01,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions. [2022-10-16 05:14:01,220 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 17 [2022-10-16 05:14:01,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:14:01,221 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 86 transitions. [2022-10-16 05:14:01,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:01,221 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions. [2022-10-16 05:14:01,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-16 05:14:01,224 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:14:01,224 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:14:01,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-16 05:14:01,224 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:14:01,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:14:01,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1472642266, now seen corresponding path program 1 times [2022-10-16 05:14:01,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:14:01,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928520589] [2022-10-16 05:14:01,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:01,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:14:01,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:01,303 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:14:01,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:14:01,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928520589] [2022-10-16 05:14:01,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928520589] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:14:01,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855581669] [2022-10-16 05:14:01,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:01,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:14:01,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:14:01,307 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 05:14:01,315 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 05:14:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:01,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-16 05:14:01,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:14:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:14:01,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:14:01,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:14:01,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855581669] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:14:01,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:14:01,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-10-16 05:14:01,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705950873] [2022-10-16 05:14:01,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:14:01,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-16 05:14:01,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:14:01,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-16 05:14:01,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-16 05:14:01,497 INFO L87 Difference]: Start difference. First operand 74 states and 86 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:01,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:14:01,539 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2022-10-16 05:14:01,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 05:14:01,539 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-10-16 05:14:01,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:14:01,540 INFO L225 Difference]: With dead ends: 82 [2022-10-16 05:14:01,540 INFO L226 Difference]: Without dead ends: 82 [2022-10-16 05:14:01,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 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 05:14:01,542 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 30 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:14:01,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 93 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:14:01,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-10-16 05:14:01,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2022-10-16 05:14:01,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 70 states have (on average 1.3142857142857143) internal successors, (92), 80 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:01,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2022-10-16 05:14:01,551 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 20 [2022-10-16 05:14:01,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:14:01,552 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2022-10-16 05:14:01,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:01,552 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2022-10-16 05:14:01,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-16 05:14:01,553 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:14:01,553 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2022-10-16 05:14:01,592 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 05:14:01,767 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,SelfDestructingSolverStorable5 [2022-10-16 05:14:01,768 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:14:01,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:14:01,769 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2022-10-16 05:14:01,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:14:01,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553209166] [2022-10-16 05:14:01,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:01,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:14:01,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:01,984 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 05:14:01,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:14:01,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553209166] [2022-10-16 05:14:01,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553209166] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:14:01,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259531092] [2022-10-16 05:14:01,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:14:01,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:14:01,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:14:01,987 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 05:14:02,011 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 05:14:02,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:14:02,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:14:02,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-16 05:14:02,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:14:02,067 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 05:14:02,302 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 05:14:02,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:14:02,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259531092] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:14:02,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:14:02,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2022-10-16 05:14:02,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873417167] [2022-10-16 05:14:02,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:14:02,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 05:14:02,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:14:02,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 05:14:02,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-10-16 05:14:02,305 INFO L87 Difference]: Start difference. First operand 81 states and 92 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 05:14:02,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:14:02,399 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2022-10-16 05:14:02,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 05:14:02,399 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 05:14:02,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:14:02,400 INFO L225 Difference]: With dead ends: 80 [2022-10-16 05:14:02,401 INFO L226 Difference]: Without dead ends: 80 [2022-10-16 05:14:02,401 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 05:14:02,402 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:14:02,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 64 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:14:02,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-10-16 05:14:02,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-10-16 05:14:02,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 70 states have (on average 1.2857142857142858) internal successors, (90), 79 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:02,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 90 transitions. [2022-10-16 05:14:02,423 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 90 transitions. Word has length 20 [2022-10-16 05:14:02,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:14:02,423 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 90 transitions. [2022-10-16 05:14:02,424 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 05:14:02,424 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 90 transitions. [2022-10-16 05:14:02,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-10-16 05:14:02,425 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:14:02,425 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:14:02,464 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 05:14:02,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:14:02,627 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:14:02,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:14:02,628 INFO L85 PathProgramCache]: Analyzing trace with hash 2031105074, now seen corresponding path program 2 times [2022-10-16 05:14:02,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:14:02,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717809938] [2022-10-16 05:14:02,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:02,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:14:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:02,802 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:14:02,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:14:02,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717809938] [2022-10-16 05:14:02,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717809938] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:14:02,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78933326] [2022-10-16 05:14:02,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:14:02,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:14:02,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:14:02,805 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 05:14:02,837 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 05:14:02,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:14:02,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:14:02,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-16 05:14:02,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:14:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:14:02,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:14:03,107 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:14:03,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78933326] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:14:03,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:14:03,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-10-16 05:14:03,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045998593] [2022-10-16 05:14:03,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:14:03,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-16 05:14:03,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:14:03,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-16 05:14:03,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-16 05:14:03,112 INFO L87 Difference]: Start difference. First operand 80 states and 90 transitions. Second operand has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:03,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:14:03,205 INFO L93 Difference]: Finished difference Result 112 states and 122 transitions. [2022-10-16 05:14:03,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-16 05:14:03,207 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-10-16 05:14:03,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:14:03,208 INFO L225 Difference]: With dead ends: 112 [2022-10-16 05:14:03,208 INFO L226 Difference]: Without dead ends: 112 [2022-10-16 05:14:03,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-16 05:14:03,210 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 63 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:14:03,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 100 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:14:03,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-10-16 05:14:03,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-10-16 05:14:03,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 102 states have (on average 1.196078431372549) internal successors, (122), 111 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:03,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 122 transitions. [2022-10-16 05:14:03,237 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 122 transitions. Word has length 36 [2022-10-16 05:14:03,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:14:03,238 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 122 transitions. [2022-10-16 05:14:03,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:03,238 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 122 transitions. [2022-10-16 05:14:03,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-10-16 05:14:03,244 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:14:03,245 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:14:03,290 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 05:14:03,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:14:03,462 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:14:03,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:14:03,463 INFO L85 PathProgramCache]: Analyzing trace with hash -2033496502, now seen corresponding path program 3 times [2022-10-16 05:14:03,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:14:03,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390216647] [2022-10-16 05:14:03,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:03,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:14:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:03,952 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 05:14:03,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:14:03,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390216647] [2022-10-16 05:14:03,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390216647] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:14:03,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798921436] [2022-10-16 05:14:03,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 05:14:03,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:14:03,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:14:03,955 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 05:14:03,983 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 05:14:04,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-16 05:14:04,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:14:04,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-16 05:14:04,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:14:04,068 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 05:14:04,393 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-10-16 05:14:04,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:14:04,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798921436] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:14:04,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:14:04,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [17] total 21 [2022-10-16 05:14:04,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145467770] [2022-10-16 05:14:04,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:14:04,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-16 05:14:04,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:14:04,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-16 05:14:04,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2022-10-16 05:14:04,396 INFO L87 Difference]: Start difference. First operand 112 states and 122 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 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 05:14:04,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:14:04,455 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2022-10-16 05:14:04,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 05:14:04,456 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 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 68 [2022-10-16 05:14:04,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:14:04,457 INFO L225 Difference]: With dead ends: 110 [2022-10-16 05:14:04,457 INFO L226 Difference]: Without dead ends: 110 [2022-10-16 05:14:04,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2022-10-16 05:14:04,459 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 61 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:14:04,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 69 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:14:04,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-10-16 05:14:04,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 97. [2022-10-16 05:14:04,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 93 states have (on average 1.118279569892473) internal successors, (104), 96 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:04,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 104 transitions. [2022-10-16 05:14:04,465 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 104 transitions. Word has length 68 [2022-10-16 05:14:04,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:14:04,465 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 104 transitions. [2022-10-16 05:14:04,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 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 05:14:04,466 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 104 transitions. [2022-10-16 05:14:04,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-10-16 05:14:04,467 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:14:04,467 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:14:04,505 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 05:14:04,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:14:04,682 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:14:04,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:14:04,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1954187593, now seen corresponding path program 1 times [2022-10-16 05:14:04,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:14:04,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314084281] [2022-10-16 05:14:04,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:04,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:14:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:04,800 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-10-16 05:14:04,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:14:04,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314084281] [2022-10-16 05:14:04,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314084281] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:14:04,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441517651] [2022-10-16 05:14:04,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:04,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:14:04,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:14:04,803 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 05:14:04,828 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 05:14:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:04,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-16 05:14:04,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:14:05,114 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 05:14:05,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:14:05,536 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 05:14:05,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441517651] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:14:05,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:14:05,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 17, 17] total 34 [2022-10-16 05:14:05,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375243683] [2022-10-16 05:14:05,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:14:05,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-10-16 05:14:05,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:14:05,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-10-16 05:14:05,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-10-16 05:14:05,541 INFO L87 Difference]: Start difference. First operand 97 states and 104 transitions. Second operand has 34 states, 34 states have (on average 4.235294117647059) internal successors, (144), 34 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:05,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:14:05,741 INFO L93 Difference]: Finished difference Result 190 states and 200 transitions. [2022-10-16 05:14:05,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-10-16 05:14:05,742 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.235294117647059) internal successors, (144), 34 states have internal predecessors, (144), 0 states have call successors, (0), 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 72 [2022-10-16 05:14:05,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:14:05,743 INFO L225 Difference]: With dead ends: 190 [2022-10-16 05:14:05,743 INFO L226 Difference]: Without dead ends: 190 [2022-10-16 05:14:05,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-10-16 05:14:05,745 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 122 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 05:14:05,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 205 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 05:14:05,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-10-16 05:14:05,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 175. [2022-10-16 05:14:05,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 171 states have (on average 1.0701754385964912) internal successors, (183), 174 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:05,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 183 transitions. [2022-10-16 05:14:05,752 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 183 transitions. Word has length 72 [2022-10-16 05:14:05,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:14:05,752 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 183 transitions. [2022-10-16 05:14:05,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.235294117647059) internal successors, (144), 34 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:05,753 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 183 transitions. [2022-10-16 05:14:05,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-10-16 05:14:05,755 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:14:05,755 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:14:05,795 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 05:14:05,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:14:05,970 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:14:05,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:14:05,971 INFO L85 PathProgramCache]: Analyzing trace with hash 179500150, now seen corresponding path program 2 times [2022-10-16 05:14:05,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:14:05,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142670420] [2022-10-16 05:14:05,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:05,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:14:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1778 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2022-10-16 05:14:06,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:14:06,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142670420] [2022-10-16 05:14:06,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142670420] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:14:06,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386842243] [2022-10-16 05:14:06,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:14:06,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:14:06,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:14:06,442 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 05:14:06,464 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 05:14:06,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-16 05:14:06,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:14:06,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-16 05:14:06,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:14:06,565 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 05:14:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1778 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1778 trivial. 0 not checked. [2022-10-16 05:14:07,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:14:07,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386842243] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:14:07,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:14:07,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-10-16 05:14:07,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587360013] [2022-10-16 05:14:07,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:14:07,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 05:14:07,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:14:07,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 05:14:07,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-10-16 05:14:07,104 INFO L87 Difference]: Start difference. First operand 175 states and 183 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 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 05:14:07,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:14:07,138 INFO L93 Difference]: Finished difference Result 187 states and 196 transitions. [2022-10-16 05:14:07,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 05:14:07,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 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 141 [2022-10-16 05:14:07,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:14:07,140 INFO L225 Difference]: With dead ends: 187 [2022-10-16 05:14:07,140 INFO L226 Difference]: Without dead ends: 187 [2022-10-16 05:14:07,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-10-16 05:14:07,141 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 46 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:14:07,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 52 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:14:07,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-10-16 05:14:07,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2022-10-16 05:14:07,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 179 states have (on average 1.0837988826815643) internal successors, (194), 182 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:07,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 194 transitions. [2022-10-16 05:14:07,148 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 194 transitions. Word has length 141 [2022-10-16 05:14:07,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:14:07,148 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 194 transitions. [2022-10-16 05:14:07,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 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 05:14:07,149 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 194 transitions. [2022-10-16 05:14:07,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-10-16 05:14:07,150 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:14:07,151 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:14:07,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-16 05:14:07,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:14:07,365 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:14:07,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:14:07,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1269537387, now seen corresponding path program 1 times [2022-10-16 05:14:07,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:14:07,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872503679] [2022-10-16 05:14:07,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:07,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:14:07,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:07,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1778 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2022-10-16 05:14:07,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:14:07,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872503679] [2022-10-16 05:14:07,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872503679] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:14:07,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128389512] [2022-10-16 05:14:07,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:07,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:14:07,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:14:07,614 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 05:14:07,637 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 05:14:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:07,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-16 05:14:07,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:14:08,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1778 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-16 05:14:08,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:14:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1778 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-16 05:14:09,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128389512] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:14:09,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:14:09,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 33, 33] total 67 [2022-10-16 05:14:09,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096626947] [2022-10-16 05:14:09,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:14:09,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-10-16 05:14:09,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:14:09,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-10-16 05:14:09,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2025, Invalid=2397, Unknown=0, NotChecked=0, Total=4422 [2022-10-16 05:14:09,966 INFO L87 Difference]: Start difference. First operand 183 states and 194 transitions. Second operand has 67 states, 67 states have (on average 4.149253731343284) internal successors, (278), 67 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:10,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:14:10,425 INFO L93 Difference]: Finished difference Result 343 states and 358 transitions. [2022-10-16 05:14:10,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-10-16 05:14:10,426 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 4.149253731343284) internal successors, (278), 67 states have internal predecessors, (278), 0 states have call successors, (0), 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 142 [2022-10-16 05:14:10,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:14:10,428 INFO L225 Difference]: With dead ends: 343 [2022-10-16 05:14:10,429 INFO L226 Difference]: Without dead ends: 343 [2022-10-16 05:14:10,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2025, Invalid=2397, Unknown=0, NotChecked=0, Total=4422 [2022-10-16 05:14:10,432 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 230 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 05:14:10,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 321 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-16 05:14:10,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-10-16 05:14:10,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 328. [2022-10-16 05:14:10,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 324 states have (on average 1.0524691358024691) internal successors, (341), 327 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:10,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 341 transitions. [2022-10-16 05:14:10,441 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 341 transitions. Word has length 142 [2022-10-16 05:14:10,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:14:10,441 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 341 transitions. [2022-10-16 05:14:10,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 4.149253731343284) internal successors, (278), 67 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:10,442 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 341 transitions. [2022-10-16 05:14:10,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-10-16 05:14:10,445 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:14:10,445 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:14:10,487 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 05:14:10,658 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,SelfDestructingSolverStorable11 [2022-10-16 05:14:10,658 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:14:10,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:14:10,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1856054088, now seen corresponding path program 2 times [2022-10-16 05:14:10,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:14:10,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369068359] [2022-10-16 05:14:10,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:10,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:14:10,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:11,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7645 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2022-10-16 05:14:11,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:14:11,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369068359] [2022-10-16 05:14:11,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369068359] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:14:11,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319080105] [2022-10-16 05:14:11,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:14:11,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:14:11,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:14:11,134 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 05:14:11,145 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 05:14:11,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-16 05:14:11,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:14:11,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-16 05:14:11,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:14:11,273 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 05:14:12,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7645 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7645 trivial. 0 not checked. [2022-10-16 05:14:12,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:14:12,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319080105] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:14:12,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:14:12,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-10-16 05:14:12,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787868933] [2022-10-16 05:14:12,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:14:12,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 05:14:12,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:14:12,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 05:14:12,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-10-16 05:14:12,210 INFO L87 Difference]: Start difference. First operand 328 states and 341 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:12,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:14:12,282 INFO L93 Difference]: Finished difference Result 341 states and 352 transitions. [2022-10-16 05:14:12,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 05:14:12,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 275 [2022-10-16 05:14:12,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:14:12,285 INFO L225 Difference]: With dead ends: 341 [2022-10-16 05:14:12,285 INFO L226 Difference]: Without dead ends: 341 [2022-10-16 05:14:12,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-10-16 05:14:12,287 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 70 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:14:12,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 71 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:14:12,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-10-16 05:14:12,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 331. [2022-10-16 05:14:12,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 327 states have (on average 1.0519877675840978) internal successors, (344), 330 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:12,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 344 transitions. [2022-10-16 05:14:12,299 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 344 transitions. Word has length 275 [2022-10-16 05:14:12,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:14:12,300 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 344 transitions. [2022-10-16 05:14:12,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:12,300 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 344 transitions. [2022-10-16 05:14:12,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-10-16 05:14:12,307 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:14:12,307 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:14:12,352 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 05:14:12,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-16 05:14:12,522 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:14:12,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:14:12,523 INFO L85 PathProgramCache]: Analyzing trace with hash 298402748, now seen corresponding path program 1 times [2022-10-16 05:14:12,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:14:12,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621079831] [2022-10-16 05:14:12,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:12,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:14:12,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7645 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2022-10-16 05:14:13,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:14:13,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621079831] [2022-10-16 05:14:13,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621079831] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:14:13,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968502887] [2022-10-16 05:14:13,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:13,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:14:13,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:14:13,029 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 05:14:13,032 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 05:14:13,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:13,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 64 conjunts are in the unsatisfiable core [2022-10-16 05:14:13,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:14:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7645 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-10-16 05:14:15,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:14:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 7645 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-10-16 05:14:21,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968502887] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:14:21,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:14:21,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 65, 65] total 132 [2022-10-16 05:14:21,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335132720] [2022-10-16 05:14:21,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:14:21,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-10-16 05:14:21,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:14:21,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-10-16 05:14:21,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8142, Invalid=9150, Unknown=0, NotChecked=0, Total=17292 [2022-10-16 05:14:21,164 INFO L87 Difference]: Start difference. First operand 331 states and 344 transitions. Second operand has 132 states, 132 states have (on average 4.106060606060606) internal successors, (542), 132 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:22,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:14:22,370 INFO L93 Difference]: Finished difference Result 619 states and 636 transitions. [2022-10-16 05:14:22,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-10-16 05:14:22,371 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 4.106060606060606) internal successors, (542), 132 states have internal predecessors, (542), 0 states have call successors, (0), 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 278 [2022-10-16 05:14:22,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:14:22,375 INFO L225 Difference]: With dead ends: 619 [2022-10-16 05:14:22,375 INFO L226 Difference]: Without dead ends: 619 [2022-10-16 05:14:22,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=8142, Invalid=9150, Unknown=0, NotChecked=0, Total=17292 [2022-10-16 05:14:22,382 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 466 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-16 05:14:22,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 339 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-16 05:14:22,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-10-16 05:14:22,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 604. [2022-10-16 05:14:22,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 600 states have (on average 1.0316666666666667) internal successors, (619), 603 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:22,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 619 transitions. [2022-10-16 05:14:22,396 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 619 transitions. Word has length 278 [2022-10-16 05:14:22,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:14:22,396 INFO L495 AbstractCegarLoop]: Abstraction has 604 states and 619 transitions. [2022-10-16 05:14:22,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 4.106060606060606) internal successors, (542), 132 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:22,397 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 619 transitions. [2022-10-16 05:14:22,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2022-10-16 05:14:22,409 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:14:22,409 INFO L195 NwaCegarLoop]: trace histogram [126, 126, 126, 126, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:14:22,452 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 05:14:22,623 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,SelfDestructingSolverStorable13 [2022-10-16 05:14:22,624 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:14:22,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:14:22,625 INFO L85 PathProgramCache]: Analyzing trace with hash -966384007, now seen corresponding path program 2 times [2022-10-16 05:14:22,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:14:22,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107708923] [2022-10-16 05:14:22,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:22,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:14:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:23,698 INFO L134 CoverageAnalysis]: Checked inductivity of 31661 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 31626 trivial. 0 not checked. [2022-10-16 05:14:23,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:14:23,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107708923] [2022-10-16 05:14:23,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107708923] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:14:23,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940262913] [2022-10-16 05:14:23,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:14:23,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:14:23,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:14:23,701 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 05:14:23,723 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 05:14:24,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:14:24,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:14:24,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 1900 conjuncts, 128 conjunts are in the unsatisfiable core [2022-10-16 05:14:24,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:14:31,971 INFO L134 CoverageAnalysis]: Checked inductivity of 31661 backedges. 0 proven. 31626 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-10-16 05:14:31,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:14:53,859 INFO L134 CoverageAnalysis]: Checked inductivity of 31661 backedges. 0 proven. 31626 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-10-16 05:14:53,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940262913] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:14:53,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:14:53,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 129, 129] total 261 [2022-10-16 05:14:53,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318987544] [2022-10-16 05:14:53,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:14:53,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 261 states [2022-10-16 05:14:53,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:14:53,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 261 interpolants. [2022-10-16 05:14:53,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32660, Invalid=35200, Unknown=0, NotChecked=0, Total=67860 [2022-10-16 05:14:53,883 INFO L87 Difference]: Start difference. First operand 604 states and 619 transitions. Second operand has 261 states, 261 states have (on average 4.057471264367816) internal successors, (1059), 261 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:56,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:14:56,561 INFO L93 Difference]: Finished difference Result 1148 states and 1167 transitions. [2022-10-16 05:14:56,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2022-10-16 05:14:56,562 INFO L78 Accepts]: Start accepts. Automaton has has 261 states, 261 states have (on average 4.057471264367816) internal successors, (1059), 261 states have internal predecessors, (1059), 0 states have call successors, (0), 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 539 [2022-10-16 05:14:56,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:14:56,568 INFO L225 Difference]: With dead ends: 1148 [2022-10-16 05:14:56,568 INFO L226 Difference]: Without dead ends: 1148 [2022-10-16 05:14:56,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1083 GetRequests, 824 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=32660, Invalid=35200, Unknown=0, NotChecked=0, Total=67860 [2022-10-16 05:14:56,576 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1219 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1219 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-16 05:14:56,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1219 Valid, 434 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-16 05:14:56,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2022-10-16 05:14:56,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 1133. [2022-10-16 05:14:56,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1129 states have (on average 1.0186005314437556) internal successors, (1150), 1132 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:56,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 1150 transitions. [2022-10-16 05:14:56,596 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 1150 transitions. Word has length 539 [2022-10-16 05:14:56,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:14:56,597 INFO L495 AbstractCegarLoop]: Abstraction has 1133 states and 1150 transitions. [2022-10-16 05:14:56,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 261 states, 261 states have (on average 4.057471264367816) internal successors, (1059), 261 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:56,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 1150 transitions. [2022-10-16 05:14:56,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1057 [2022-10-16 05:14:56,659 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:14:56,660 INFO L195 NwaCegarLoop]: trace histogram [254, 254, 254, 254, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:14:56,696 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 05:14:56,873 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,SelfDestructingSolverStorable14 [2022-10-16 05:14:56,874 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:14:56,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:14:56,876 INFO L85 PathProgramCache]: Analyzing trace with hash -2061763556, now seen corresponding path program 3 times [2022-10-16 05:14:56,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:14:56,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318561529] [2022-10-16 05:14:56,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:56,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:14:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 128834 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 128778 trivial. 0 not checked. [2022-10-16 05:14:58,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:14:58,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318561529] [2022-10-16 05:14:58,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318561529] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:14:58,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454573129] [2022-10-16 05:14:58,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 05:14:58,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:14:58,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:14:58,930 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:14:58,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-16 05:14:59,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-10-16 05:14:59,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:14:59,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-16 05:14:59,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:14:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 128834 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 128778 trivial. 0 not checked. [2022-10-16 05:14:59,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:14:59,482 INFO L134 CoverageAnalysis]: Checked inductivity of 128834 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 128778 trivial. 0 not checked. [2022-10-16 05:14:59,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454573129] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:14:59,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:14:59,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-10-16 05:14:59,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766768255] [2022-10-16 05:14:59,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:14:59,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-16 05:14:59,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:14:59,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-16 05:14:59,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2022-10-16 05:14:59,487 INFO L87 Difference]: Start difference. First operand 1133 states and 1150 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:59,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:14:59,612 INFO L93 Difference]: Finished difference Result 1252 states and 1283 transitions. [2022-10-16 05:14:59,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-16 05:14:59,613 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1056 [2022-10-16 05:14:59,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:14:59,621 INFO L225 Difference]: With dead ends: 1252 [2022-10-16 05:14:59,621 INFO L226 Difference]: Without dead ends: 1252 [2022-10-16 05:14:59,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2118 GetRequests, 2105 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2022-10-16 05:14:59,622 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 344 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:14:59,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 141 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:14:59,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2022-10-16 05:14:59,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 1252. [2022-10-16 05:14:59,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 1248 states have (on average 1.0280448717948718) internal successors, (1283), 1251 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:59,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 1283 transitions. [2022-10-16 05:14:59,644 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 1283 transitions. Word has length 1056 [2022-10-16 05:14:59,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:14:59,646 INFO L495 AbstractCegarLoop]: Abstraction has 1252 states and 1283 transitions. [2022-10-16 05:14:59,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:14:59,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 1283 transitions. [2022-10-16 05:14:59,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1092 [2022-10-16 05:14:59,657 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:14:59,658 INFO L195 NwaCegarLoop]: trace histogram [254, 254, 254, 254, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:14:59,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-10-16 05:14:59,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-10-16 05:14:59,872 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:14:59,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:14:59,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1602665593, now seen corresponding path program 4 times [2022-10-16 05:14:59,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:14:59,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869017400] [2022-10-16 05:14:59,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:59,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:15:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:02,863 INFO L134 CoverageAnalysis]: Checked inductivity of 129121 backedges. 1 proven. 342 refuted. 0 times theorem prover too weak. 128778 trivial. 0 not checked. [2022-10-16 05:15:02,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:15:02,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869017400] [2022-10-16 05:15:02,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869017400] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:15:02,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163885704] [2022-10-16 05:15:02,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-16 05:15:02,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:15:02,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:15:02,866 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:15:02,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process