/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/sep20-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 17:15:39,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 17:15:39,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 17:15:39,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 17:15:39,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 17:15:39,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 17:15:39,714 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 17:15:39,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 17:15:39,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 17:15:39,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 17:15:39,746 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 17:15:39,749 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 17:15:39,750 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 17:15:39,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 17:15:39,755 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 17:15:39,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 17:15:39,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 17:15:39,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 17:15:39,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 17:15:39,776 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 17:15:39,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 17:15:39,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 17:15:39,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 17:15:39,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 17:15:39,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-15 17:15:39,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 17:15:39,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 17:15:39,805 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 17:15:39,806 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-15 17:15:39,858 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 17:15:39,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 17:15:39,859 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 17:15:39,860 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 17:15:39,861 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 17:15:39,861 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 17:15:39,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 17:15:39,864 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 17:15:39,864 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 17:15:39,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 17:15:39,866 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 17:15:39,866 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 17:15:39,866 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 17:15:39,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 17:15:39,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 17:15:39,867 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 17:15:39,867 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 17:15:39,867 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 17:15:39,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 17:15:39,868 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 17:15:39,868 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 17:15:39,868 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 17:15:39,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 17:15:39,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 17:15:39,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 17:15:39,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:15:39,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 17:15:39,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 17:15:39,870 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 17:15:39,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 17:15:39,870 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 17:15:40,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 17:15:40,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 17:15:40,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 17:15:40,368 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 17:15:40,369 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 17:15:40,371 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep20-1.i [2022-10-15 17:15:40,460 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da043bab9/6069634abfe74c20879ae713e31115d0/FLAG7577c6af4 [2022-10-15 17:15:41,181 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 17:15:41,182 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep20-1.i [2022-10-15 17:15:41,191 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da043bab9/6069634abfe74c20879ae713e31115d0/FLAG7577c6af4 [2022-10-15 17:15:41,519 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da043bab9/6069634abfe74c20879ae713e31115d0 [2022-10-15 17:15:41,524 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 17:15:41,530 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 17:15:41,535 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 17:15:41,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 17:15:41,539 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 17:15:41,540 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:15:41" (1/1) ... [2022-10-15 17:15:41,542 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d495058 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:15:41, skipping insertion in model container [2022-10-15 17:15:41,542 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:15:41" (1/1) ... [2022-10-15 17:15:41,551 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 17:15:41,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 17:15:41,757 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/sep20-1.i[1293,1306] [2022-10-15 17:15:41,761 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:15:41,771 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 17:15:41,798 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/sep20-1.i[1293,1306] [2022-10-15 17:15:41,799 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:15:41,823 INFO L208 MainTranslator]: Completed translation [2022-10-15 17:15:41,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:15:41 WrapperNode [2022-10-15 17:15:41,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 17:15:41,825 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 17:15:41,825 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 17:15:41,825 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 17:15:41,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:15:41" (1/1) ... [2022-10-15 17:15:41,844 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:15:41" (1/1) ... [2022-10-15 17:15:41,870 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-10-15 17:15:41,871 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 17:15:41,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 17:15:41,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 17:15:41,872 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 17:15:41,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:15:41" (1/1) ... [2022-10-15 17:15:41,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:15:41" (1/1) ... [2022-10-15 17:15:41,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:15:41" (1/1) ... [2022-10-15 17:15:41,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:15:41" (1/1) ... [2022-10-15 17:15:41,895 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:15:41" (1/1) ... [2022-10-15 17:15:41,900 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:15:41" (1/1) ... [2022-10-15 17:15:41,902 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:15:41" (1/1) ... [2022-10-15 17:15:41,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:15:41" (1/1) ... [2022-10-15 17:15:41,906 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 17:15:41,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 17:15:41,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 17:15:41,908 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 17:15:41,909 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:15:41" (1/1) ... [2022-10-15 17:15:41,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:15:41,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:15:41,949 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-15 17:15:41,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-15 17:15:42,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 17:15:42,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 17:15:42,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 17:15:42,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 17:15:42,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 17:15:42,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 17:15:42,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 17:15:42,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 17:15:42,007 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2022-10-15 17:15:42,007 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2022-10-15 17:15:42,091 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 17:15:42,093 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 17:15:42,480 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 17:15:42,489 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 17:15:42,489 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-15 17:15:42,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:15:42 BoogieIcfgContainer [2022-10-15 17:15:42,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 17:15:42,495 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 17:15:42,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 17:15:42,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 17:15:42,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 05:15:41" (1/3) ... [2022-10-15 17:15:42,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@646d1c66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:15:42, skipping insertion in model container [2022-10-15 17:15:42,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:15:41" (2/3) ... [2022-10-15 17:15:42,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@646d1c66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:15:42, skipping insertion in model container [2022-10-15 17:15:42,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:15:42" (3/3) ... [2022-10-15 17:15:42,503 INFO L112 eAbstractionObserver]: Analyzing ICFG sep20-1.i [2022-10-15 17:15:42,532 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 17:15:42,532 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-10-15 17:15:42,599 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 17:15:42,610 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;@6999574e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 17:15:42,611 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2022-10-15 17:15:42,617 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 57 states have internal predecessors, (65), 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) [2022-10-15 17:15:42,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:15:42,627 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:15:42,628 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:15:42,629 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:15:42,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:15:42,637 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-10-15 17:15:42,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:15:42,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985738156] [2022-10-15 17:15:42,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:42,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:15:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:15:42,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:15:42,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985738156] [2022-10-15 17:15:42,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985738156] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:15:42,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:15:42,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:15:43,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122379491] [2022-10-15 17:15:43,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:15:43,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:15:43,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:15:43,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:15:43,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:15:43,073 INFO L87 Difference]: Start difference. First operand has 62 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 57 states have internal predecessors, (65), 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) [2022-10-15 17:15:43,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:15:43,253 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2022-10-15 17:15:43,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:15:43,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 17:15:43,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:15:43,276 INFO L225 Difference]: With dead ends: 53 [2022-10-15 17:15:43,277 INFO L226 Difference]: Without dead ends: 51 [2022-10-15 17:15:43,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:15:43,286 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 34 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:15:43,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 49 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:15:43,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-10-15 17:15:43,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-10-15 17:15:43,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 46 states have internal predecessors, (50), 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) [2022-10-15 17:15:43,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2022-10-15 17:15:43,355 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 4 [2022-10-15 17:15:43,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:15:43,356 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2022-10-15 17:15:43,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:15:43,358 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2022-10-15 17:15:43,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:15:43,358 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:15:43,359 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:15:43,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 17:15:43,361 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:15:43,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:15:43,362 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-10-15 17:15:43,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:15:43,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384932114] [2022-10-15 17:15:43,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:43,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:15:43,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:15:43,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:15:43,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384932114] [2022-10-15 17:15:43,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384932114] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:15:43,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:15:43,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:15:43,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230786554] [2022-10-15 17:15:43,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:15:43,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:15:43,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:15:43,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:15:43,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:15:43,658 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:15:43,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:15:43,726 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2022-10-15 17:15:43,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:15:43,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 17:15:43,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:15:43,729 INFO L225 Difference]: With dead ends: 55 [2022-10-15 17:15:43,729 INFO L226 Difference]: Without dead ends: 55 [2022-10-15 17:15:43,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:15:43,732 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 2 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:15:43,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 80 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:15:43,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-10-15 17:15:43,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2022-10-15 17:15:43,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 48 states have internal predecessors, (52), 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) [2022-10-15 17:15:43,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2022-10-15 17:15:43,742 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 4 [2022-10-15 17:15:43,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:15:43,743 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2022-10-15 17:15:43,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:15:43,743 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2022-10-15 17:15:43,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-15 17:15:43,744 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:15:43,744 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-10-15 17:15:43,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 17:15:43,745 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:15:43,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:15:43,746 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2022-10-15 17:15:43,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:15:43,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169230540] [2022-10-15 17:15:43,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:43,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:15:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:15:43,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:15:43,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169230540] [2022-10-15 17:15:43,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169230540] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:15:43,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424844426] [2022-10-15 17:15:43,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:43,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:15:43,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:15:43,975 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:15:43,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-15 17:15:44,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:44,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-15 17:15:44,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:15:44,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 17:15:44,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:15:44,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:15:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:15:44,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424844426] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:15:44,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:15:44,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-10-15 17:15:44,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404631330] [2022-10-15 17:15:44,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:15:44,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 17:15:44,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:15:44,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 17:15:44,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-10-15 17:15:44,512 INFO L87 Difference]: Start difference. First operand 53 states and 58 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) [2022-10-15 17:15:44,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:15:44,775 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2022-10-15 17:15:44,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 17:15:44,776 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 [2022-10-15 17:15:44,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:15:44,780 INFO L225 Difference]: With dead ends: 57 [2022-10-15 17:15:44,781 INFO L226 Difference]: Without dead ends: 57 [2022-10-15 17:15:44,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-10-15 17:15:44,789 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 50 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:15:44,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 96 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:15:44,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-10-15 17:15:44,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-10-15 17:15:44,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 52 states have internal predecessors, (56), 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) [2022-10-15 17:15:44,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2022-10-15 17:15:44,815 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 8 [2022-10-15 17:15:44,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:15:44,816 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2022-10-15 17:15:44,816 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) [2022-10-15 17:15:44,816 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2022-10-15 17:15:44,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-15 17:15:44,818 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:15:44,818 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:15:44,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-15 17:15:45,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:15:45,034 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting sepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:15:45,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:15:45,035 INFO L85 PathProgramCache]: Analyzing trace with hash 870736771, now seen corresponding path program 1 times [2022-10-15 17:15:45,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:15:45,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761930340] [2022-10-15 17:15:45,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:45,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:15:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:45,284 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 17:15:45,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:15:45,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761930340] [2022-10-15 17:15:45,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761930340] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:15:45,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:15:45,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 17:15:45,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799871175] [2022-10-15 17:15:45,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:15:45,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 17:15:45,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:15:45,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 17:15:45,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-15 17:15:45,288 INFO L87 Difference]: Start difference. First operand 57 states and 62 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) [2022-10-15 17:15:45,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:15:45,359 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-10-15 17:15:45,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 17:15:45,359 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 [2022-10-15 17:15:45,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:15:45,361 INFO L225 Difference]: With dead ends: 56 [2022-10-15 17:15:45,361 INFO L226 Difference]: Without dead ends: 56 [2022-10-15 17:15:45,361 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 [2022-10-15 17:15:45,362 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 41 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:15:45,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 71 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:15:45,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-10-15 17:15:45,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-10-15 17:15:45,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.1702127659574468) 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) [2022-10-15 17:15:45,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-10-15 17:15:45,373 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 23 [2022-10-15 17:15:45,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:15:45,374 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-10-15 17:15:45,374 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) [2022-10-15 17:15:45,374 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-10-15 17:15:45,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-15 17:15:45,375 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:15:45,375 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:15:45,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 17:15:45,376 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting sepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:15:45,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:15:45,377 INFO L85 PathProgramCache]: Analyzing trace with hash 870736772, now seen corresponding path program 1 times [2022-10-15 17:15:45,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:15:45,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950915963] [2022-10-15 17:15:45,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:45,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:15:45,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:45,486 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:15:45,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:15:45,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950915963] [2022-10-15 17:15:45,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950915963] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:15:45,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289394380] [2022-10-15 17:15:45,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:45,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:15:45,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:15:45,489 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:15:45,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-15 17:15:45,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:45,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-15 17:15:45,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:15:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:15:45,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:15:45,687 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:15:45,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289394380] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:15:45,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:15:45,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-10-15 17:15:45,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962033973] [2022-10-15 17:15:45,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:15:45,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-15 17:15:45,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:15:45,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-15 17:15:45,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-10-15 17:15:45,691 INFO L87 Difference]: Start difference. First operand 56 states and 61 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) [2022-10-15 17:15:45,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:15:45,756 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2022-10-15 17:15:45,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-15 17:15:45,757 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 [2022-10-15 17:15:45,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:15:45,758 INFO L225 Difference]: With dead ends: 80 [2022-10-15 17:15:45,758 INFO L226 Difference]: Without dead ends: 80 [2022-10-15 17:15:45,759 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 [2022-10-15 17:15:45,760 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 30 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:15:45,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 265 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 17:15:45,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-10-15 17:15:45,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-10-15 17:15:45,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 75 states have internal predecessors, (79), 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) [2022-10-15 17:15:45,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2022-10-15 17:15:45,769 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 23 [2022-10-15 17:15:45,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:15:45,769 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2022-10-15 17:15:45,770 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) [2022-10-15 17:15:45,770 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2022-10-15 17:15:45,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-15 17:15:45,772 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:15:45,772 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:15:45,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-15 17:15:45,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:15:45,987 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting sepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:15:45,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:15:45,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1710469554, now seen corresponding path program 2 times [2022-10-15 17:15:45,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:15:45,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008305463] [2022-10-15 17:15:45,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:45,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:15:46,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:46,261 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:15:46,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:15:46,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008305463] [2022-10-15 17:15:46,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008305463] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:15:46,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378850747] [2022-10-15 17:15:46,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 17:15:46,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:15:46,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:15:46,265 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:15:46,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-15 17:15:46,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 17:15:46,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:15:46,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-15 17:15:46,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:15:46,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 17:15:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-10-15 17:15:46,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 17:15:46,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378850747] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:15:46,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 17:15:46,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 16 [2022-10-15 17:15:46,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082751969] [2022-10-15 17:15:46,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:15:46,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 17:15:46,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:15:46,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 17:15:46,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-10-15 17:15:46,646 INFO L87 Difference]: Start difference. First operand 80 states and 85 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) [2022-10-15 17:15:46,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:15:46,747 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2022-10-15 17:15:46,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 17:15:46,748 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 [2022-10-15 17:15:46,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:15:46,749 INFO L225 Difference]: With dead ends: 84 [2022-10-15 17:15:46,749 INFO L226 Difference]: Without dead ends: 84 [2022-10-15 17:15:46,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2022-10-15 17:15:46,751 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 40 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:15:46,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 74 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:15:46,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-10-15 17:15:46,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2022-10-15 17:15:46,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 77 states have internal predecessors, (81), 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) [2022-10-15 17:15:46,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2022-10-15 17:15:46,759 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 47 [2022-10-15 17:15:46,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:15:46,760 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2022-10-15 17:15:46,760 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) [2022-10-15 17:15:46,760 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2022-10-15 17:15:46,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-10-15 17:15:46,762 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:15:46,762 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:15:46,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-15 17:15:46,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:15:46,977 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting sepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:15:46,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:15:46,978 INFO L85 PathProgramCache]: Analyzing trace with hash -57640907, now seen corresponding path program 1 times [2022-10-15 17:15:46,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:15:46,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100926260] [2022-10-15 17:15:46,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:46,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:15:47,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:47,272 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 17:15:47,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:15:47,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100926260] [2022-10-15 17:15:47,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100926260] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:15:47,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791307344] [2022-10-15 17:15:47,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:47,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:15:47,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:15:47,274 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:15:47,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-15 17:15:47,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:47,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-15 17:15:47,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:15:47,440 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 17:15:47,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:15:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 17:15:47,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791307344] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:15:47,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:15:47,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2022-10-15 17:15:47,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870498523] [2022-10-15 17:15:47,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:15:47,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-10-15 17:15:47,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:15:47,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-10-15 17:15:47,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-10-15 17:15:47,675 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 23 states, 23 states have (on average 4.0) internal successors, (92), 23 states have internal predecessors, (92), 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) [2022-10-15 17:15:47,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:15:47,772 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2022-10-15 17:15:47,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-10-15 17:15:47,773 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.0) internal successors, (92), 23 states have internal predecessors, (92), 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 51 [2022-10-15 17:15:47,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:15:47,774 INFO L225 Difference]: With dead ends: 122 [2022-10-15 17:15:47,775 INFO L226 Difference]: Without dead ends: 122 [2022-10-15 17:15:47,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-10-15 17:15:47,776 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 60 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:15:47,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 191 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:15:47,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-10-15 17:15:47,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-10-15 17:15:47,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 113 states have (on average 1.0707964601769913) internal successors, (121), 117 states have internal predecessors, (121), 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) [2022-10-15 17:15:47,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 127 transitions. [2022-10-15 17:15:47,786 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 127 transitions. Word has length 51 [2022-10-15 17:15:47,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:15:47,787 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 127 transitions. [2022-10-15 17:15:47,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.0) internal successors, (92), 23 states have internal predecessors, (92), 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) [2022-10-15 17:15:47,788 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 127 transitions. [2022-10-15 17:15:47,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-10-15 17:15:47,791 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:15:47,791 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:15:47,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-15 17:15:48,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:15:48,006 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting sepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:15:48,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:15:48,007 INFO L85 PathProgramCache]: Analyzing trace with hash 907126487, now seen corresponding path program 2 times [2022-10-15 17:15:48,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:15:48,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042113693] [2022-10-15 17:15:48,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:48,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:15:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2022-10-15 17:15:48,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:15:48,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042113693] [2022-10-15 17:15:48,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042113693] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:15:48,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342452963] [2022-10-15 17:15:48,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 17:15:48,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:15:48,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:15:48,557 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:15:48,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-15 17:15:48,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 17:15:48,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:15:48,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-15 17:15:48,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:15:48,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 17:15:49,225 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2022-10-15 17:15:49,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 17:15:49,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342452963] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:15:49,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 17:15:49,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 8 [2022-10-15 17:15:49,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618743129] [2022-10-15 17:15:49,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:15:49,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-15 17:15:49,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:15:49,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-15 17:15:49,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-10-15 17:15:49,228 INFO L87 Difference]: Start difference. First operand 122 states and 127 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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) [2022-10-15 17:15:49,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:15:49,353 INFO L93 Difference]: Finished difference Result 123 states and 129 transitions. [2022-10-15 17:15:49,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 17:15:49,353 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 91 [2022-10-15 17:15:49,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:15:49,357 INFO L225 Difference]: With dead ends: 123 [2022-10-15 17:15:49,357 INFO L226 Difference]: Without dead ends: 123 [2022-10-15 17:15:49,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-10-15 17:15:49,359 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 42 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:15:49,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 96 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:15:49,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-10-15 17:15:49,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2022-10-15 17:15:49,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 112 states have (on average 1.0625) internal successors, (119), 115 states have internal predecessors, (119), 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) [2022-10-15 17:15:49,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2022-10-15 17:15:49,387 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 91 [2022-10-15 17:15:49,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:15:49,387 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2022-10-15 17:15:49,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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) [2022-10-15 17:15:49,388 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2022-10-15 17:15:49,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-10-15 17:15:49,393 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:15:49,396 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 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] [2022-10-15 17:15:49,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-15 17:15:49,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:15:49,598 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:15:49,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:15:49,599 INFO L85 PathProgramCache]: Analyzing trace with hash 915503160, now seen corresponding path program 1 times [2022-10-15 17:15:49,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:15:49,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024754824] [2022-10-15 17:15:49,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:49,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:15:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:49,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-10-15 17:15:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:49,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-10-15 17:15:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:49,897 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2022-10-15 17:15:49,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:15:49,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024754824] [2022-10-15 17:15:49,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024754824] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:15:49,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76871466] [2022-10-15 17:15:49,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:49,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:15:49,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:15:49,903 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:15:49,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-15 17:15:50,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:50,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-15 17:15:50,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:15:50,097 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-10-15 17:15:50,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:15:50,135 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2022-10-15 17:15:50,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76871466] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:15:50,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:15:50,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-10-15 17:15:50,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17977884] [2022-10-15 17:15:50,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:15:50,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 17:15:50,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:15:50,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 17:15:50,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-10-15 17:15:50,138 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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) [2022-10-15 17:15:50,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:15:50,161 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2022-10-15 17:15:50,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 17:15:50,162 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 115 [2022-10-15 17:15:50,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:15:50,163 INFO L225 Difference]: With dead ends: 132 [2022-10-15 17:15:50,164 INFO L226 Difference]: Without dead ends: 132 [2022-10-15 17:15:50,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-10-15 17:15:50,165 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 18 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:15:50,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 130 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 17:15:50,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-10-15 17:15:50,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-10-15 17:15:50,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 124 states have (on average 1.0806451612903225) internal successors, (134), 127 states have internal predecessors, (134), 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) [2022-10-15 17:15:50,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 140 transitions. [2022-10-15 17:15:50,173 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 140 transitions. Word has length 115 [2022-10-15 17:15:50,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:15:50,174 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 140 transitions. [2022-10-15 17:15:50,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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) [2022-10-15 17:15:50,174 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 140 transitions. [2022-10-15 17:15:50,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-10-15 17:15:50,176 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:15:50,176 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:15:50,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-15 17:15:50,389 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 [2022-10-15 17:15:50,389 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:15:50,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:15:50,390 INFO L85 PathProgramCache]: Analyzing trace with hash -874576872, now seen corresponding path program 2 times [2022-10-15 17:15:50,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:15:50,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901124219] [2022-10-15 17:15:50,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:50,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:15:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:50,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-10-15 17:15:50,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:50,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-10-15 17:15:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:50,832 INFO L134 CoverageAnalysis]: Checked inductivity of 913 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 913 trivial. 0 not checked. [2022-10-15 17:15:50,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:15:50,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901124219] [2022-10-15 17:15:50,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901124219] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:15:50,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:15:50,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 17:15:50,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633285019] [2022-10-15 17:15:50,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:15:50,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 17:15:50,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:15:50,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 17:15:50,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-15 17:15:50,835 INFO L87 Difference]: Start difference. First operand 132 states and 140 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 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) [2022-10-15 17:15:50,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:15:50,888 INFO L93 Difference]: Finished difference Result 137 states and 145 transitions. [2022-10-15 17:15:50,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 17:15:50,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 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 139 [2022-10-15 17:15:50,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:15:50,891 INFO L225 Difference]: With dead ends: 137 [2022-10-15 17:15:50,891 INFO L226 Difference]: Without dead ends: 137 [2022-10-15 17:15:50,891 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 [2022-10-15 17:15:50,893 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 53 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:15:50,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 57 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 17:15:50,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-10-15 17:15:50,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2022-10-15 17:15:50,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 127 states have (on average 1.078740157480315) internal successors, (137), 130 states have internal predecessors, (137), 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) [2022-10-15 17:15:50,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 143 transitions. [2022-10-15 17:15:50,900 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 143 transitions. Word has length 139 [2022-10-15 17:15:50,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:15:50,903 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 143 transitions. [2022-10-15 17:15:50,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 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) [2022-10-15 17:15:50,903 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 143 transitions. [2022-10-15 17:15:50,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-10-15 17:15:50,905 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:15:50,905 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 8, 8, 8, 8, 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] [2022-10-15 17:15:50,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-15 17:15:50,906 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:15:50,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:15:50,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1015854076, now seen corresponding path program 1 times [2022-10-15 17:15:50,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:15:50,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681470578] [2022-10-15 17:15:50,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:50,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:15:50,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:51,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-10-15 17:15:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:51,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-10-15 17:15:51,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 913 trivial. 0 not checked. [2022-10-15 17:15:51,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:15:51,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681470578] [2022-10-15 17:15:51,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681470578] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:15:51,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594872489] [2022-10-15 17:15:51,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:51,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:15:51,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:15:51,633 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:15:51,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-15 17:15:51,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:51,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-15 17:15:51,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:15:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 74 proven. 28 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2022-10-15 17:15:51,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:15:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 811 trivial. 0 not checked. [2022-10-15 17:15:51,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594872489] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:15:51,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:15:51,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 16 [2022-10-15 17:15:51,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966782540] [2022-10-15 17:15:51,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:15:51,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-10-15 17:15:51,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:15:51,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-10-15 17:15:51,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-10-15 17:15:51,959 INFO L87 Difference]: Start difference. First operand 135 states and 143 transitions. Second operand has 16 states, 16 states have (on average 6.125) internal successors, (98), 16 states have internal predecessors, (98), 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) [2022-10-15 17:15:52,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:15:52,081 INFO L93 Difference]: Finished difference Result 160 states and 174 transitions. [2022-10-15 17:15:52,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-15 17:15:52,081 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.125) internal successors, (98), 16 states have internal predecessors, (98), 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 144 [2022-10-15 17:15:52,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:15:52,083 INFO L225 Difference]: With dead ends: 160 [2022-10-15 17:15:52,083 INFO L226 Difference]: Without dead ends: 160 [2022-10-15 17:15:52,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-10-15 17:15:52,085 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 74 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:15:52,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 134 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:15:52,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-10-15 17:15:52,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-10-15 17:15:52,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.0909090909090908) internal successors, (168), 155 states have internal predecessors, (168), 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) [2022-10-15 17:15:52,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 174 transitions. [2022-10-15 17:15:52,091 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 174 transitions. Word has length 144 [2022-10-15 17:15:52,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:15:52,092 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 174 transitions. [2022-10-15 17:15:52,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.125) internal successors, (98), 16 states have internal predecessors, (98), 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) [2022-10-15 17:15:52,092 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 174 transitions. [2022-10-15 17:15:52,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-10-15 17:15:52,095 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:15:52,096 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 20, 20, 20, 20, 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] [2022-10-15 17:15:52,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-15 17:15:52,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:15:52,309 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:15:52,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:15:52,310 INFO L85 PathProgramCache]: Analyzing trace with hash 377300871, now seen corresponding path program 1 times [2022-10-15 17:15:52,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:15:52,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63564189] [2022-10-15 17:15:52,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:52,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:15:52,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:53,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-10-15 17:15:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:53,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-10-15 17:15:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:53,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2022-10-15 17:15:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:53,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2632 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 1594 trivial. 0 not checked. [2022-10-15 17:15:53,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:15:53,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63564189] [2022-10-15 17:15:53,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63564189] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:15:53,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467748262] [2022-10-15 17:15:53,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:53,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:15:53,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:15:53,412 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:15:53,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-15 17:15:53,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:53,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-15 17:15:53,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:15:53,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2632 backedges. 844 proven. 190 refuted. 0 times theorem prover too weak. 1598 trivial. 0 not checked. [2022-10-15 17:15:53,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:15:53,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2632 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 1594 trivial. 0 not checked. [2022-10-15 17:15:53,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467748262] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:15:53,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:15:53,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2022-10-15 17:15:53,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114010686] [2022-10-15 17:15:53,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:15:53,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-10-15 17:15:53,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:15:53,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-10-15 17:15:53,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-10-15 17:15:53,994 INFO L87 Difference]: Start difference. First operand 160 states and 174 transitions. Second operand has 22 states, 22 states have (on average 5.590909090909091) internal successors, (123), 22 states have internal predecessors, (123), 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) [2022-10-15 17:15:54,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:15:54,089 INFO L93 Difference]: Finished difference Result 200 states and 224 transitions. [2022-10-15 17:15:54,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-10-15 17:15:54,089 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.590909090909091) internal successors, (123), 22 states have internal predecessors, (123), 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 246 [2022-10-15 17:15:54,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:15:54,091 INFO L225 Difference]: With dead ends: 200 [2022-10-15 17:15:54,092 INFO L226 Difference]: Without dead ends: 200 [2022-10-15 17:15:54,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 487 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-10-15 17:15:54,093 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 125 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:15:54,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 232 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:15:54,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-10-15 17:15:54,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-10-15 17:15:54,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 194 states have (on average 1.1237113402061856) internal successors, (218), 195 states have internal predecessors, (218), 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) [2022-10-15 17:15:54,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 224 transitions. [2022-10-15 17:15:54,100 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 224 transitions. Word has length 246 [2022-10-15 17:15:54,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:15:54,101 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 224 transitions. [2022-10-15 17:15:54,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.590909090909091) internal successors, (123), 22 states have internal predecessors, (123), 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) [2022-10-15 17:15:54,101 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 224 transitions. [2022-10-15 17:15:54,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2022-10-15 17:15:54,108 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:15:54,108 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 60, 20, 20, 20, 20, 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] [2022-10-15 17:15:54,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-15 17:15:54,321 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 [2022-10-15 17:15:54,322 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:15:54,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:15:54,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1834914921, now seen corresponding path program 2 times [2022-10-15 17:15:54,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:15:54,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756704260] [2022-10-15 17:15:54,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:54,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:15:54,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:55,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-10-15 17:15:55,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:55,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-10-15 17:15:55,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:55,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 277 [2022-10-15 17:15:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8062 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8055 trivial. 0 not checked. [2022-10-15 17:15:55,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:15:55,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756704260] [2022-10-15 17:15:55,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756704260] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:15:55,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021618487] [2022-10-15 17:15:55,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 17:15:55,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:15:55,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:15:55,200 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) [2022-10-15 17:15:55,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-15 17:15:55,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 17:15:55,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:15:55,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-15 17:15:55,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:15:55,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8062 backedges. 3290 proven. 7 refuted. 0 times theorem prover too weak. 4765 trivial. 0 not checked. [2022-10-15 17:15:55,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:15:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8062 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8055 trivial. 0 not checked. [2022-10-15 17:15:55,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021618487] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:15:55,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:15:55,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-10-15 17:15:55,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810704529] [2022-10-15 17:15:55,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:15:55,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 17:15:55,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:15:55,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 17:15:55,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-15 17:15:55,676 INFO L87 Difference]: Start difference. First operand 200 states and 224 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 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) [2022-10-15 17:15:55,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:15:55,715 INFO L93 Difference]: Finished difference Result 220 states and 244 transitions. [2022-10-15 17:15:55,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 17:15:55,716 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 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 366 [2022-10-15 17:15:55,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:15:55,718 INFO L225 Difference]: With dead ends: 220 [2022-10-15 17:15:55,718 INFO L226 Difference]: Without dead ends: 220 [2022-10-15 17:15:55,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 741 GetRequests, 734 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-15 17:15:55,719 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 36 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:15:55,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 121 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 17:15:55,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-10-15 17:15:55,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2022-10-15 17:15:55,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 214 states have (on average 1.1121495327102804) internal successors, (238), 215 states have internal predecessors, (238), 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) [2022-10-15 17:15:55,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 244 transitions. [2022-10-15 17:15:55,729 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 244 transitions. Word has length 366 [2022-10-15 17:15:55,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:15:55,730 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 244 transitions. [2022-10-15 17:15:55,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 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) [2022-10-15 17:15:55,731 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 244 transitions. [2022-10-15 17:15:55,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-10-15 17:15:55,738 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:15:55,738 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 60, 20, 20, 20, 20, 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] [2022-10-15 17:15:55,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-15 17:15:55,953 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 [2022-10-15 17:15:55,954 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:15:55,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:15:55,955 INFO L85 PathProgramCache]: Analyzing trace with hash -510104215, now seen corresponding path program 3 times [2022-10-15 17:15:55,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:15:55,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772521970] [2022-10-15 17:15:55,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:55,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:15:56,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:56,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-10-15 17:15:56,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:56,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-10-15 17:15:56,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:56,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 297 [2022-10-15 17:15:56,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8136 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 8055 trivial. 0 not checked. [2022-10-15 17:15:56,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:15:56,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772521970] [2022-10-15 17:15:56,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772521970] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:15:56,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68218765] [2022-10-15 17:15:57,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 17:15:57,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:15:57,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:15:57,001 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) [2022-10-15 17:15:57,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-15 17:15:57,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-10-15 17:15:57,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:15:57,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 17:15:57,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:15:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8136 backedges. 3290 proven. 81 refuted. 0 times theorem prover too weak. 4765 trivial. 0 not checked. [2022-10-15 17:15:57,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:15:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8136 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 8055 trivial. 0 not checked. [2022-10-15 17:15:57,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68218765] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:15:57,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:15:57,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-10-15 17:15:57,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600536194] [2022-10-15 17:15:57,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:15:57,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-15 17:15:57,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:15:57,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-15 17:15:57,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-15 17:15:57,961 INFO L87 Difference]: Start difference. First operand 220 states and 244 transitions. Second operand has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 17 states have internal predecessors, (106), 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) [2022-10-15 17:15:58,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:15:58,052 INFO L93 Difference]: Finished difference Result 260 states and 284 transitions. [2022-10-15 17:15:58,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-15 17:15:58,053 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 17 states have internal predecessors, (106), 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 386 [2022-10-15 17:15:58,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:15:58,055 INFO L225 Difference]: With dead ends: 260 [2022-10-15 17:15:58,055 INFO L226 Difference]: Without dead ends: 260 [2022-10-15 17:15:58,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 770 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-15 17:15:58,057 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 84 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:15:58,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 239 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:15:58,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-10-15 17:15:58,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2022-10-15 17:15:58,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 254 states have (on average 1.094488188976378) internal successors, (278), 255 states have internal predecessors, (278), 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) [2022-10-15 17:15:58,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 284 transitions. [2022-10-15 17:15:58,065 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 284 transitions. Word has length 386 [2022-10-15 17:15:58,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:15:58,066 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 284 transitions. [2022-10-15 17:15:58,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 17 states have internal predecessors, (106), 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) [2022-10-15 17:15:58,067 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 284 transitions. [2022-10-15 17:15:58,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2022-10-15 17:15:58,076 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:15:58,076 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 60, 20, 20, 20, 20, 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] [2022-10-15 17:15:58,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-15 17:15:58,290 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 [2022-10-15 17:15:58,290 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:15:58,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:15:58,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1930993513, now seen corresponding path program 4 times [2022-10-15 17:15:58,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:15:58,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367564223] [2022-10-15 17:15:58,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:58,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:15:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:59,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-10-15 17:15:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:59,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-10-15 17:15:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:59,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2022-10-15 17:15:59,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:16:00,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8524 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 8055 trivial. 0 not checked. [2022-10-15 17:16:00,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:16:00,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367564223] [2022-10-15 17:16:00,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367564223] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:16:00,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99775933] [2022-10-15 17:16:00,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-15 17:16:00,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:16:00,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:16:00,026 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) [2022-10-15 17:16:00,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-15 17:16:03,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-15 17:16:03,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:16:03,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 1413 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-15 17:16:03,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:16:03,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8524 backedges. 3290 proven. 469 refuted. 0 times theorem prover too weak. 4765 trivial. 0 not checked. [2022-10-15 17:16:03,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:16:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8524 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 8055 trivial. 0 not checked. [2022-10-15 17:16:03,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99775933] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:16:04,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:16:04,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2022-10-15 17:16:04,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66117188] [2022-10-15 17:16:04,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:16:04,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-10-15 17:16:04,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:16:04,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-10-15 17:16:04,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-10-15 17:16:04,003 INFO L87 Difference]: Start difference. First operand 260 states and 284 transitions. Second operand has 22 states, 22 states have (on average 6.181818181818182) internal successors, (136), 22 states have internal predecessors, (136), 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) [2022-10-15 17:16:04,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:16:04,124 INFO L93 Difference]: Finished difference Result 285 states and 309 transitions. [2022-10-15 17:16:04,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-10-15 17:16:04,125 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.181818181818182) internal successors, (136), 22 states have internal predecessors, (136), 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 426 [2022-10-15 17:16:04,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:16:04,127 INFO L225 Difference]: With dead ends: 285 [2022-10-15 17:16:04,127 INFO L226 Difference]: Without dead ends: 285 [2022-10-15 17:16:04,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 873 GetRequests, 842 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-10-15 17:16:04,129 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 76 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:16:04,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 282 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:16:04,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-10-15 17:16:04,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2022-10-15 17:16:04,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 279 states have (on average 1.086021505376344) internal successors, (303), 280 states have internal predecessors, (303), 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) [2022-10-15 17:16:04,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 309 transitions. [2022-10-15 17:16:04,138 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 309 transitions. Word has length 426 [2022-10-15 17:16:04,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:16:04,139 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 309 transitions. [2022-10-15 17:16:04,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.181818181818182) internal successors, (136), 22 states have internal predecessors, (136), 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) [2022-10-15 17:16:04,139 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 309 transitions. [2022-10-15 17:16:04,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2022-10-15 17:16:04,148 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:16:04,149 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 60, 20, 20, 20, 20, 19, 19, 19, 19, 19, 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] [2022-10-15 17:16:04,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-10-15 17:16:04,362 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 [2022-10-15 17:16:04,363 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:16:04,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:16:04,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1775756541, now seen corresponding path program 5 times [2022-10-15 17:16:04,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:16:04,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828241130] [2022-10-15 17:16:04,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:16:04,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:16:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:16:21,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-10-15 17:16:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:16:22,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-10-15 17:16:22,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:16:23,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 362 [2022-10-15 17:16:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:16:24,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8929 backedges. 0 proven. 7020 refuted. 0 times theorem prover too weak. 1909 trivial. 0 not checked. [2022-10-15 17:16:24,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:16:24,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828241130] [2022-10-15 17:16:24,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828241130] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:16:24,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680188625] [2022-10-15 17:16:24,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-15 17:16:24,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:16:24,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:16:24,190 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) [2022-10-15 17:16:24,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process