/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/reducercommutativity/max60-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-16 02:20:46,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-16 02:20:46,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-16 02:20:46,822 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-16 02:20:46,822 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-16 02:20:46,827 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-16 02:20:46,832 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-16 02:20:46,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-16 02:20:46,861 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-16 02:20:46,868 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-16 02:20:46,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-16 02:20:46,873 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-16 02:20:46,873 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-16 02:20:46,876 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-16 02:20:46,879 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-16 02:20:46,886 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-16 02:20:46,888 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-16 02:20:46,889 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-16 02:20:46,893 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-16 02:20:46,903 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-16 02:20:46,905 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-16 02:20:46,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-16 02:20:46,910 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-16 02:20:46,912 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-16 02:20:46,921 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-16 02:20:46,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-16 02:20:46,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-16 02:20:46,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-16 02:20:46,937 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-16 02:20:46,976 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-16 02:20:46,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-16 02:20:46,977 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-16 02:20:46,977 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-16 02:20:46,978 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-16 02:20:46,979 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-16 02:20:46,979 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-16 02:20:46,980 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-16 02:20:46,980 INFO L138 SettingsManager]: * Use SBE=true [2022-10-16 02:20:46,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-16 02:20:46,980 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-16 02:20:46,981 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-16 02:20:46,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-16 02:20:46,981 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-16 02:20:46,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-16 02:20:46,981 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-16 02:20:46,982 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-16 02:20:46,982 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-16 02:20:46,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-16 02:20:46,982 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-16 02:20:46,983 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-16 02:20:46,983 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-16 02:20:46,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-16 02:20:46,983 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-16 02:20:46,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-16 02:20:46,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 02:20:46,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-16 02:20:46,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-16 02:20:46,984 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-16 02:20:46,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-16 02:20:46,985 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-16 02:20:47,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-16 02:20:47,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-16 02:20:47,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-16 02:20:47,452 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-16 02:20:47,453 INFO L275 PluginConnector]: CDTParser initialized [2022-10-16 02:20:47,455 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/max60-2.i [2022-10-16 02:20:47,552 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6c07040f/f5c8e2dbd76342b699d18d0176cc1d78/FLAG4ffc83df1 [2022-10-16 02:20:48,330 INFO L306 CDTParser]: Found 1 translation units. [2022-10-16 02:20:48,331 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/max60-2.i [2022-10-16 02:20:48,344 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6c07040f/f5c8e2dbd76342b699d18d0176cc1d78/FLAG4ffc83df1 [2022-10-16 02:20:48,683 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6c07040f/f5c8e2dbd76342b699d18d0176cc1d78 [2022-10-16 02:20:48,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-16 02:20:48,694 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-16 02:20:48,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-16 02:20:48,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-16 02:20:48,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-16 02:20:48,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:20:48" (1/1) ... [2022-10-16 02:20:48,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b07328b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:20:48, skipping insertion in model container [2022-10-16 02:20:48,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:20:48" (1/1) ... [2022-10-16 02:20:48,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-16 02:20:48,739 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-16 02:20:48,994 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/max60-2.i[1290,1303] [2022-10-16 02:20:48,998 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 02:20:49,008 INFO L203 MainTranslator]: Completed pre-run [2022-10-16 02:20:49,033 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/max60-2.i[1290,1303] [2022-10-16 02:20:49,034 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 02:20:49,051 INFO L208 MainTranslator]: Completed translation [2022-10-16 02:20:49,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:20:49 WrapperNode [2022-10-16 02:20:49,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-16 02:20:49,054 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-16 02:20:49,054 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-16 02:20:49,054 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-16 02:20:49,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:20:49" (1/1) ... [2022-10-16 02:20:49,071 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:20:49" (1/1) ... [2022-10-16 02:20:49,103 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-10-16 02:20:49,104 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-16 02:20:49,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-16 02:20:49,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-16 02:20:49,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-16 02:20:49,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:20:49" (1/1) ... [2022-10-16 02:20:49,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:20:49" (1/1) ... [2022-10-16 02:20:49,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:20:49" (1/1) ... [2022-10-16 02:20:49,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:20:49" (1/1) ... [2022-10-16 02:20:49,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:20:49" (1/1) ... [2022-10-16 02:20:49,132 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:20:49" (1/1) ... [2022-10-16 02:20:49,134 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:20:49" (1/1) ... [2022-10-16 02:20:49,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:20:49" (1/1) ... [2022-10-16 02:20:49,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-16 02:20:49,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-16 02:20:49,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-16 02:20:49,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-16 02:20:49,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:20:49" (1/1) ... [2022-10-16 02:20:49,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 02:20:49,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:20:49,185 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-16 02:20:49,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-16 02:20:49,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-16 02:20:49,238 INFO L130 BoogieDeclarations]: Found specification of procedure max [2022-10-16 02:20:49,238 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2022-10-16 02:20:49,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-16 02:20:49,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-16 02:20:49,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-16 02:20:49,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-16 02:20:49,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-16 02:20:49,239 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-16 02:20:49,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-16 02:20:49,321 INFO L235 CfgBuilder]: Building ICFG [2022-10-16 02:20:49,324 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-16 02:20:49,725 INFO L276 CfgBuilder]: Performing block encoding [2022-10-16 02:20:49,738 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-16 02:20:49,738 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-16 02:20:49,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:20:49 BoogieIcfgContainer [2022-10-16 02:20:49,742 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-16 02:20:49,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-16 02:20:49,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-16 02:20:49,751 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-16 02:20:49,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:20:48" (1/3) ... [2022-10-16 02:20:49,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@527184fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:20:49, skipping insertion in model container [2022-10-16 02:20:49,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:20:49" (2/3) ... [2022-10-16 02:20:49,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@527184fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:20:49, skipping insertion in model container [2022-10-16 02:20:49,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:20:49" (3/3) ... [2022-10-16 02:20:49,756 INFO L112 eAbstractionObserver]: Analyzing ICFG max60-2.i [2022-10-16 02:20:49,781 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-16 02:20:49,781 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2022-10-16 02:20:49,850 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-16 02:20:49,861 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;@79a003e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-16 02:20:49,861 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2022-10-16 02:20:49,868 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 62 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:20:49,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 02:20:49,877 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:20:49,878 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 02:20:49,879 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:20:49,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:20:49,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1849285, now seen corresponding path program 1 times [2022-10-16 02:20:49,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:20:49,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581348936] [2022-10-16 02:20:49,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:20:49,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:20:50,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:20:50,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:20:50,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:20:50,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581348936] [2022-10-16 02:20:50,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581348936] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:20:50,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 02:20:50,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 02:20:50,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656408872] [2022-10-16 02:20:50,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:20:50,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 02:20:50,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:20:50,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 02:20:50,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 02:20:50,250 INFO L87 Difference]: Start difference. First operand has 67 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 62 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:20:50,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:20:50,420 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2022-10-16 02:20:50,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 02:20:50,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-16 02:20:50,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:20:50,438 INFO L225 Difference]: With dead ends: 58 [2022-10-16 02:20:50,438 INFO L226 Difference]: Without dead ends: 56 [2022-10-16 02:20:50,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 02:20:50,458 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 34 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:20:50,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 57 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:20:50,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-10-16 02:20:50,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-10-16 02:20:50,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 51 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:20:50,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-10-16 02:20:50,517 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 4 [2022-10-16 02:20:50,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:20:50,518 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-10-16 02:20:50,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:20:50,519 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-10-16 02:20:50,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 02:20:50,519 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:20:50,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 02:20:50,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-16 02:20:50,520 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:20:50,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:20:50,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1849286, now seen corresponding path program 1 times [2022-10-16 02:20:50,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:20:50,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264183913] [2022-10-16 02:20:50,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:20:50,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:20:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:20:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:20:50,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:20:50,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264183913] [2022-10-16 02:20:50,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264183913] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:20:50,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 02:20:50,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 02:20:50,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898093771] [2022-10-16 02:20:50,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:20:50,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 02:20:50,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:20:50,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 02:20:50,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 02:20:50,710 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:20:50,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:20:50,786 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-10-16 02:20:50,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 02:20:50,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-16 02:20:50,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:20:50,788 INFO L225 Difference]: With dead ends: 60 [2022-10-16 02:20:50,788 INFO L226 Difference]: Without dead ends: 60 [2022-10-16 02:20:50,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 02:20:50,790 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 2 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:20:50,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 88 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:20:50,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-10-16 02:20:50,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2022-10-16 02:20:50,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 53 states have internal predecessors, (57), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:20:50,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2022-10-16 02:20:50,803 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 4 [2022-10-16 02:20:50,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:20:50,803 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2022-10-16 02:20:50,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:20:50,804 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2022-10-16 02:20:50,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-16 02:20:50,804 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:20:50,805 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-10-16 02:20:50,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-16 02:20:50,805 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:20:50,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:20:50,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1543018551, now seen corresponding path program 1 times [2022-10-16 02:20:50,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:20:50,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9895692] [2022-10-16 02:20:50,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:20:50,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:20:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:20:51,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:20:51,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:20:51,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9895692] [2022-10-16 02:20:51,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9895692] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:20:51,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12074488] [2022-10-16 02:20:51,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:20:51,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:20:51,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:20:51,066 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:20:51,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-16 02:20:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:20:51,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-16 02:20:51,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:20:51,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 02:20:51,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:20:51,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:20:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:20:51,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12074488] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:20:51,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:20:51,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-10-16 02:20:51,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089430775] [2022-10-16 02:20:51,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:20:51,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-16 02:20:51,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:20:51,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-16 02:20:51,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-10-16 02:20:51,440 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:20:51,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:20:51,651 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2022-10-16 02:20:51,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 02:20:51,652 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-10-16 02:20:51,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:20:51,654 INFO L225 Difference]: With dead ends: 62 [2022-10-16 02:20:51,654 INFO L226 Difference]: Without dead ends: 62 [2022-10-16 02:20:51,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-10-16 02:20:51,657 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 38 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:20:51,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 164 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:20:51,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-10-16 02:20:51,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-10-16 02:20:51,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.22) internal successors, (61), 57 states have internal predecessors, (61), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:20:51,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2022-10-16 02:20:51,668 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 8 [2022-10-16 02:20:51,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:20:51,668 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2022-10-16 02:20:51,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:20:51,669 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2022-10-16 02:20:51,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-16 02:20:51,670 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:20:51,670 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:20:51,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-10-16 02:20:51,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:20:51,885 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:20:51,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:20:51,887 INFO L85 PathProgramCache]: Analyzing trace with hash 802905803, now seen corresponding path program 1 times [2022-10-16 02:20:51,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:20:51,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264612647] [2022-10-16 02:20:51,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:20:51,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:20:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:20:52,131 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-16 02:20:52,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:20:52,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264612647] [2022-10-16 02:20:52,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264612647] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:20:52,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 02:20:52,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 02:20:52,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820058147] [2022-10-16 02:20:52,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:20:52,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 02:20:52,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:20:52,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 02:20:52,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-16 02:20:52,135 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:20:52,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:20:52,222 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-10-16 02:20:52,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 02:20:52,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-10-16 02:20:52,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:20:52,224 INFO L225 Difference]: With dead ends: 60 [2022-10-16 02:20:52,224 INFO L226 Difference]: Without dead ends: 60 [2022-10-16 02:20:52,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-16 02:20:52,226 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 49 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:20:52,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 75 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:20:52,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-10-16 02:20:52,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-10-16 02:20:52,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 50 states have (on average 1.18) internal successors, (59), 55 states have internal predecessors, (59), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:20:52,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2022-10-16 02:20:52,235 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 23 [2022-10-16 02:20:52,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:20:52,236 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2022-10-16 02:20:52,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:20:52,236 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2022-10-16 02:20:52,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-16 02:20:52,237 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:20:52,237 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:20:52,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-16 02:20:52,238 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:20:52,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:20:52,239 INFO L85 PathProgramCache]: Analyzing trace with hash 802905804, now seen corresponding path program 1 times [2022-10-16 02:20:52,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:20:52,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662955240] [2022-10-16 02:20:52,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:20:52,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:20:52,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:20:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:20:52,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:20:52,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662955240] [2022-10-16 02:20:52,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662955240] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:20:52,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555323218] [2022-10-16 02:20:52,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:20:52,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:20:52,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:20:52,370 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:20:52,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-16 02:20:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:20:52,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-16 02:20:52,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:20:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:20:52,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:20:52,583 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:20:52,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555323218] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:20:52,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:20:52,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-10-16 02:20:52,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673269516] [2022-10-16 02:20:52,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:20:52,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-16 02:20:52,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:20:52,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-16 02:20:52,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-10-16 02:20:52,586 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:20:52,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:20:52,647 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2022-10-16 02:20:52,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-16 02:20:52,648 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-10-16 02:20:52,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:20:52,649 INFO L225 Difference]: With dead ends: 84 [2022-10-16 02:20:52,649 INFO L226 Difference]: Without dead ends: 84 [2022-10-16 02:20:52,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-10-16 02:20:52,651 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 30 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 02:20:52,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 196 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 02:20:52,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-10-16 02:20:52,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-10-16 02:20:52,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 74 states have (on average 1.1216216216216217) internal successors, (83), 79 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:20:52,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2022-10-16 02:20:52,661 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 23 [2022-10-16 02:20:52,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:20:52,661 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2022-10-16 02:20:52,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:20:52,662 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2022-10-16 02:20:52,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-16 02:20:52,664 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:20:52,664 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:20:52,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-16 02:20:52,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:20:52,878 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:20:52,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:20:52,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1615740934, now seen corresponding path program 2 times [2022-10-16 02:20:52,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:20:52,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732461515] [2022-10-16 02:20:52,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:20:52,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:20:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:20:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:20:53,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:20:53,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732461515] [2022-10-16 02:20:53,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732461515] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:20:53,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847773942] [2022-10-16 02:20:53,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 02:20:53,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:20:53,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:20:53,217 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:20:53,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-16 02:20:53,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-16 02:20:53,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 02:20:53,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-16 02:20:53,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:20:53,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 02:20:53,632 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-10-16 02:20:53,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 02:20:53,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847773942] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:20:53,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 02:20:53,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 16 [2022-10-16 02:20:53,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274043423] [2022-10-16 02:20:53,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:20:53,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 02:20:53,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:20:53,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 02:20:53,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-10-16 02:20:53,636 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:20:53,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:20:53,749 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2022-10-16 02:20:53,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 02:20:53,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-10-16 02:20:53,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:20:53,751 INFO L225 Difference]: With dead ends: 91 [2022-10-16 02:20:53,751 INFO L226 Difference]: Without dead ends: 91 [2022-10-16 02:20:53,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2022-10-16 02:20:53,753 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 50 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:20:53,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 80 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:20:53,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-10-16 02:20:53,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2022-10-16 02:20:53,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 78 states have (on average 1.1282051282051282) internal successors, (88), 83 states have internal predecessors, (88), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:20:53,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2022-10-16 02:20:53,763 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 47 [2022-10-16 02:20:53,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:20:53,764 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2022-10-16 02:20:53,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:20:53,764 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2022-10-16 02:20:53,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-10-16 02:20:53,766 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:20:53,766 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:20:53,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-16 02:20:53,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:20:53,980 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:20:53,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:20:53,981 INFO L85 PathProgramCache]: Analyzing trace with hash 484682849, now seen corresponding path program 1 times [2022-10-16 02:20:53,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:20:53,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516066682] [2022-10-16 02:20:53,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:20:53,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:20:54,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:20:54,290 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 02:20:54,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:20:54,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516066682] [2022-10-16 02:20:54,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516066682] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:20:54,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365967948] [2022-10-16 02:20:54,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:20:54,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:20:54,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:20:54,293 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:20:54,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-16 02:20:54,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:20:54,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-16 02:20:54,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:20:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 02:20:54,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:20:54,753 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 02:20:54,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365967948] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:20:54,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:20:54,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-10-16 02:20:54,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851047915] [2022-10-16 02:20:54,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:20:54,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-16 02:20:54,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:20:54,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-16 02:20:54,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-10-16 02:20:54,757 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 25 states, 25 states have (on average 3.88) internal successors, (97), 25 states have internal predecessors, (97), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:20:54,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:20:54,871 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2022-10-16 02:20:54,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-10-16 02:20:54,872 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.88) internal successors, (97), 25 states have internal predecessors, (97), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-10-16 02:20:54,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:20:54,874 INFO L225 Difference]: With dead ends: 136 [2022-10-16 02:20:54,874 INFO L226 Difference]: Without dead ends: 136 [2022-10-16 02:20:54,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-10-16 02:20:54,876 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 99 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:20:54,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 255 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:20:54,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-10-16 02:20:54,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-10-16 02:20:54,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 126 states have (on average 1.0793650793650793) internal successors, (136), 131 states have internal predecessors, (136), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:20:54,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 142 transitions. [2022-10-16 02:20:54,887 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 142 transitions. Word has length 52 [2022-10-16 02:20:54,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:20:54,887 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 142 transitions. [2022-10-16 02:20:54,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.88) internal successors, (97), 25 states have internal predecessors, (97), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:20:54,888 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 142 transitions. [2022-10-16 02:20:54,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-10-16 02:20:54,891 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:20:54,892 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:20:54,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-16 02:20:55,105 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 [2022-10-16 02:20:55,106 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:20:55,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:20:55,107 INFO L85 PathProgramCache]: Analyzing trace with hash -156188283, now seen corresponding path program 2 times [2022-10-16 02:20:55,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:20:55,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528220826] [2022-10-16 02:20:55,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:20:55,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:20:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:20:55,925 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 02:20:55,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:20:55,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528220826] [2022-10-16 02:20:55,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528220826] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:20:55,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319841605] [2022-10-16 02:20:55,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 02:20:55,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:20:55,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:20:55,928 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:20:55,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-16 02:20:56,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 02:20:56,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 02:20:56,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 24 conjunts are in the unsatisfiable core [2022-10-16 02:20:56,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:20:56,226 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 02:20:56,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:20:57,184 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 02:20:57,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319841605] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:20:57,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:20:57,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-10-16 02:20:57,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582726056] [2022-10-16 02:20:57,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:20:57,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-10-16 02:20:57,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:20:57,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-10-16 02:20:57,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-10-16 02:20:57,190 INFO L87 Difference]: Start difference. First operand 136 states and 142 transitions. Second operand has 49 states, 49 states have (on average 3.938775510204082) internal successors, (193), 49 states have internal predecessors, (193), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:20:57,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:20:57,452 INFO L93 Difference]: Finished difference Result 232 states and 238 transitions. [2022-10-16 02:20:57,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-10-16 02:20:57,453 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.938775510204082) internal successors, (193), 49 states have internal predecessors, (193), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2022-10-16 02:20:57,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:20:57,455 INFO L225 Difference]: With dead ends: 232 [2022-10-16 02:20:57,456 INFO L226 Difference]: Without dead ends: 232 [2022-10-16 02:20:57,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-10-16 02:20:57,458 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 138 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 02:20:57,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 278 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 02:20:57,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-10-16 02:20:57,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2022-10-16 02:20:57,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 222 states have (on average 1.045045045045045) internal successors, (232), 227 states have internal predecessors, (232), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:20:57,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 238 transitions. [2022-10-16 02:20:57,472 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 238 transitions. Word has length 100 [2022-10-16 02:20:57,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:20:57,473 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 238 transitions. [2022-10-16 02:20:57,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.938775510204082) internal successors, (193), 49 states have internal predecessors, (193), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:20:57,474 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 238 transitions. [2022-10-16 02:20:57,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-10-16 02:20:57,480 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:20:57,480 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:20:57,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-16 02:20:57,693 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 [2022-10-16 02:20:57,694 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:20:57,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:20:57,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1773280307, now seen corresponding path program 3 times [2022-10-16 02:20:57,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:20:57,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81315196] [2022-10-16 02:20:57,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:20:57,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:20:57,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4188 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 02:21:00,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:21:00,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81315196] [2022-10-16 02:21:00,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81315196] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:21:00,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493085543] [2022-10-16 02:21:00,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 02:21:00,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:21:00,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:21:00,637 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:21:00,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-16 02:21:00,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-16 02:21:00,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 02:21:00,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-16 02:21:00,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:21:00,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 02:21:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4188 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2022-10-16 02:21:01,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 02:21:01,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493085543] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:21:01,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 02:21:01,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [49] total 54 [2022-10-16 02:21:01,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725913354] [2022-10-16 02:21:01,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:21:01,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 02:21:01,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:21:01,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 02:21:01,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1673, Unknown=0, NotChecked=0, Total=2862 [2022-10-16 02:21:01,705 INFO L87 Difference]: Start difference. First operand 232 states and 238 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:21:01,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:21:01,932 INFO L93 Difference]: Finished difference Result 233 states and 239 transitions. [2022-10-16 02:21:01,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 02:21:01,933 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2022-10-16 02:21:01,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:21:01,938 INFO L225 Difference]: With dead ends: 233 [2022-10-16 02:21:01,938 INFO L226 Difference]: Without dead ends: 233 [2022-10-16 02:21:01,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1207, Invalid=1985, Unknown=0, NotChecked=0, Total=3192 [2022-10-16 02:21:01,946 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 47 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:21:01,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 126 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:21:01,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-10-16 02:21:01,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 227. [2022-10-16 02:21:01,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 219 states have (on average 1.0319634703196348) internal successors, (226), 222 states have internal predecessors, (226), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:21:01,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 232 transitions. [2022-10-16 02:21:01,980 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 232 transitions. Word has length 196 [2022-10-16 02:21:01,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:21:01,981 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 232 transitions. [2022-10-16 02:21:01,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:21:01,981 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 232 transitions. [2022-10-16 02:21:01,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-10-16 02:21:01,995 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:21:01,996 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:21:02,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-16 02:21:02,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:21:02,210 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:21:02,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:21:02,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1569680254, now seen corresponding path program 1 times [2022-10-16 02:21:02,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:21:02,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073262348] [2022-10-16 02:21:02,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:21:02,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:21:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:02,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-10-16 02:21:02,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:02,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-10-16 02:21:02,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4200 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4188 trivial. 0 not checked. [2022-10-16 02:21:02,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:21:02,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073262348] [2022-10-16 02:21:02,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073262348] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:21:02,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918363022] [2022-10-16 02:21:02,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:21:02,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:21:02,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:21:02,600 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:21:02,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-16 02:21:02,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:02,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 48 conjunts are in the unsatisfiable core [2022-10-16 02:21:02,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:21:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4200 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-10-16 02:21:04,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:21:05,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4200 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-10-16 02:21:05,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918363022] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:21:05,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:21:05,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 49, 49] total 64 [2022-10-16 02:21:05,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592673614] [2022-10-16 02:21:05,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:21:05,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-10-16 02:21:05,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:21:05,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-10-16 02:21:05,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1896, Invalid=2136, Unknown=0, NotChecked=0, Total=4032 [2022-10-16 02:21:05,812 INFO L87 Difference]: Start difference. First operand 227 states and 232 transitions. Second operand has 64 states, 64 states have (on average 4.4375) internal successors, (284), 64 states have internal predecessors, (284), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-16 02:21:06,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:21:06,182 INFO L93 Difference]: Finished difference Result 296 states and 303 transitions. [2022-10-16 02:21:06,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-10-16 02:21:06,183 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 4.4375) internal successors, (284), 64 states have internal predecessors, (284), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 221 [2022-10-16 02:21:06,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:21:06,185 INFO L225 Difference]: With dead ends: 296 [2022-10-16 02:21:06,185 INFO L226 Difference]: Without dead ends: 296 [2022-10-16 02:21:06,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 352 SyntacticMatches, 34 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1896, Invalid=2136, Unknown=0, NotChecked=0, Total=4032 [2022-10-16 02:21:06,189 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 197 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 02:21:06,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 267 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 02:21:06,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-10-16 02:21:06,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 290. [2022-10-16 02:21:06,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 282 states have (on average 1.0283687943262412) internal successors, (290), 285 states have internal predecessors, (290), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:21:06,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 296 transitions. [2022-10-16 02:21:06,199 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 296 transitions. Word has length 221 [2022-10-16 02:21:06,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:21:06,200 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 296 transitions. [2022-10-16 02:21:06,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 4.4375) internal successors, (284), 64 states have internal predecessors, (284), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-16 02:21:06,200 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 296 transitions. [2022-10-16 02:21:06,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-10-16 02:21:06,206 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:21:06,206 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 60, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:21:06,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-16 02:21:06,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:21:06,422 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:21:06,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:21:06,423 INFO L85 PathProgramCache]: Analyzing trace with hash -471704706, now seen corresponding path program 2 times [2022-10-16 02:21:06,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:21:06,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131783193] [2022-10-16 02:21:06,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:21:06,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:21:06,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:06,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2022-10-16 02:21:06,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:06,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2022-10-16 02:21:06,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:06,990 INFO L134 CoverageAnalysis]: Checked inductivity of 7183 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7183 trivial. 0 not checked. [2022-10-16 02:21:06,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:21:06,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131783193] [2022-10-16 02:21:06,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131783193] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:21:06,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 02:21:06,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 02:21:06,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23858867] [2022-10-16 02:21:06,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:21:06,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 02:21:06,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:21:06,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 02:21:06,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-16 02:21:06,995 INFO L87 Difference]: Start difference. First operand 290 states and 296 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 02:21:07,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:21:07,044 INFO L93 Difference]: Finished difference Result 295 states and 301 transitions. [2022-10-16 02:21:07,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 02:21:07,045 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 287 [2022-10-16 02:21:07,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:21:07,048 INFO L225 Difference]: With dead ends: 295 [2022-10-16 02:21:07,048 INFO L226 Difference]: Without dead ends: 295 [2022-10-16 02:21:07,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-16 02:21:07,050 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 35 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 02:21:07,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 74 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 02:21:07,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-10-16 02:21:07,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 293. [2022-10-16 02:21:07,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 285 states have (on average 1.0280701754385966) internal successors, (293), 288 states have internal predecessors, (293), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:21:07,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 299 transitions. [2022-10-16 02:21:07,062 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 299 transitions. Word has length 287 [2022-10-16 02:21:07,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:21:07,064 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 299 transitions. [2022-10-16 02:21:07,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 02:21:07,064 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 299 transitions. [2022-10-16 02:21:07,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2022-10-16 02:21:07,069 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:21:07,070 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 60, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:21:07,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-16 02:21:07,072 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:21:07,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:21:07,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1521581308, now seen corresponding path program 1 times [2022-10-16 02:21:07,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:21:07,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719670525] [2022-10-16 02:21:07,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:21:07,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:21:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:07,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2022-10-16 02:21:07,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:07,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2022-10-16 02:21:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:07,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7185 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 7150 trivial. 0 not checked. [2022-10-16 02:21:07,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:21:07,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719670525] [2022-10-16 02:21:07,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719670525] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:21:07,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748677190] [2022-10-16 02:21:07,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:21:07,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:21:07,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:21:07,689 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:21:07,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-16 02:21:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:07,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-16 02:21:07,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:21:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7185 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 7152 trivial. 0 not checked. [2022-10-16 02:21:07,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:21:08,047 INFO L134 CoverageAnalysis]: Checked inductivity of 7185 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 7150 trivial. 0 not checked. [2022-10-16 02:21:08,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748677190] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:21:08,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:21:08,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-10-16 02:21:08,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978031164] [2022-10-16 02:21:08,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:21:08,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 02:21:08,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:21:08,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 02:21:08,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-10-16 02:21:08,052 INFO L87 Difference]: Start difference. First operand 293 states and 299 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-16 02:21:08,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:21:08,088 INFO L93 Difference]: Finished difference Result 321 states and 331 transitions. [2022-10-16 02:21:08,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 02:21:08,089 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 292 [2022-10-16 02:21:08,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:21:08,093 INFO L225 Difference]: With dead ends: 321 [2022-10-16 02:21:08,093 INFO L226 Difference]: Without dead ends: 321 [2022-10-16 02:21:08,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 585 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-10-16 02:21:08,094 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 60 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 02:21:08,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 146 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 02:21:08,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-10-16 02:21:08,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 321. [2022-10-16 02:21:08,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 313 states have (on average 1.038338658146965) internal successors, (325), 316 states have internal predecessors, (325), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:21:08,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 331 transitions. [2022-10-16 02:21:08,108 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 331 transitions. Word has length 292 [2022-10-16 02:21:08,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:21:08,109 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 331 transitions. [2022-10-16 02:21:08,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-16 02:21:08,110 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 331 transitions. [2022-10-16 02:21:08,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2022-10-16 02:21:08,119 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:21:08,119 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 60, 12, 12, 12, 12, 12, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:21:08,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-16 02:21:08,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-10-16 02:21:08,334 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:21:08,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:21:08,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1035879676, now seen corresponding path program 2 times [2022-10-16 02:21:08,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:21:08,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760210430] [2022-10-16 02:21:08,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:21:08,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:21:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:09,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2022-10-16 02:21:09,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:09,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2022-10-16 02:21:09,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7501 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7499 trivial. 0 not checked. [2022-10-16 02:21:09,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:21:09,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760210430] [2022-10-16 02:21:09,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760210430] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:21:09,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107256312] [2022-10-16 02:21:09,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 02:21:09,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:21:09,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:21:09,457 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:21:09,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-16 02:21:09,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 02:21:09,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 02:21:09,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 1154 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-16 02:21:09,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:21:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7501 backedges. 194 proven. 81 refuted. 0 times theorem prover too weak. 7226 trivial. 0 not checked. [2022-10-16 02:21:09,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:21:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7501 backedges. 0 proven. 277 refuted. 0 times theorem prover too weak. 7224 trivial. 0 not checked. [2022-10-16 02:21:10,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107256312] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:21:10,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:21:10,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 20 [2022-10-16 02:21:10,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375863235] [2022-10-16 02:21:10,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:21:10,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-10-16 02:21:10,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:21:10,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-10-16 02:21:10,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2022-10-16 02:21:10,031 INFO L87 Difference]: Start difference. First operand 321 states and 331 transitions. Second operand has 20 states, 20 states have (on average 6.4) internal successors, (128), 20 states have internal predecessors, (128), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-10-16 02:21:10,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:21:10,198 INFO L93 Difference]: Finished difference Result 378 states and 396 transitions. [2022-10-16 02:21:10,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-10-16 02:21:10,198 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.4) internal successors, (128), 20 states have internal predecessors, (128), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 332 [2022-10-16 02:21:10,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:21:10,203 INFO L225 Difference]: With dead ends: 378 [2022-10-16 02:21:10,203 INFO L226 Difference]: Without dead ends: 378 [2022-10-16 02:21:10,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 653 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2022-10-16 02:21:10,205 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 210 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:21:10,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 188 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:21:10,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-10-16 02:21:10,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2022-10-16 02:21:10,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 372 states have (on average 1.0483870967741935) internal successors, (390), 373 states have internal predecessors, (390), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:21:10,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 396 transitions. [2022-10-16 02:21:10,218 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 396 transitions. Word has length 332 [2022-10-16 02:21:10,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:21:10,219 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 396 transitions. [2022-10-16 02:21:10,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.4) internal successors, (128), 20 states have internal predecessors, (128), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-10-16 02:21:10,219 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 396 transitions. [2022-10-16 02:21:10,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2022-10-16 02:21:10,230 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:21:10,230 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 60, 42, 42, 42, 42, 42, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:21:10,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-16 02:21:10,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-16 02:21:10,444 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:21:10,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:21:10,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1373900733, now seen corresponding path program 1 times [2022-10-16 02:21:10,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:21:10,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273092150] [2022-10-16 02:21:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:21:10,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:21:10,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:11,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2022-10-16 02:21:11,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:12,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 326 [2022-10-16 02:21:12,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:12,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 417 [2022-10-16 02:21:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 11593 backedges. 0 proven. 2493 refuted. 0 times theorem prover too weak. 9100 trivial. 0 not checked. [2022-10-16 02:21:12,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:21:12,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273092150] [2022-10-16 02:21:12,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273092150] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:21:12,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715449285] [2022-10-16 02:21:12,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:21:12,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:21:12,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:21:12,174 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:21:12,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-16 02:21:12,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:12,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 1625 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-16 02:21:12,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:21:12,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11593 backedges. 2020 proven. 469 refuted. 0 times theorem prover too weak. 9104 trivial. 0 not checked. [2022-10-16 02:21:12,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:21:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11593 backedges. 0 proven. 2493 refuted. 0 times theorem prover too weak. 9100 trivial. 0 not checked. [2022-10-16 02:21:13,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715449285] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:21:13,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:21:13,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2022-10-16 02:21:13,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147361612] [2022-10-16 02:21:13,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:21:13,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-10-16 02:21:13,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:21:13,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-10-16 02:21:13,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2022-10-16 02:21:13,082 INFO L87 Difference]: Start difference. First operand 378 states and 396 transitions. Second operand has 32 states, 32 states have (on average 5.90625) internal successors, (189), 32 states have internal predecessors, (189), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-16 02:21:13,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:21:13,303 INFO L93 Difference]: Finished difference Result 490 states and 524 transitions. [2022-10-16 02:21:13,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-10-16 02:21:13,304 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.90625) internal successors, (189), 32 states have internal predecessors, (189), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 496 [2022-10-16 02:21:13,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:21:13,307 INFO L225 Difference]: With dead ends: 490 [2022-10-16 02:21:13,307 INFO L226 Difference]: Without dead ends: 490 [2022-10-16 02:21:13,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1013 GetRequests, 983 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2022-10-16 02:21:13,309 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 474 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:21:13,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 236 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:21:13,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-10-16 02:21:13,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2022-10-16 02:21:13,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 484 states have (on average 1.0702479338842976) internal successors, (518), 485 states have internal predecessors, (518), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:21:13,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 524 transitions. [2022-10-16 02:21:13,325 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 524 transitions. Word has length 496 [2022-10-16 02:21:13,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:21:13,326 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 524 transitions. [2022-10-16 02:21:13,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.90625) internal successors, (189), 32 states have internal predecessors, (189), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-16 02:21:13,326 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 524 transitions. [2022-10-16 02:21:13,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 737 [2022-10-16 02:21:13,348 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:21:13,349 INFO L195 NwaCegarLoop]: trace histogram [90, 90, 90, 90, 90, 60, 60, 60, 60, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:21:13,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-16 02:21:13,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-10-16 02:21:13,563 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:21:13,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:21:13,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1337939645, now seen corresponding path program 2 times [2022-10-16 02:21:13,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:21:13,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791590101] [2022-10-16 02:21:13,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:21:13,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:21:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:16,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2022-10-16 02:21:16,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:17,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 406 [2022-10-16 02:21:17,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:17,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 577 [2022-10-16 02:21:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:17,502 INFO L134 CoverageAnalysis]: Checked inductivity of 27457 backedges. 0 proven. 11333 refuted. 0 times theorem prover too weak. 16124 trivial. 0 not checked. [2022-10-16 02:21:17,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:21:17,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791590101] [2022-10-16 02:21:17,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791590101] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:21:17,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125063650] [2022-10-16 02:21:17,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 02:21:17,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:21:17,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:21:17,505 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:21:17,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-16 02:21:18,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 02:21:18,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 02:21:18,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 2297 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-16 02:21:18,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:21:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 27457 backedges. 9124 proven. 2205 refuted. 0 times theorem prover too weak. 16128 trivial. 0 not checked. [2022-10-16 02:21:18,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:21:19,736 INFO L134 CoverageAnalysis]: Checked inductivity of 27457 backedges. 0 proven. 11333 refuted. 0 times theorem prover too weak. 16124 trivial. 0 not checked. [2022-10-16 02:21:19,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125063650] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:21:19,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:21:19,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 62 [2022-10-16 02:21:19,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090256121] [2022-10-16 02:21:19,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:21:19,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-10-16 02:21:19,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:21:19,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-10-16 02:21:19,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2022-10-16 02:21:19,743 INFO L87 Difference]: Start difference. First operand 490 states and 524 transitions. Second operand has 62 states, 62 states have (on average 5.548387096774194) internal successors, (344), 62 states have internal predecessors, (344), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-16 02:21:20,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:21:20,478 INFO L93 Difference]: Finished difference Result 700 states and 764 transitions. [2022-10-16 02:21:20,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-10-16 02:21:20,479 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 5.548387096774194) internal successors, (344), 62 states have internal predecessors, (344), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 736 [2022-10-16 02:21:20,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:21:20,483 INFO L225 Difference]: With dead ends: 700 [2022-10-16 02:21:20,484 INFO L226 Difference]: Without dead ends: 700 [2022-10-16 02:21:20,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1509 GetRequests, 1447 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2022-10-16 02:21:20,487 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 771 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 02:21:20,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [771 Valid, 508 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-16 02:21:20,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-10-16 02:21:20,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 700. [2022-10-16 02:21:20,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 694 states have (on average 1.0922190201729107) internal successors, (758), 695 states have internal predecessors, (758), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:21:20,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 764 transitions. [2022-10-16 02:21:20,506 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 764 transitions. Word has length 736 [2022-10-16 02:21:20,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:21:20,507 INFO L495 AbstractCegarLoop]: Abstraction has 700 states and 764 transitions. [2022-10-16 02:21:20,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 5.548387096774194) internal successors, (344), 62 states have internal predecessors, (344), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-16 02:21:20,507 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 764 transitions. [2022-10-16 02:21:20,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1187 [2022-10-16 02:21:20,566 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:21:20,567 INFO L195 NwaCegarLoop]: trace histogram [180, 180, 180, 180, 180, 60, 60, 60, 60, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:21:20,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-10-16 02:21:20,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-10-16 02:21:20,781 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:21:20,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:21:20,783 INFO L85 PathProgramCache]: Analyzing trace with hash 806791133, now seen corresponding path program 3 times [2022-10-16 02:21:20,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:21:20,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607931856] [2022-10-16 02:21:20,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:21:20,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:21:21,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:22,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2022-10-16 02:21:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:22,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 556 [2022-10-16 02:21:22,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:22,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 877 [2022-10-16 02:21:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 88252 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 88245 trivial. 0 not checked. [2022-10-16 02:21:22,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:21:22,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607931856] [2022-10-16 02:21:22,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607931856] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:21:22,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106096039] [2022-10-16 02:21:22,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 02:21:22,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:21:22,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:21:22,388 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:21:22,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-16 02:21:22,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-10-16 02:21:22,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 02:21:22,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-16 02:21:22,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:21:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 88252 backedges. 36250 proven. 7 refuted. 0 times theorem prover too weak. 51995 trivial. 0 not checked. [2022-10-16 02:21:22,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:21:22,909 INFO L134 CoverageAnalysis]: Checked inductivity of 88252 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 88245 trivial. 0 not checked. [2022-10-16 02:21:22,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106096039] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:21:22,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:21:22,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-10-16 02:21:22,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200070825] [2022-10-16 02:21:22,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:21:22,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-16 02:21:22,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:21:22,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-16 02:21:22,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-16 02:21:22,914 INFO L87 Difference]: Start difference. First operand 700 states and 764 transitions. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 02:21:22,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:21:22,958 INFO L93 Difference]: Finished difference Result 720 states and 784 transitions. [2022-10-16 02:21:22,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 02:21:22,959 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 1186 [2022-10-16 02:21:22,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:21:22,965 INFO L225 Difference]: With dead ends: 720 [2022-10-16 02:21:22,965 INFO L226 Difference]: Without dead ends: 720 [2022-10-16 02:21:22,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2381 GetRequests, 2374 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-16 02:21:22,966 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 36 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 02:21:22,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 130 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 02:21:22,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-10-16 02:21:22,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 720. [2022-10-16 02:21:22,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 714 states have (on average 1.0896358543417366) internal successors, (778), 715 states have internal predecessors, (778), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:21:22,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 784 transitions. [2022-10-16 02:21:22,988 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 784 transitions. Word has length 1186 [2022-10-16 02:21:22,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:21:22,990 INFO L495 AbstractCegarLoop]: Abstraction has 720 states and 784 transitions. [2022-10-16 02:21:22,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 02:21:22,991 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 784 transitions. [2022-10-16 02:21:23,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1207 [2022-10-16 02:21:23,008 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:21:23,008 INFO L195 NwaCegarLoop]: trace histogram [180, 180, 180, 180, 180, 60, 60, 60, 60, 6, 6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:21:23,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-10-16 02:21:23,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-10-16 02:21:23,222 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:21:23,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:21:23,224 INFO L85 PathProgramCache]: Analyzing trace with hash 722856541, now seen corresponding path program 4 times [2022-10-16 02:21:23,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:21:23,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790915913] [2022-10-16 02:21:23,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:21:23,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:21:23,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:24,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2022-10-16 02:21:24,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:24,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 556 [2022-10-16 02:21:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:25,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 897 [2022-10-16 02:21:25,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:21:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 88326 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 88245 trivial. 0 not checked. [2022-10-16 02:21:25,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:21:25,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790915913] [2022-10-16 02:21:25,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790915913] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:21:25,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633629004] [2022-10-16 02:21:25,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-16 02:21:25,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:21:25,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:21:25,176 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:21:25,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-10-16 02:22:18,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-16 02:22:18,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 02:22:18,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 3629 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-16 02:22:18,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:22:18,528 INFO L134 CoverageAnalysis]: Checked inductivity of 88326 backedges. 36250 proven. 81 refuted. 0 times theorem prover too weak. 51995 trivial. 0 not checked. [2022-10-16 02:22:18,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:22:18,673 INFO L134 CoverageAnalysis]: Checked inductivity of 88326 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 88245 trivial. 0 not checked. [2022-10-16 02:22:18,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633629004] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:22:18,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:22:18,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-10-16 02:22:18,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236241931] [2022-10-16 02:22:18,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:22:18,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-16 02:22:18,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:22:18,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-16 02:22:18,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-16 02:22:18,678 INFO L87 Difference]: Start difference. First operand 720 states and 784 transitions. Second operand has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 02:22:18,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:22:18,768 INFO L93 Difference]: Finished difference Result 760 states and 824 transitions. [2022-10-16 02:22:18,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-16 02:22:18,769 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 1206 [2022-10-16 02:22:18,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:22:18,775 INFO L225 Difference]: With dead ends: 760 [2022-10-16 02:22:18,775 INFO L226 Difference]: Without dead ends: 760 [2022-10-16 02:22:18,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2425 GetRequests, 2410 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-16 02:22:18,776 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 84 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:22:18,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 297 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:22:18,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-10-16 02:22:18,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 760. [2022-10-16 02:22:18,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 754 states have (on average 1.0848806366047745) internal successors, (818), 755 states have internal predecessors, (818), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:22:18,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 824 transitions. [2022-10-16 02:22:18,799 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 824 transitions. Word has length 1206 [2022-10-16 02:22:18,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:22:18,801 INFO L495 AbstractCegarLoop]: Abstraction has 760 states and 824 transitions. [2022-10-16 02:22:18,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 02:22:18,802 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 824 transitions. [2022-10-16 02:22:18,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1247 [2022-10-16 02:22:18,821 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:22:18,821 INFO L195 NwaCegarLoop]: trace histogram [180, 180, 180, 180, 180, 60, 60, 60, 60, 14, 14, 14, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:22:18,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-10-16 02:22:19,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-10-16 02:22:19,036 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:22:19,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:22:19,037 INFO L85 PathProgramCache]: Analyzing trace with hash -679104675, now seen corresponding path program 5 times [2022-10-16 02:22:19,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:22:19,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696979629] [2022-10-16 02:22:19,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:22:19,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:22:19,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:22:21,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2022-10-16 02:22:21,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:22:21,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 556 [2022-10-16 02:22:21,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:22:21,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 937 [2022-10-16 02:22:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:22:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 88714 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 88245 trivial. 0 not checked. [2022-10-16 02:22:21,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:22:21,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696979629] [2022-10-16 02:22:21,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696979629] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:22:21,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478208480] [2022-10-16 02:22:21,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-16 02:22:21,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:22:21,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:22:21,719 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:22:21,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process