/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/standard_init8_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 18:12:20,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 18:12:20,894 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 18:12:20,950 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 18:12:20,950 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 18:12:20,952 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 18:12:20,954 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 18:12:20,956 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 18:12:20,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 18:12:20,960 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 18:12:20,961 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 18:12:20,963 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 18:12:20,963 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 18:12:20,965 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 18:12:20,966 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 18:12:20,968 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 18:12:20,969 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 18:12:20,970 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 18:12:20,975 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 18:12:20,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 18:12:20,989 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 18:12:20,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 18:12:20,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 18:12:20,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 18:12:21,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-15 18:12:21,025 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 18:12:21,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 18:12:21,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 18:12:21,030 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-15 18:12:21,095 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 18:12:21,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 18:12:21,099 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 18:12:21,099 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 18:12:21,100 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 18:12:21,102 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 18:12:21,104 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 18:12:21,104 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 18:12:21,104 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 18:12:21,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 18:12:21,105 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 18:12:21,105 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 18:12:21,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 18:12:21,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 18:12:21,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 18:12:21,107 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 18:12:21,107 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 18:12:21,107 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 18:12:21,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 18:12:21,108 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 18:12:21,108 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 18:12:21,108 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 18:12:21,109 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 18:12:21,109 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 18:12:21,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 18:12:21,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:12:21,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 18:12:21,110 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 18:12:21,111 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 18:12:21,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 18:12:21,111 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 18:12:21,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 18:12:21,588 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 18:12:21,592 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 18:12:21,593 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 18:12:21,595 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 18:12:21,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init8_ground-1.i [2022-10-15 18:12:21,693 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be5d7c4e0/24722a1d816747aca5d700b38b6c9228/FLAG376cf7451 [2022-10-15 18:12:22,477 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 18:12:22,478 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init8_ground-1.i [2022-10-15 18:12:22,490 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be5d7c4e0/24722a1d816747aca5d700b38b6c9228/FLAG376cf7451 [2022-10-15 18:12:22,804 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be5d7c4e0/24722a1d816747aca5d700b38b6c9228 [2022-10-15 18:12:22,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 18:12:22,827 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 18:12:22,829 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 18:12:22,829 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 18:12:22,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 18:12:22,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:12:22" (1/1) ... [2022-10-15 18:12:22,837 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45a1c900 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:12:22, skipping insertion in model container [2022-10-15 18:12:22,837 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:12:22" (1/1) ... [2022-10-15 18:12:22,846 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 18:12:22,866 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 18:12:23,042 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/standard_init8_ground-1.i[816,829] [2022-10-15 18:12:23,071 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:12:23,086 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 18:12:23,109 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/standard_init8_ground-1.i[816,829] [2022-10-15 18:12:23,147 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:12:23,181 INFO L208 MainTranslator]: Completed translation [2022-10-15 18:12:23,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:12:23 WrapperNode [2022-10-15 18:12:23,182 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 18:12:23,184 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 18:12:23,184 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 18:12:23,185 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 18:12:23,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:12:23" (1/1) ... [2022-10-15 18:12:23,209 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:12:23" (1/1) ... [2022-10-15 18:12:23,240 INFO L138 Inliner]: procedures = 15, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 89 [2022-10-15 18:12:23,241 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 18:12:23,242 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 18:12:23,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 18:12:23,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 18:12:23,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:12:23" (1/1) ... [2022-10-15 18:12:23,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:12:23" (1/1) ... [2022-10-15 18:12:23,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:12:23" (1/1) ... [2022-10-15 18:12:23,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:12:23" (1/1) ... [2022-10-15 18:12:23,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:12:23" (1/1) ... [2022-10-15 18:12:23,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:12:23" (1/1) ... [2022-10-15 18:12:23,274 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:12:23" (1/1) ... [2022-10-15 18:12:23,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:12:23" (1/1) ... [2022-10-15 18:12:23,278 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 18:12:23,279 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 18:12:23,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 18:12:23,280 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 18:12:23,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:12:23" (1/1) ... [2022-10-15 18:12:23,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:12:23,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:12:23,340 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-15 18:12:23,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-15 18:12:23,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 18:12:23,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 18:12:23,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 18:12:23,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 18:12:23,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 18:12:23,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 18:12:23,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 18:12:23,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 18:12:23,569 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 18:12:23,573 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 18:12:24,153 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 18:12:24,164 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 18:12:24,164 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-10-15 18:12:24,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:12:24 BoogieIcfgContainer [2022-10-15 18:12:24,167 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 18:12:24,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 18:12:24,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 18:12:24,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 18:12:24,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 06:12:22" (1/3) ... [2022-10-15 18:12:24,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a66528f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:12:24, skipping insertion in model container [2022-10-15 18:12:24,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:12:23" (2/3) ... [2022-10-15 18:12:24,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a66528f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:12:24, skipping insertion in model container [2022-10-15 18:12:24,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:12:24" (3/3) ... [2022-10-15 18:12:24,180 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_init8_ground-1.i [2022-10-15 18:12:24,208 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 18:12:24,208 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-10-15 18:12:24,278 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 18:12:24,289 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;@dc739fb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 18:12:24,290 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-10-15 18:12:24,296 INFO L276 IsEmpty]: Start isEmpty. Operand has 65 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 64 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:24,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:12:24,305 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:24,306 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:12:24,307 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)] === [2022-10-15 18:12:24,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:24,316 INFO L85 PathProgramCache]: Analyzing trace with hash 925797, now seen corresponding path program 1 times [2022-10-15 18:12:24,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:24,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181471242] [2022-10-15 18:12:24,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:24,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:24,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:12:24,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:24,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181471242] [2022-10-15 18:12:24,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181471242] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:12:24,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:12:24,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:12:24,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681726420] [2022-10-15 18:12:24,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:12:24,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:12:24,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:24,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:12:24,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:12:24,655 INFO L87 Difference]: Start difference. First operand has 65 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 64 states have internal predecessors, (83), 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) [2022-10-15 18:12:24,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:24,742 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2022-10-15 18:12:24,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:12:24,745 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 [2022-10-15 18:12:24,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:24,757 INFO L225 Difference]: With dead ends: 56 [2022-10-15 18:12:24,757 INFO L226 Difference]: Without dead ends: 54 [2022-10-15 18:12:24,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:12:24,765 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 57 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 46 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 [2022-10-15 18:12:24,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 46 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:12:24,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-10-15 18:12:24,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-10-15 18:12:24,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.441860465116279) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:24,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-10-15 18:12:24,818 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 4 [2022-10-15 18:12:24,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:24,819 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-10-15 18:12:24,819 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) [2022-10-15 18:12:24,820 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-10-15 18:12:24,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:12:24,820 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:24,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:12:24,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 18:12:24,821 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)] === [2022-10-15 18:12:24,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:24,823 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2022-10-15 18:12:24,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:24,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809321834] [2022-10-15 18:12:24,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:24,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:12:25,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:25,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809321834] [2022-10-15 18:12:25,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809321834] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:12:25,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:12:25,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:12:25,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408937824] [2022-10-15 18:12:25,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:12:25,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:12:25,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:25,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:12:25,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:12:25,074 INFO L87 Difference]: Start difference. First operand 54 states and 62 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) [2022-10-15 18:12:25,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:25,237 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2022-10-15 18:12:25,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:12:25,239 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 [2022-10-15 18:12:25,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:25,242 INFO L225 Difference]: With dead ends: 57 [2022-10-15 18:12:25,242 INFO L226 Difference]: Without dead ends: 57 [2022-10-15 18:12:25,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:12:25,250 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:25,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 69 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:12:25,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-10-15 18:12:25,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-10-15 18:12:25,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 55 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:25,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2022-10-15 18:12:25,272 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 4 [2022-10-15 18:12:25,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:25,273 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2022-10-15 18:12:25,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:25,273 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2022-10-15 18:12:25,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 18:12:25,275 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:25,275 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-10-15 18:12:25,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 18:12:25,276 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)] === [2022-10-15 18:12:25,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:25,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1810599630, now seen corresponding path program 1 times [2022-10-15 18:12:25,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:25,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909332233] [2022-10-15 18:12:25,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:25,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:25,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:12:25,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:25,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909332233] [2022-10-15 18:12:25,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909332233] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:12:25,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218376245] [2022-10-15 18:12:25,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:25,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:25,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:12:25,463 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:12:25,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-15 18:12:25,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:25,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-15 18:12:25,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:12:25,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 18:12:25,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:12:25,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:12:25,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:12:25,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218376245] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:12:25,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:12:25,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-10-15 18:12:25,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75137167] [2022-10-15 18:12:25,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:12:25,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-15 18:12:25,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:25,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-15 18:12:25,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-15 18:12:25,793 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:26,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:26,002 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2022-10-15 18:12:26,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 18:12:26,003 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-15 18:12:26,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:26,006 INFO L225 Difference]: With dead ends: 67 [2022-10-15 18:12:26,006 INFO L226 Difference]: Without dead ends: 67 [2022-10-15 18:12:26,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-10-15 18:12:26,009 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 8 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:26,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 71 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:12:26,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-10-15 18:12:26,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2022-10-15 18:12:26,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 54 states have (on average 1.3888888888888888) internal successors, (75), 64 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:26,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2022-10-15 18:12:26,020 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 7 [2022-10-15 18:12:26,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:26,020 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2022-10-15 18:12:26,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:26,021 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2022-10-15 18:12:26,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-15 18:12:26,021 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:26,022 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 18:12:26,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-10-15 18:12:26,236 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 [2022-10-15 18:12:26,237 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)] === [2022-10-15 18:12:26,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:26,239 INFO L85 PathProgramCache]: Analyzing trace with hash -65957008, now seen corresponding path program 1 times [2022-10-15 18:12:26,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:26,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76217250] [2022-10-15 18:12:26,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:26,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:26,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-15 18:12:26,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:26,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76217250] [2022-10-15 18:12:26,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76217250] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:12:26,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:12:26,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 18:12:26,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064151021] [2022-10-15 18:12:26,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:12:26,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 18:12:26,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:26,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 18:12:26,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 18:12:26,479 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:26,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:26,668 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2022-10-15 18:12:26,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 18:12:26,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 12 [2022-10-15 18:12:26,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:26,673 INFO L225 Difference]: With dead ends: 86 [2022-10-15 18:12:26,674 INFO L226 Difference]: Without dead ends: 86 [2022-10-15 18:12:26,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 18:12:26,684 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 64 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:26,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 38 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:12:26,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-10-15 18:12:26,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2022-10-15 18:12:26,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 68 states have (on average 1.3088235294117647) internal successors, (89), 78 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:26,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2022-10-15 18:12:26,704 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 12 [2022-10-15 18:12:26,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:26,704 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2022-10-15 18:12:26,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:26,705 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2022-10-15 18:12:26,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-15 18:12:26,706 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:26,709 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:12:26,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 18:12:26,709 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 18:12:26,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:26,711 INFO L85 PathProgramCache]: Analyzing trace with hash -2125198987, now seen corresponding path program 1 times [2022-10-15 18:12:26,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:26,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577858586] [2022-10-15 18:12:26,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:26,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:12:26,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:26,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577858586] [2022-10-15 18:12:26,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577858586] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:12:26,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315924949] [2022-10-15 18:12:26,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:26,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:26,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:12:26,855 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:12:26,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-15 18:12:26,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:26,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-15 18:12:26,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:12:26,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:12:26,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:12:27,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:12:27,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315924949] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:12:27,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:12:27,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-10-15 18:12:27,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137534656] [2022-10-15 18:12:27,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:12:27,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 18:12:27,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:27,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 18:12:27,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-15 18:12:27,039 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:27,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:27,412 INFO L93 Difference]: Finished difference Result 211 states and 219 transitions. [2022-10-15 18:12:27,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 18:12:27,412 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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 [2022-10-15 18:12:27,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:27,415 INFO L225 Difference]: With dead ends: 211 [2022-10-15 18:12:27,415 INFO L226 Difference]: Without dead ends: 211 [2022-10-15 18:12:27,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-15 18:12:27,423 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 280 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:27,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 58 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 18:12:27,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-10-15 18:12:27,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 182. [2022-10-15 18:12:27,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 171 states have (on average 1.280701754385965) internal successors, (219), 181 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:27,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 219 transitions. [2022-10-15 18:12:27,459 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 219 transitions. Word has length 15 [2022-10-15 18:12:27,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:27,459 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 219 transitions. [2022-10-15 18:12:27,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:27,463 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 219 transitions. [2022-10-15 18:12:27,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-15 18:12:27,464 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:27,464 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1] [2022-10-15 18:12:27,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-15 18:12:27,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:27,667 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 18:12:27,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:27,669 INFO L85 PathProgramCache]: Analyzing trace with hash -278008218, now seen corresponding path program 2 times [2022-10-15 18:12:27,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:27,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490865265] [2022-10-15 18:12:27,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:27,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:27,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:27,944 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:12:27,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:27,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490865265] [2022-10-15 18:12:27,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490865265] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:12:27,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846968107] [2022-10-15 18:12:27,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:12:27,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:27,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:12:27,947 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:12:27,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-15 18:12:28,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:12:28,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:12:28,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-15 18:12:28,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:12:28,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 18:12:28,284 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:12:28,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:12:28,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846968107] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:12:28,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:12:28,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2022-10-15 18:12:28,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416305247] [2022-10-15 18:12:28,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:12:28,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 18:12:28,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:28,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 18:12:28,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-10-15 18:12:28,288 INFO L87 Difference]: Start difference. First operand 182 states and 219 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 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) [2022-10-15 18:12:28,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:28,732 INFO L93 Difference]: Finished difference Result 181 states and 203 transitions. [2022-10-15 18:12:28,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 18:12:28,732 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 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 16 [2022-10-15 18:12:28,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:28,734 INFO L225 Difference]: With dead ends: 181 [2022-10-15 18:12:28,734 INFO L226 Difference]: Without dead ends: 181 [2022-10-15 18:12:28,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-10-15 18:12:28,736 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 129 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:28,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 29 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-15 18:12:28,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-10-15 18:12:28,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2022-10-15 18:12:28,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 171 states have (on average 1.1871345029239766) internal successors, (203), 180 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:28,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 203 transitions. [2022-10-15 18:12:28,748 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 203 transitions. Word has length 16 [2022-10-15 18:12:28,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:28,749 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 203 transitions. [2022-10-15 18:12:28,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 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) [2022-10-15 18:12:28,749 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 203 transitions. [2022-10-15 18:12:28,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-15 18:12:28,750 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:28,751 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:12:28,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-15 18:12:28,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:28,964 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 18:12:28,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:28,966 INFO L85 PathProgramCache]: Analyzing trace with hash -2086175883, now seen corresponding path program 2 times [2022-10-15 18:12:28,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:28,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023421323] [2022-10-15 18:12:28,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:28,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:28,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:29,115 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:12:29,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:29,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023421323] [2022-10-15 18:12:29,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023421323] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:12:29,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710084730] [2022-10-15 18:12:29,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:12:29,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:29,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:12:29,118 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:12:29,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-15 18:12:29,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:12:29,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:12:29,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 18:12:29,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:12:29,232 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:12:29,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:12:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:12:29,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710084730] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:12:29,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:12:29,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-10-15 18:12:29,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295198160] [2022-10-15 18:12:29,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:12:29,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-15 18:12:29,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:29,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-15 18:12:29,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-15 18:12:29,353 INFO L87 Difference]: Start difference. First operand 181 states and 203 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:30,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:30,007 INFO L93 Difference]: Finished difference Result 387 states and 395 transitions. [2022-10-15 18:12:30,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-15 18:12:30,008 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 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 27 [2022-10-15 18:12:30,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:30,011 INFO L225 Difference]: With dead ends: 387 [2022-10-15 18:12:30,011 INFO L226 Difference]: Without dead ends: 387 [2022-10-15 18:12:30,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-15 18:12:30,013 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 511 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:30,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 72 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-15 18:12:30,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-10-15 18:12:30,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 373. [2022-10-15 18:12:30,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 363 states have (on average 1.0881542699724518) internal successors, (395), 372 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:30,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 395 transitions. [2022-10-15 18:12:30,031 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 395 transitions. Word has length 27 [2022-10-15 18:12:30,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:30,031 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 395 transitions. [2022-10-15 18:12:30,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:30,032 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 395 transitions. [2022-10-15 18:12:30,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-10-15 18:12:30,034 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:30,034 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:12:30,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-15 18:12:30,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:30,248 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)] === [2022-10-15 18:12:30,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:30,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1979539317, now seen corresponding path program 3 times [2022-10-15 18:12:30,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:30,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834376804] [2022-10-15 18:12:30,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:30,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:30,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:12:30,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:30,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834376804] [2022-10-15 18:12:30,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834376804] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:12:30,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639327968] [2022-10-15 18:12:30,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 18:12:30,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:30,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:12:30,673 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:12:30,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-15 18:12:30,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-15 18:12:30,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:12:30,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 18:12:30,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:12:30,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 18:12:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-10-15 18:12:31,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:12:31,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639327968] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:12:31,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:12:31,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [17] total 21 [2022-10-15 18:12:31,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248312500] [2022-10-15 18:12:31,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:12:31,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 18:12:31,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:31,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 18:12:31,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2022-10-15 18:12:31,070 INFO L87 Difference]: Start difference. First operand 373 states and 395 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:31,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:31,207 INFO L93 Difference]: Finished difference Result 366 states and 374 transitions. [2022-10-15 18:12:31,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 18:12:31,208 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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 51 [2022-10-15 18:12:31,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:31,211 INFO L225 Difference]: With dead ends: 366 [2022-10-15 18:12:31,211 INFO L226 Difference]: Without dead ends: 366 [2022-10-15 18:12:31,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2022-10-15 18:12:31,212 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 79 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:31,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 30 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:12:31,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-10-15 18:12:31,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 366. [2022-10-15 18:12:31,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 363 states have (on average 1.0303030303030303) internal successors, (374), 365 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:31,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 374 transitions. [2022-10-15 18:12:31,224 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 374 transitions. Word has length 51 [2022-10-15 18:12:31,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:31,225 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 374 transitions. [2022-10-15 18:12:31,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:31,225 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 374 transitions. [2022-10-15 18:12:31,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-10-15 18:12:31,234 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:31,235 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:12:31,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-15 18:12:31,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:31,451 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 18:12:31,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:31,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2023211414, now seen corresponding path program 1 times [2022-10-15 18:12:31,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:31,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55985865] [2022-10-15 18:12:31,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:31,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:33,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2296 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2296 trivial. 0 not checked. [2022-10-15 18:12:33,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:33,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55985865] [2022-10-15 18:12:33,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55985865] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:12:33,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:12:33,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 18:12:33,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438437884] [2022-10-15 18:12:33,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:12:33,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 18:12:33,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:33,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 18:12:33,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 18:12:33,321 INFO L87 Difference]: Start difference. First operand 366 states and 374 transitions. Second operand has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:33,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:33,358 INFO L93 Difference]: Finished difference Result 374 states and 382 transitions. [2022-10-15 18:12:33,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 18:12:33,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 4 states have internal predecessors, (44), 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 356 [2022-10-15 18:12:33,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:33,363 INFO L225 Difference]: With dead ends: 374 [2022-10-15 18:12:33,364 INFO L226 Difference]: Without dead ends: 374 [2022-10-15 18:12:33,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 18:12:33,365 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 24 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:33,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 78 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:12:33,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-10-15 18:12:33,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 368. [2022-10-15 18:12:33,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 365 states have (on average 1.0301369863013699) internal successors, (376), 367 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:33,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 376 transitions. [2022-10-15 18:12:33,381 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 376 transitions. Word has length 356 [2022-10-15 18:12:33,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:33,382 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 376 transitions. [2022-10-15 18:12:33,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:33,383 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 376 transitions. [2022-10-15 18:12:33,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-10-15 18:12:33,388 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:33,389 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:12:33,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-15 18:12:33,390 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 18:12:33,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:33,391 INFO L85 PathProgramCache]: Analyzing trace with hash -2079708124, now seen corresponding path program 1 times [2022-10-15 18:12:33,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:33,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715488202] [2022-10-15 18:12:33,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:33,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2296 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2009 trivial. 0 not checked. [2022-10-15 18:12:35,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:35,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715488202] [2022-10-15 18:12:35,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715488202] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:12:35,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615114852] [2022-10-15 18:12:35,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:35,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:35,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:12:35,364 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:12:35,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-15 18:12:35,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:35,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 1306 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-15 18:12:35,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:12:35,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2296 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2009 trivial. 0 not checked. [2022-10-15 18:12:35,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:12:36,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2296 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2009 trivial. 0 not checked. [2022-10-15 18:12:36,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615114852] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:12:36,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:12:36,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-10-15 18:12:36,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998482267] [2022-10-15 18:12:36,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:12:36,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-10-15 18:12:36,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:36,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-10-15 18:12:36,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-15 18:12:36,353 INFO L87 Difference]: Start difference. First operand 368 states and 376 transitions. Second operand has 33 states, 33 states have (on average 4.0606060606060606) internal successors, (134), 33 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:38,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:38,136 INFO L93 Difference]: Finished difference Result 752 states and 760 transitions. [2022-10-15 18:12:38,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-10-15 18:12:38,137 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.0606060606060606) internal successors, (134), 33 states have internal predecessors, (134), 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 359 [2022-10-15 18:12:38,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:38,144 INFO L225 Difference]: With dead ends: 752 [2022-10-15 18:12:38,144 INFO L226 Difference]: Without dead ends: 752 [2022-10-15 18:12:38,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 702 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-15 18:12:38,147 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1798 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 995 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1798 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 995 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:38,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1798 Valid, 72 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [995 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-10-15 18:12:38,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-10-15 18:12:38,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 752. [2022-10-15 18:12:38,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 749 states have (on average 1.014686248331108) internal successors, (760), 751 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:38,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 760 transitions. [2022-10-15 18:12:38,170 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 760 transitions. Word has length 359 [2022-10-15 18:12:38,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:38,171 INFO L495 AbstractCegarLoop]: Abstraction has 752 states and 760 transitions. [2022-10-15 18:12:38,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.0606060606060606) internal successors, (134), 33 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:38,171 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 760 transitions. [2022-10-15 18:12:38,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 744 [2022-10-15 18:12:38,195 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:38,196 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:12:38,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-15 18:12:38,410 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 [2022-10-15 18:12:38,411 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 18:12:38,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:38,413 INFO L85 PathProgramCache]: Analyzing trace with hash 2045470756, now seen corresponding path program 2 times [2022-10-15 18:12:38,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:38,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111931326] [2022-10-15 18:12:38,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:38,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:38,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:44,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10680 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 9345 trivial. 0 not checked. [2022-10-15 18:12:44,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:44,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111931326] [2022-10-15 18:12:44,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111931326] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:12:44,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451538552] [2022-10-15 18:12:44,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:12:44,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:44,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:12:44,447 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:12:44,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-15 18:12:45,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:12:45,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:12:45,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 2714 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-15 18:12:45,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:12:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 10680 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 9345 trivial. 0 not checked. [2022-10-15 18:12:45,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:12:47,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10680 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 9345 trivial. 0 not checked. [2022-10-15 18:12:47,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451538552] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:12:47,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:12:47,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-10-15 18:12:47,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233953778] [2022-10-15 18:12:47,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:12:47,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-10-15 18:12:47,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:47,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-10-15 18:12:47,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-15 18:12:47,212 INFO L87 Difference]: Start difference. First operand 752 states and 760 transitions. Second operand has 65 states, 65 states have (on average 3.5384615384615383) internal successors, (230), 65 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:51,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:51,858 INFO L93 Difference]: Finished difference Result 1520 states and 1528 transitions. [2022-10-15 18:12:51,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-10-15 18:12:51,866 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.5384615384615383) internal successors, (230), 65 states have internal predecessors, (230), 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 743 [2022-10-15 18:12:51,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:51,880 INFO L225 Difference]: With dead ends: 1520 [2022-10-15 18:12:51,880 INFO L226 Difference]: Without dead ends: 1520 [2022-10-15 18:12:51,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1517 GetRequests, 1454 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-15 18:12:51,885 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2790 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 1544 mSolverCounterSat, 1570 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2790 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 3114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1570 IncrementalHoareTripleChecker+Valid, 1544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:51,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2790 Valid, 114 Invalid, 3114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1570 Valid, 1544 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-10-15 18:12:51,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2022-10-15 18:12:51,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1520. [2022-10-15 18:12:51,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1517 states have (on average 1.007251153592617) internal successors, (1528), 1519 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:51,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 1528 transitions. [2022-10-15 18:12:51,919 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 1528 transitions. Word has length 743 [2022-10-15 18:12:51,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:51,919 INFO L495 AbstractCegarLoop]: Abstraction has 1520 states and 1528 transitions. [2022-10-15 18:12:51,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.5384615384615383) internal successors, (230), 65 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:51,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 1528 transitions. [2022-10-15 18:12:52,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1512 [2022-10-15 18:12:52,000 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:52,001 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:12:52,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-15 18:12:52,215 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 [2022-10-15 18:12:52,216 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 18:12:52,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:52,218 INFO L85 PathProgramCache]: Analyzing trace with hash 529915940, now seen corresponding path program 3 times [2022-10-15 18:12:52,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:52,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355347134] [2022-10-15 18:12:52,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:52,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:53,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:07,522 INFO L134 CoverageAnalysis]: Checked inductivity of 45880 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 40145 trivial. 0 not checked. [2022-10-15 18:13:07,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:07,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355347134] [2022-10-15 18:13:07,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355347134] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:13:07,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822436606] [2022-10-15 18:13:07,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 18:13:07,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:07,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:13:07,527 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:13:07,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process