/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_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-16 05:14:04,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-16 05:14:04,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-16 05:14:04,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-16 05:14:04,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-16 05:14:04,791 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-16 05:14:04,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-16 05:14:04,805 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-16 05:14:04,809 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-16 05:14:04,816 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-16 05:14:04,818 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-16 05:14:04,822 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-16 05:14:04,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-16 05:14:04,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-16 05:14:04,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-16 05:14:04,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-16 05:14:04,850 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-16 05:14:04,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-16 05:14:04,856 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-16 05:14:04,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-16 05:14:04,869 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-16 05:14:04,871 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-16 05:14:04,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-16 05:14:04,876 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-16 05:14:04,888 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-16 05:14:04,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-16 05:14:04,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-16 05:14:04,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-16 05:14:04,906 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 05:14:04,965 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-16 05:14:04,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-16 05:14:04,967 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-16 05:14:04,967 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-16 05:14:04,970 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-16 05:14:04,970 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-16 05:14:04,973 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-16 05:14:04,974 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-16 05:14:04,974 INFO L138 SettingsManager]: * Use SBE=true [2022-10-16 05:14:04,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-16 05:14:04,976 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-16 05:14:04,976 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-16 05:14:04,977 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-16 05:14:04,977 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-16 05:14:04,977 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-16 05:14:04,977 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-16 05:14:04,978 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-16 05:14:04,978 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-16 05:14:04,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-16 05:14:04,978 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-16 05:14:04,979 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-16 05:14:04,979 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-16 05:14:04,979 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-16 05:14:04,980 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-16 05:14:04,980 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-16 05:14:04,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 05:14:04,981 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-16 05:14:04,981 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-16 05:14:04,981 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-16 05:14:04,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-16 05:14:04,982 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-16 05:14:05,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-16 05:14:05,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-16 05:14:05,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-16 05:14:05,468 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-16 05:14:05,468 INFO L275 PluginConnector]: CDTParser initialized [2022-10-16 05:14:05,470 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i [2022-10-16 05:14:05,550 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51fbc3c59/4bf7f194376c4a789630b45c85c335bf/FLAG0fb40332b [2022-10-16 05:14:06,122 INFO L306 CDTParser]: Found 1 translation units. [2022-10-16 05:14:06,123 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i [2022-10-16 05:14:06,132 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51fbc3c59/4bf7f194376c4a789630b45c85c335bf/FLAG0fb40332b [2022-10-16 05:14:06,480 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51fbc3c59/4bf7f194376c4a789630b45c85c335bf [2022-10-16 05:14:06,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-16 05:14:06,492 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-16 05:14:06,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-16 05:14:06,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-16 05:14:06,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-16 05:14:06,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:14:06" (1/1) ... [2022-10-16 05:14:06,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e475f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:14:06, skipping insertion in model container [2022-10-16 05:14:06,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:14:06" (1/1) ... [2022-10-16 05:14:06,516 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-16 05:14:06,539 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-16 05:14:06,780 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_ground-1.i[820,833] [2022-10-16 05:14:06,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 05:14:06,826 INFO L203 MainTranslator]: Completed pre-run [2022-10-16 05:14:06,844 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_ground-1.i[820,833] [2022-10-16 05:14:06,873 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 05:14:06,895 INFO L208 MainTranslator]: Completed translation [2022-10-16 05:14:06,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:14:06 WrapperNode [2022-10-16 05:14:06,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-16 05:14:06,899 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-16 05:14:06,900 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-16 05:14:06,900 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-16 05:14:06,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:14:06" (1/1) ... [2022-10-16 05:14:06,929 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:14:06" (1/1) ... [2022-10-16 05:14:06,957 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 82 [2022-10-16 05:14:06,957 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-16 05:14:06,958 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-16 05:14:06,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-16 05:14:06,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-16 05:14:06,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:14:06" (1/1) ... [2022-10-16 05:14:06,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:14:06" (1/1) ... [2022-10-16 05:14:06,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:14:06" (1/1) ... [2022-10-16 05:14:06,972 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:14:06" (1/1) ... [2022-10-16 05:14:06,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:14:06" (1/1) ... [2022-10-16 05:14:06,984 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:14:06" (1/1) ... [2022-10-16 05:14:06,985 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:14:06" (1/1) ... [2022-10-16 05:14:06,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:14:06" (1/1) ... [2022-10-16 05:14:06,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-16 05:14:06,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-16 05:14:06,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-16 05:14:06,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-16 05:14:06,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:14:06" (1/1) ... [2022-10-16 05:14:06,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 05:14:07,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:14:07,033 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 05:14:07,053 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 05:14:07,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-16 05:14:07,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-16 05:14:07,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-16 05:14:07,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-16 05:14:07,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-16 05:14:07,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-16 05:14:07,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-16 05:14:07,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-16 05:14:07,177 INFO L235 CfgBuilder]: Building ICFG [2022-10-16 05:14:07,179 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-16 05:14:07,537 INFO L276 CfgBuilder]: Performing block encoding [2022-10-16 05:14:07,547 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-16 05:14:07,547 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-10-16 05:14:07,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:14:07 BoogieIcfgContainer [2022-10-16 05:14:07,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-16 05:14:07,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-16 05:14:07,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-16 05:14:07,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-16 05:14:07,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 05:14:06" (1/3) ... [2022-10-16 05:14:07,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d90a6f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:14:07, skipping insertion in model container [2022-10-16 05:14:07,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:14:06" (2/3) ... [2022-10-16 05:14:07,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d90a6f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:14:07, skipping insertion in model container [2022-10-16 05:14:07,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:14:07" (3/3) ... [2022-10-16 05:14:07,561 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-1.i [2022-10-16 05:14:07,586 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-16 05:14:07,587 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-10-16 05:14:07,647 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-16 05:14:07,657 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;@50d1833d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-16 05:14:07,658 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-10-16 05:14:07,663 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 05:14:07,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 05:14:07,670 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:14:07,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 05:14:07,672 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 05:14:07,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:14:07,679 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-10-16 05:14:07,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:14:07,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244850819] [2022-10-16 05:14:07,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:07,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:14:07,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:07,956 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 05:14:07,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:14:07,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244850819] [2022-10-16 05:14:07,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244850819] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:14:07,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:14:07,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:14:07,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638032373] [2022-10-16 05:14:07,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:14:07,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:14:07,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:14:08,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:14:08,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:14:08,006 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 05:14:08,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:14:08,110 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-10-16 05:14:08,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:14:08,114 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 05:14:08,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:14:08,123 INFO L225 Difference]: With dead ends: 46 [2022-10-16 05:14:08,123 INFO L226 Difference]: Without dead ends: 44 [2022-10-16 05:14:08,126 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 05:14:08,131 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 44 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 05:14:08,133 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 05:14:08,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-10-16 05:14:08,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-10-16 05:14:08,170 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 05:14:08,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2022-10-16 05:14:08,173 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 4 [2022-10-16 05:14:08,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:14:08,174 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2022-10-16 05:14:08,174 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 05:14:08,174 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2022-10-16 05:14:08,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 05:14:08,175 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:14:08,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 05:14:08,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-16 05:14:08,176 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 05:14:08,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:14:08,177 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-10-16 05:14:08,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:14:08,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566355076] [2022-10-16 05:14:08,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:08,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:14:08,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:08,339 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 05:14:08,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:14:08,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566355076] [2022-10-16 05:14:08,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566355076] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:14:08,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:14:08,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:14:08,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183603522] [2022-10-16 05:14:08,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:14:08,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:14:08,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:14:08,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:14:08,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:14:08,347 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 05:14:08,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:14:08,448 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2022-10-16 05:14:08,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:14:08,449 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 05:14:08,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:14:08,451 INFO L225 Difference]: With dead ends: 48 [2022-10-16 05:14:08,451 INFO L226 Difference]: Without dead ends: 48 [2022-10-16 05:14:08,451 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 05:14:08,456 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 2 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:14:08,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 71 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:14:08,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-10-16 05:14:08,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-10-16 05:14:08,468 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 05:14:08,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-10-16 05:14:08,471 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 4 [2022-10-16 05:14:08,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:14:08,471 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-10-16 05:14:08,472 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 05:14:08,472 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-10-16 05:14:08,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-16 05:14:08,472 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:14:08,475 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-10-16 05:14:08,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-16 05:14:08,476 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 05:14:08,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:14:08,477 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2022-10-16 05:14:08,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:14:08,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718224715] [2022-10-16 05:14:08,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:08,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:14:08,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:08,800 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 05:14:08,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:14:08,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718224715] [2022-10-16 05:14:08,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718224715] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:14:08,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897745608] [2022-10-16 05:14:08,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:08,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:14:08,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:14:08,816 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 05:14:08,819 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 05:14:08,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:08,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-16 05:14:08,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:14:09,028 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 05:14:09,118 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 05:14:09,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:14:09,204 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 05:14:09,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897745608] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:14:09,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:14:09,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-10-16 05:14:09,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221362699] [2022-10-16 05:14:09,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:14:09,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 05:14:09,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:14:09,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 05:14:09,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-16 05:14:09,208 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 05:14:09,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:14:09,449 INFO L93 Difference]: Finished difference Result 128 states and 145 transitions. [2022-10-16 05:14:09,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 05:14:09,449 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 05:14:09,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:14:09,456 INFO L225 Difference]: With dead ends: 128 [2022-10-16 05:14:09,457 INFO L226 Difference]: Without dead ends: 128 [2022-10-16 05:14:09,461 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 05:14:09,471 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 132 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 05:14:09,472 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 05:14:09,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-10-16 05:14:09,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 58. [2022-10-16 05:14:09,487 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 05:14:09,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2022-10-16 05:14:09,491 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 8 [2022-10-16 05:14:09,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:14:09,492 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2022-10-16 05:14:09,493 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 05:14:09,493 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2022-10-16 05:14:09,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-16 05:14:09,494 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:14:09,495 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:14:09,536 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 05:14:09,709 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 05:14:09,710 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 05:14:09,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:14:09,712 INFO L85 PathProgramCache]: Analyzing trace with hash -169937429, now seen corresponding path program 1 times [2022-10-16 05:14:09,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:14:09,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534437472] [2022-10-16 05:14:09,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:09,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:14:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:09,865 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 05:14:09,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:14:09,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534437472] [2022-10-16 05:14:09,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534437472] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:14:09,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:14:09,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-16 05:14:09,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324913101] [2022-10-16 05:14:09,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:14:09,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 05:14:09,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:14:09,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 05:14:09,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-16 05:14:09,868 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 05:14:09,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:14:09,948 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2022-10-16 05:14:09,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 05:14:09,949 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 05:14:09,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:14:09,950 INFO L225 Difference]: With dead ends: 70 [2022-10-16 05:14:09,950 INFO L226 Difference]: Without dead ends: 70 [2022-10-16 05:14:09,951 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 05:14:09,952 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 05:14:09,953 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 05:14:09,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-10-16 05:14:09,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2022-10-16 05:14:09,959 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 05:14:09,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2022-10-16 05:14:09,961 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 15 [2022-10-16 05:14:09,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:14:09,961 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2022-10-16 05:14:09,962 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 05:14:09,962 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2022-10-16 05:14:09,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-16 05:14:09,963 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:14:09,963 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:14:09,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-16 05:14:09,963 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 05:14:09,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:14:09,964 INFO L85 PathProgramCache]: Analyzing trace with hash -101875087, now seen corresponding path program 1 times [2022-10-16 05:14:09,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:14:09,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159281214] [2022-10-16 05:14:09,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:09,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:14:09,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:10,018 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 05:14:10,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:14:10,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159281214] [2022-10-16 05:14:10,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159281214] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:14:10,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:14:10,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-16 05:14:10,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485563329] [2022-10-16 05:14:10,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:14:10,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:14:10,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:14:10,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:14:10,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:14:10,027 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 05:14:10,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:14:10,044 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2022-10-16 05:14:10,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:14:10,045 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 05:14:10,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:14:10,046 INFO L225 Difference]: With dead ends: 87 [2022-10-16 05:14:10,046 INFO L226 Difference]: Without dead ends: 87 [2022-10-16 05:14:10,047 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 05:14:10,051 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 05:14:10,052 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 05:14:10,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-10-16 05:14:10,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 74. [2022-10-16 05:14:10,066 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 05:14:10,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions. [2022-10-16 05:14:10,068 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 17 [2022-10-16 05:14:10,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:14:10,068 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 86 transitions. [2022-10-16 05:14:10,069 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 05:14:10,069 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions. [2022-10-16 05:14:10,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-16 05:14:10,070 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:14:10,070 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:14:10,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-16 05:14:10,070 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 05:14:10,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:14:10,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1472642266, now seen corresponding path program 1 times [2022-10-16 05:14:10,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:14:10,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93271481] [2022-10-16 05:14:10,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:10,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:14:10,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:10,152 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 05:14:10,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:14:10,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93271481] [2022-10-16 05:14:10,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93271481] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:14:10,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510421512] [2022-10-16 05:14:10,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:10,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:14:10,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:14:10,155 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 05:14:10,178 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 05:14:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:10,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-16 05:14:10,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:14:10,248 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 05:14:10,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:14:10,285 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 05:14:10,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510421512] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:14:10,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:14:10,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-10-16 05:14:10,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417280783] [2022-10-16 05:14:10,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:14:10,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-16 05:14:10,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:14:10,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-16 05:14:10,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-16 05:14:10,289 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 05:14:10,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:14:10,339 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2022-10-16 05:14:10,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 05:14:10,340 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 05:14:10,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:14:10,341 INFO L225 Difference]: With dead ends: 82 [2022-10-16 05:14:10,341 INFO L226 Difference]: Without dead ends: 82 [2022-10-16 05:14:10,342 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 05:14:10,343 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 05:14:10,344 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 05:14:10,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-10-16 05:14:10,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2022-10-16 05:14:10,350 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 05:14:10,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2022-10-16 05:14:10,351 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 20 [2022-10-16 05:14:10,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:14:10,352 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2022-10-16 05:14:10,352 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 05:14:10,352 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2022-10-16 05:14:10,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-16 05:14:10,353 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:14:10,353 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2022-10-16 05:14:10,392 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 05:14:10,569 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 05:14:10,570 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 05:14:10,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:14:10,571 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2022-10-16 05:14:10,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:14:10,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355572073] [2022-10-16 05:14:10,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:10,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:14:10,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:10,786 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 05:14:10,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:14:10,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355572073] [2022-10-16 05:14:10,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355572073] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:14:10,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133918754] [2022-10-16 05:14:10,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:14:10,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:14:10,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:14:10,789 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 05:14:10,794 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 05:14:10,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:14:10,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:14:10,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-16 05:14:10,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:14:10,873 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 05:14:11,153 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 05:14:11,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:14:11,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133918754] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:14:11,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:14:11,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2022-10-16 05:14:11,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624628768] [2022-10-16 05:14:11,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:14:11,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 05:14:11,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:14:11,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 05:14:11,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-10-16 05:14:11,159 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 05:14:11,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:14:11,237 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2022-10-16 05:14:11,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 05:14:11,238 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 05:14:11,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:14:11,240 INFO L225 Difference]: With dead ends: 80 [2022-10-16 05:14:11,240 INFO L226 Difference]: Without dead ends: 80 [2022-10-16 05:14:11,240 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 05:14:11,242 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 05:14:11,242 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 05:14:11,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-10-16 05:14:11,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-10-16 05:14:11,262 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 05:14:11,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 90 transitions. [2022-10-16 05:14:11,266 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 90 transitions. Word has length 20 [2022-10-16 05:14:11,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:14:11,267 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 90 transitions. [2022-10-16 05:14:11,267 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 05:14:11,267 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 90 transitions. [2022-10-16 05:14:11,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-10-16 05:14:11,270 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:14:11,270 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:14:11,309 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 05:14:11,472 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 05:14:11,473 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 05:14:11,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:14:11,475 INFO L85 PathProgramCache]: Analyzing trace with hash 2031105074, now seen corresponding path program 2 times [2022-10-16 05:14:11,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:14:11,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287117222] [2022-10-16 05:14:11,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:11,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:14:11,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:11,624 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 05:14:11,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:14:11,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287117222] [2022-10-16 05:14:11,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287117222] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:14:11,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088756830] [2022-10-16 05:14:11,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:14:11,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:14:11,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:14:11,627 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 05:14:11,636 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 05:14:11,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:14:11,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:14:11,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-16 05:14:11,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:14:11,769 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 05:14:11,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:14:11,898 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 05:14:11,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088756830] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:14:11,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:14:11,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-10-16 05:14:11,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445815650] [2022-10-16 05:14:11,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:14:11,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-16 05:14:11,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:14:11,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-16 05:14:11,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-16 05:14:11,905 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 05:14:11,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:14:11,992 INFO L93 Difference]: Finished difference Result 112 states and 122 transitions. [2022-10-16 05:14:11,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-16 05:14:11,993 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 05:14:11,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:14:11,997 INFO L225 Difference]: With dead ends: 112 [2022-10-16 05:14:11,998 INFO L226 Difference]: Without dead ends: 112 [2022-10-16 05:14:11,998 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 05:14:11,999 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 05:14:12,000 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 05:14:12,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-10-16 05:14:12,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-10-16 05:14:12,018 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 05:14:12,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 122 transitions. [2022-10-16 05:14:12,021 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 122 transitions. Word has length 36 [2022-10-16 05:14:12,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:14:12,024 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 122 transitions. [2022-10-16 05:14:12,024 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 05:14:12,024 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 122 transitions. [2022-10-16 05:14:12,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-10-16 05:14:12,026 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:14:12,027 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:14:12,063 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 05:14:12,227 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 05:14:12,228 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 05:14:12,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:14:12,229 INFO L85 PathProgramCache]: Analyzing trace with hash -2033496502, now seen corresponding path program 3 times [2022-10-16 05:14:12,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:14:12,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561387219] [2022-10-16 05:14:12,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:12,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:14:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:12,647 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 05:14:12,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:14:12,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561387219] [2022-10-16 05:14:12,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561387219] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:14:12,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433703531] [2022-10-16 05:14:12,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 05:14:12,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:14:12,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:14:12,652 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 05:14:12,668 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 05:14:12,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-16 05:14:12,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:14:12,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-16 05:14:12,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:14:12,728 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 05:14:13,049 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 05:14:13,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:14:13,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433703531] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:14:13,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:14:13,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [17] total 21 [2022-10-16 05:14:13,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035712151] [2022-10-16 05:14:13,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:14:13,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-16 05:14:13,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:14:13,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-16 05:14:13,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2022-10-16 05:14:13,053 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 05:14:13,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:14:13,121 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2022-10-16 05:14:13,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 05:14:13,121 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 05:14:13,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:14:13,123 INFO L225 Difference]: With dead ends: 110 [2022-10-16 05:14:13,123 INFO L226 Difference]: Without dead ends: 110 [2022-10-16 05:14:13,123 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 05:14:13,124 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 61 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 05:14:13,125 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 05:14:13,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-10-16 05:14:13,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 97. [2022-10-16 05:14:13,128 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 05:14:13,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 104 transitions. [2022-10-16 05:14:13,129 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 104 transitions. Word has length 68 [2022-10-16 05:14:13,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:14:13,130 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 104 transitions. [2022-10-16 05:14:13,130 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 05:14:13,130 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 104 transitions. [2022-10-16 05:14:13,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-10-16 05:14:13,133 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:14:13,133 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 05:14:13,180 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 05:14:13,346 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 05:14:13,346 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 05:14:13,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:14:13,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1954187593, now seen corresponding path program 1 times [2022-10-16 05:14:13,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:14:13,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379608732] [2022-10-16 05:14:13,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:13,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:14:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:13,464 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 05:14:13,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:14:13,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379608732] [2022-10-16 05:14:13,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379608732] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:14:13,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206217087] [2022-10-16 05:14:13,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:13,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:14:13,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:14:13,466 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 05:14:13,485 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 05:14:13,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:13,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-16 05:14:13,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:14:13,794 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 05:14:13,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:14:14,201 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 05:14:14,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206217087] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:14:14,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:14:14,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 17, 17] total 34 [2022-10-16 05:14:14,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108155719] [2022-10-16 05:14:14,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:14:14,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-10-16 05:14:14,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:14:14,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-10-16 05:14:14,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-10-16 05:14:14,205 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 05:14:14,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:14:14,409 INFO L93 Difference]: Finished difference Result 190 states and 200 transitions. [2022-10-16 05:14:14,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-10-16 05:14:14,409 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 05:14:14,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:14:14,411 INFO L225 Difference]: With dead ends: 190 [2022-10-16 05:14:14,411 INFO L226 Difference]: Without dead ends: 190 [2022-10-16 05:14:14,412 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 05:14:14,413 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 05:14:14,413 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 05:14:14,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-10-16 05:14:14,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 175. [2022-10-16 05:14:14,418 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 05:14:14,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 183 transitions. [2022-10-16 05:14:14,419 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 183 transitions. Word has length 72 [2022-10-16 05:14:14,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:14:14,420 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 183 transitions. [2022-10-16 05:14:14,420 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 05:14:14,420 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 183 transitions. [2022-10-16 05:14:14,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-10-16 05:14:14,422 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:14:14,422 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 05:14:14,462 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 05:14:14,637 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 05:14:14,638 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 05:14:14,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:14:14,639 INFO L85 PathProgramCache]: Analyzing trace with hash 179500150, now seen corresponding path program 2 times [2022-10-16 05:14:14,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:14:14,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547862864] [2022-10-16 05:14:14,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:14,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:14:14,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:15,033 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 05:14:15,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:14:15,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547862864] [2022-10-16 05:14:15,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547862864] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:14:15,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001330912] [2022-10-16 05:14:15,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:14:15,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:14:15,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:14:15,035 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 05:14:15,055 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 05:14:15,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-16 05:14:15,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:14:15,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-16 05:14:15,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:14:15,125 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 05:14:15,636 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 05:14:15,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:14:15,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001330912] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:14:15,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:14:15,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-10-16 05:14:15,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110726510] [2022-10-16 05:14:15,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:14:15,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 05:14:15,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:14:15,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 05:14:15,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-10-16 05:14:15,640 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 05:14:15,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:14:15,673 INFO L93 Difference]: Finished difference Result 187 states and 196 transitions. [2022-10-16 05:14:15,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 05:14:15,674 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 05:14:15,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:14:15,676 INFO L225 Difference]: With dead ends: 187 [2022-10-16 05:14:15,676 INFO L226 Difference]: Without dead ends: 187 [2022-10-16 05:14:15,676 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 05:14:15,677 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 05:14:15,678 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 05:14:15,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-10-16 05:14:15,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2022-10-16 05:14:15,683 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 05:14:15,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 194 transitions. [2022-10-16 05:14:15,684 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 194 transitions. Word has length 141 [2022-10-16 05:14:15,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:14:15,685 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 194 transitions. [2022-10-16 05:14:15,685 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 05:14:15,685 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 194 transitions. [2022-10-16 05:14:15,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-10-16 05:14:15,687 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:14:15,687 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 05:14:15,728 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 05:14:15,900 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 05:14:15,900 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 05:14:15,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:14:15,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1269537387, now seen corresponding path program 1 times [2022-10-16 05:14:15,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:14:15,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258319298] [2022-10-16 05:14:15,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:15,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:14:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:16,129 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 05:14:16,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:14:16,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258319298] [2022-10-16 05:14:16,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258319298] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:14:16,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537377176] [2022-10-16 05:14:16,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:16,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:14:16,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:14:16,131 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 05:14:16,157 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 05:14:16,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:16,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-16 05:14:16,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:14:16,958 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 05:14:16,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:14:18,315 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 05:14:18,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537377176] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:14:18,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:14:18,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 33, 33] total 67 [2022-10-16 05:14:18,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348130699] [2022-10-16 05:14:18,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:14:18,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-10-16 05:14:18,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:14:18,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-10-16 05:14:18,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2025, Invalid=2397, Unknown=0, NotChecked=0, Total=4422 [2022-10-16 05:14:18,322 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 05:14:18,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:14:18,723 INFO L93 Difference]: Finished difference Result 343 states and 358 transitions. [2022-10-16 05:14:18,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-10-16 05:14:18,724 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 05:14:18,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:14:18,726 INFO L225 Difference]: With dead ends: 343 [2022-10-16 05:14:18,726 INFO L226 Difference]: Without dead ends: 343 [2022-10-16 05:14:18,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2025, Invalid=2397, Unknown=0, NotChecked=0, Total=4422 [2022-10-16 05:14:18,730 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 05:14:18,731 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 05:14:18,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-10-16 05:14:18,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 328. [2022-10-16 05:14:18,738 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 05:14:18,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 341 transitions. [2022-10-16 05:14:18,739 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 341 transitions. Word has length 142 [2022-10-16 05:14:18,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:14:18,740 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 341 transitions. [2022-10-16 05:14:18,741 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 05:14:18,741 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 341 transitions. [2022-10-16 05:14:18,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-10-16 05:14:18,749 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:14:18,750 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 05:14:18,792 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 05:14:18,965 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 05:14:18,965 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 05:14:18,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:14:18,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1856054088, now seen corresponding path program 2 times [2022-10-16 05:14:18,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:14:18,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836562521] [2022-10-16 05:14:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:18,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:14:19,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:19,488 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 05:14:19,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:14:19,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836562521] [2022-10-16 05:14:19,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836562521] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:14:19,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411467878] [2022-10-16 05:14:19,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:14:19,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:14:19,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:14:19,490 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 05:14:19,509 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 05:14:19,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-16 05:14:19,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:14:19,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-16 05:14:19,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:14:19,644 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 05:14:20,526 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 05:14:20,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:14:20,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411467878] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:14:20,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:14:20,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-10-16 05:14:20,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613225355] [2022-10-16 05:14:20,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:14:20,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 05:14:20,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:14:20,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 05:14:20,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-10-16 05:14:20,529 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 05:14:20,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:14:20,585 INFO L93 Difference]: Finished difference Result 341 states and 352 transitions. [2022-10-16 05:14:20,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 05:14:20,585 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 05:14:20,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:14:20,588 INFO L225 Difference]: With dead ends: 341 [2022-10-16 05:14:20,588 INFO L226 Difference]: Without dead ends: 341 [2022-10-16 05:14:20,588 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 05:14:20,589 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, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:14:20,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 71 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:14:20,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-10-16 05:14:20,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 331. [2022-10-16 05:14:20,597 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 05:14:20,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 344 transitions. [2022-10-16 05:14:20,598 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 344 transitions. Word has length 275 [2022-10-16 05:14:20,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:14:20,599 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 344 transitions. [2022-10-16 05:14:20,599 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 05:14:20,599 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 344 transitions. [2022-10-16 05:14:20,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-10-16 05:14:20,603 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:14:20,604 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 05:14:20,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-10-16 05:14:20,817 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 05:14:20,818 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 05:14:20,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:14:20,819 INFO L85 PathProgramCache]: Analyzing trace with hash 298402748, now seen corresponding path program 1 times [2022-10-16 05:14:20,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:14:20,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106700681] [2022-10-16 05:14:20,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:20,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:14:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:21,265 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 05:14:21,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:14:21,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106700681] [2022-10-16 05:14:21,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106700681] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:14:21,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678574081] [2022-10-16 05:14:21,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:21,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:14:21,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:14:21,267 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 05:14:21,285 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 05:14:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:21,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 64 conjunts are in the unsatisfiable core [2022-10-16 05:14:21,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:14:23,542 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 05:14:23,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:14:29,263 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 05:14:29,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678574081] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:14:29,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:14:29,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 65, 65] total 132 [2022-10-16 05:14:29,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538077922] [2022-10-16 05:14:29,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:14:29,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-10-16 05:14:29,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:14:29,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-10-16 05:14:29,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8142, Invalid=9150, Unknown=0, NotChecked=0, Total=17292 [2022-10-16 05:14:29,278 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 05:14:30,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:14:30,234 INFO L93 Difference]: Finished difference Result 619 states and 636 transitions. [2022-10-16 05:14:30,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-10-16 05:14:30,235 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 05:14:30,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:14:30,239 INFO L225 Difference]: With dead ends: 619 [2022-10-16 05:14:30,239 INFO L226 Difference]: Without dead ends: 619 [2022-10-16 05:14:30,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=8142, Invalid=9150, Unknown=0, NotChecked=0, Total=17292 [2022-10-16 05:14:30,245 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, 0.4s IncrementalHoareTripleChecker+Time [2022-10-16 05:14:30,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 339 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-16 05:14:30,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-10-16 05:14:30,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 604. [2022-10-16 05:14:30,256 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 05:14:30,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 619 transitions. [2022-10-16 05:14:30,259 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 619 transitions. Word has length 278 [2022-10-16 05:14:30,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:14:30,259 INFO L495 AbstractCegarLoop]: Abstraction has 604 states and 619 transitions. [2022-10-16 05:14:30,260 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 05:14:30,260 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 619 transitions. [2022-10-16 05:14:30,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2022-10-16 05:14:30,270 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:14:30,271 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 05:14:30,305 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 05:14:30,485 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 05:14:30,486 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 05:14:30,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:14:30,487 INFO L85 PathProgramCache]: Analyzing trace with hash -966384007, now seen corresponding path program 2 times [2022-10-16 05:14:30,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:14:30,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191682497] [2022-10-16 05:14:30,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:14:30,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:14:30,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:14:31,423 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 05:14:31,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:14:31,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191682497] [2022-10-16 05:14:31,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191682497] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:14:31,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826074176] [2022-10-16 05:14:31,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:14:31,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:14:31,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:14:31,425 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 05:14:31,447 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 05:14:31,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:14:31,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:14:31,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 1900 conjuncts, 128 conjunts are in the unsatisfiable core [2022-10-16 05:14:31,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:14:39,478 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 05:14:39,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:15:01,407 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 05:15:01,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826074176] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:15:01,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:15:01,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 129, 129] total 261 [2022-10-16 05:15:01,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199849694] [2022-10-16 05:15:01,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:15:01,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 261 states [2022-10-16 05:15:01,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:15:01,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 261 interpolants. [2022-10-16 05:15:01,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32660, Invalid=35200, Unknown=0, NotChecked=0, Total=67860 [2022-10-16 05:15:01,454 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 05:15:04,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:15:04,248 INFO L93 Difference]: Finished difference Result 1148 states and 1167 transitions. [2022-10-16 05:15:04,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2022-10-16 05:15:04,249 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 05:15:04,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:15:04,255 INFO L225 Difference]: With dead ends: 1148 [2022-10-16 05:15:04,255 INFO L226 Difference]: Without dead ends: 1148 [2022-10-16 05:15:04,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1083 GetRequests, 824 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=32660, Invalid=35200, Unknown=0, NotChecked=0, Total=67860 [2022-10-16 05:15:04,263 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 05:15:04,263 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 05:15:04,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2022-10-16 05:15:04,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 1133. [2022-10-16 05:15:04,281 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 05:15:04,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 1150 transitions. [2022-10-16 05:15:04,284 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 1150 transitions. Word has length 539 [2022-10-16 05:15:04,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:15:04,285 INFO L495 AbstractCegarLoop]: Abstraction has 1133 states and 1150 transitions. [2022-10-16 05:15:04,286 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 05:15:04,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 1150 transitions. [2022-10-16 05:15:04,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1057 [2022-10-16 05:15:04,330 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:15:04,331 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 05:15:04,367 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 05:15:04,545 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 05:15:04,546 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 05:15:04,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:15:04,547 INFO L85 PathProgramCache]: Analyzing trace with hash -2061763556, now seen corresponding path program 3 times [2022-10-16 05:15:04,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:15:04,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378722597] [2022-10-16 05:15:04,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:04,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:15:04,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:06,538 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 05:15:06,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:15:06,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378722597] [2022-10-16 05:15:06,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378722597] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:15:06,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813772429] [2022-10-16 05:15:06,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 05:15:06,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:15:06,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:15:06,541 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 05:15:06,549 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 05:15:06,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-10-16 05:15:06,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:15:06,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-16 05:15:06,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:15:08,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-10-16 05:15:08,494 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 05:15:08,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-10-16 05:15:08,543 INFO L134 CoverageAnalysis]: Checked inductivity of 128834 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 128816 trivial. 0 not checked. [2022-10-16 05:15:08,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:15:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 128834 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 128816 trivial. 0 not checked. [2022-10-16 05:15:08,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813772429] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-16 05:15:08,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-16 05:15:08,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [8, 12] total 25 [2022-10-16 05:15:08,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762290534] [2022-10-16 05:15:08,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:15:08,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-16 05:15:08,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:15:08,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-16 05:15:08,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2022-10-16 05:15:08,835 INFO L87 Difference]: Start difference. First operand 1133 states and 1150 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:15:09,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:15:09,285 INFO L93 Difference]: Finished difference Result 1182 states and 1200 transitions. [2022-10-16 05:15:09,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-16 05:15:09,286 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 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 05:15:09,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:15:09,292 INFO L225 Difference]: With dead ends: 1182 [2022-10-16 05:15:09,293 INFO L226 Difference]: Without dead ends: 1182 [2022-10-16 05:15:09,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2128 GetRequests, 2094 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=242, Invalid=948, Unknown=0, NotChecked=0, Total=1190 [2022-10-16 05:15:09,294 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 284 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 05:15:09,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 191 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 05:15:09,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2022-10-16 05:15:09,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1135. [2022-10-16 05:15:09,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1131 states have (on average 1.0185676392572944) internal successors, (1152), 1134 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:15:09,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1152 transitions. [2022-10-16 05:15:09,313 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1152 transitions. Word has length 1056 [2022-10-16 05:15:09,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:15:09,315 INFO L495 AbstractCegarLoop]: Abstraction has 1135 states and 1152 transitions. [2022-10-16 05:15:09,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:15:09,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1152 transitions. [2022-10-16 05:15:09,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1061 [2022-10-16 05:15:09,325 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:15:09,326 INFO L195 NwaCegarLoop]: trace histogram [254, 254, 254, 254, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:15:09,352 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 05:15:09,536 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 05:15:09,537 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:15:09,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:15:09,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1766436910, now seen corresponding path program 1 times [2022-10-16 05:15:09,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:15:09,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032445693] [2022-10-16 05:15:09,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:09,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:15:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 128837 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 128781 trivial. 0 not checked. [2022-10-16 05:15:11,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:15:11,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032445693] [2022-10-16 05:15:11,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032445693] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:15:11,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031076806] [2022-10-16 05:15:11,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:11,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:15:11,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:15:11,385 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 05:15:11,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-10-16 05:15:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:12,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 3717 conjuncts, 256 conjunts are in the unsatisfiable core [2022-10-16 05:15:12,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:15:42,101 INFO L134 CoverageAnalysis]: Checked inductivity of 128837 backedges. 0 proven. 128778 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-10-16 05:15:42,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:17:09,945 INFO L134 CoverageAnalysis]: Checked inductivity of 128837 backedges. 0 proven. 128778 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-10-16 05:17:09,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031076806] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:17:09,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:17:09,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 257, 257] total 518 [2022-10-16 05:17:09,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957904722] [2022-10-16 05:17:09,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:17:09,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 518 states [2022-10-16 05:17:09,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:17:09,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 518 interpolants. [2022-10-16 05:17:09,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130843, Invalid=136963, Unknown=0, NotChecked=0, Total=267806 [2022-10-16 05:17:09,997 INFO L87 Difference]: Start difference. First operand 1135 states and 1152 transitions. Second operand has 518 states, 518 states have (on average 4.0347490347490345) internal successors, (2090), 518 states have internal predecessors, (2090), 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 05:17:24,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:17:24,142 INFO L93 Difference]: Finished difference Result 2191 states and 2212 transitions. [2022-10-16 05:17:24,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 518 states. [2022-10-16 05:17:24,144 INFO L78 Accepts]: Start accepts. Automaton has has 518 states, 518 states have (on average 4.0347490347490345) internal successors, (2090), 518 states have internal predecessors, (2090), 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 1060 [2022-10-16 05:17:24,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:17:24,155 INFO L225 Difference]: With dead ends: 2191 [2022-10-16 05:17:24,155 INFO L226 Difference]: Without dead ends: 2191 [2022-10-16 05:17:24,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2126 GetRequests, 1610 SyntacticMatches, 0 SemanticMatches, 516 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2550 ImplicationChecksByTransitivity, 115.0s TimeCoverageRelationStatistics Valid=130843, Invalid=136963, Unknown=0, NotChecked=0, Total=267806 [2022-10-16 05:17:24,172 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 2447 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 1628 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2447 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 1899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 1628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-10-16 05:17:24,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2447 Valid, 705 Invalid, 1899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 1628 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-10-16 05:17:24,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2191 states. [2022-10-16 05:17:24,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2191 to 2176. [2022-10-16 05:17:24,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2172 states have (on average 1.0105893186003683) internal successors, (2195), 2175 states have internal predecessors, (2195), 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 05:17:24,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 2195 transitions. [2022-10-16 05:17:24,214 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 2195 transitions. Word has length 1060 [2022-10-16 05:17:24,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:17:24,216 INFO L495 AbstractCegarLoop]: Abstraction has 2176 states and 2195 transitions. [2022-10-16 05:17:24,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 518 states, 518 states have (on average 4.0347490347490345) internal successors, (2090), 518 states have internal predecessors, (2090), 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 05:17:24,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 2195 transitions. [2022-10-16 05:17:24,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2090 [2022-10-16 05:17:24,261 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:17:24,262 INFO L195 NwaCegarLoop]: trace histogram [510, 510, 510, 510, 6, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:17:24,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-10-16 05:17:24,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-10-16 05:17:24,463 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:17:24,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:17:24,465 INFO L85 PathProgramCache]: Analyzing trace with hash 248151403, now seen corresponding path program 2 times [2022-10-16 05:17:24,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:17:24,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74265021] [2022-10-16 05:17:24,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:17:24,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:17:25,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:17:28,583 INFO L134 CoverageAnalysis]: Checked inductivity of 519775 backedges. 1 proven. 81 refuted. 0 times theorem prover too weak. 519693 trivial. 0 not checked. [2022-10-16 05:17:28,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:17:28,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74265021] [2022-10-16 05:17:28,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74265021] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:17:28,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183649646] [2022-10-16 05:17:28,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:17:28,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:17:28,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:17:28,585 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:17:28,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-10-16 05:17:30,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:17:30,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:17:30,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 7317 conjuncts, 512 conjunts are in the unsatisfiable core [2022-10-16 05:17:30,318 INFO L286 TraceCheckSpWp]: Computing forward predicates...