/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-patterns/array26_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 16:25:29,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 16:25:29,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 16:25:29,879 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 16:25:29,880 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 16:25:29,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 16:25:29,887 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 16:25:29,905 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 16:25:29,906 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 16:25:29,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 16:25:29,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 16:25:29,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 16:25:29,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 16:25:29,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 16:25:29,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 16:25:29,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 16:25:29,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 16:25:29,916 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 16:25:29,918 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 16:25:29,920 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 16:25:29,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 16:25:29,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 16:25:29,924 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 16:25:29,925 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 16:25:29,929 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-15 16:25:29,932 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-15 16:25:29,933 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-15 16:25:29,934 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-15 16:25:29,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-15 16:25:29,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-15 16:25:29,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-15 16:25:29,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-15 16:25:29,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-15 16:25:29,938 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 16:25:29,939 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 16:25:29,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 16:25:29,940 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 16:25:29,972 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 16:25:29,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 16:25:29,974 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 16:25:29,974 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 16:25:29,976 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 16:25:29,976 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 16:25:29,978 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 16:25:29,978 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 16:25:29,979 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 16:25:29,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 16:25:29,980 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 16:25:29,980 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 16:25:29,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 16:25:29,980 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 16:25:29,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 16:25:29,981 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 16:25:29,981 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 16:25:29,981 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 16:25:29,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 16:25:29,981 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 16:25:29,982 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 16:25:29,982 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 16:25:29,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 16:25:29,982 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 16:25:29,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 16:25:29,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 16:25:29,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 16:25:29,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 16:25:29,984 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 16:25:29,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 16:25:29,984 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 16:25:30,354 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 16:25:30,380 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 16:25:30,383 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 16:25:30,384 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 16:25:30,385 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 16:25:30,386 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array26_pattern.c [2022-10-15 16:25:30,465 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6560bd03/92192bfd87174c359359d214808e6ff5/FLAG73aa10c47 [2022-10-15 16:25:31,136 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 16:25:31,136 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array26_pattern.c [2022-10-15 16:25:31,147 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6560bd03/92192bfd87174c359359d214808e6ff5/FLAG73aa10c47 [2022-10-15 16:25:31,509 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6560bd03/92192bfd87174c359359d214808e6ff5 [2022-10-15 16:25:31,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 16:25:31,522 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 16:25:31,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 16:25:31,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 16:25:31,531 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 16:25:31,532 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:25:31" (1/1) ... [2022-10-15 16:25:31,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c174326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:25:31, skipping insertion in model container [2022-10-15 16:25:31,534 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:25:31" (1/1) ... [2022-10-15 16:25:31,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 16:25:31,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 16:25:31,806 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array26_pattern.c[1324,1337] [2022-10-15 16:25:31,853 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 16:25:31,866 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 16:25:31,884 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array26_pattern.c[1324,1337] [2022-10-15 16:25:31,909 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 16:25:31,926 INFO L208 MainTranslator]: Completed translation [2022-10-15 16:25:31,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:25:31 WrapperNode [2022-10-15 16:25:31,929 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 16:25:31,930 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 16:25:31,931 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 16:25:31,931 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 16:25:31,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:25:31" (1/1) ... [2022-10-15 16:25:31,951 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:25:31" (1/1) ... [2022-10-15 16:25:31,982 INFO L138 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2022-10-15 16:25:31,983 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 16:25:31,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 16:25:31,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 16:25:31,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 16:25:31,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:25:31" (1/1) ... [2022-10-15 16:25:31,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:25:31" (1/1) ... [2022-10-15 16:25:31,998 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:25:31" (1/1) ... [2022-10-15 16:25:31,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:25:31" (1/1) ... [2022-10-15 16:25:32,005 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:25:31" (1/1) ... [2022-10-15 16:25:32,009 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:25:31" (1/1) ... [2022-10-15 16:25:32,011 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:25:31" (1/1) ... [2022-10-15 16:25:32,012 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:25:31" (1/1) ... [2022-10-15 16:25:32,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 16:25:32,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 16:25:32,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 16:25:32,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 16:25:32,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:25:31" (1/1) ... [2022-10-15 16:25:32,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 16:25:32,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:25:32,051 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 16:25:32,061 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 16:25:32,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 16:25:32,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 16:25:32,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 16:25:32,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 16:25:32,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 16:25:32,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 16:25:32,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 16:25:32,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 16:25:32,187 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 16:25:32,190 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 16:25:32,498 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 16:25:32,515 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 16:25:32,515 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-10-15 16:25:32,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:25:32 BoogieIcfgContainer [2022-10-15 16:25:32,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 16:25:32,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 16:25:32,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 16:25:32,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 16:25:32,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 04:25:31" (1/3) ... [2022-10-15 16:25:32,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d6393cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:25:32, skipping insertion in model container [2022-10-15 16:25:32,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:25:31" (2/3) ... [2022-10-15 16:25:32,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d6393cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:25:32, skipping insertion in model container [2022-10-15 16:25:32,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:25:32" (3/3) ... [2022-10-15 16:25:32,549 INFO L112 eAbstractionObserver]: Analyzing ICFG array26_pattern.c [2022-10-15 16:25:32,588 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 16:25:32,588 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-10-15 16:25:32,644 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 16:25:32,653 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;@6f1d806f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 16:25:32,654 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-10-15 16:25:32,659 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 38 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:25:32,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-15 16:25:32,666 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:25:32,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:25:32,668 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 16:25:32,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:25:32,674 INFO L85 PathProgramCache]: Analyzing trace with hash 119541713, now seen corresponding path program 1 times [2022-10-15 16:25:32,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:25:32,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699864984] [2022-10-15 16:25:32,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:32,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:25:32,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:25:32,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:25:32,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699864984] [2022-10-15 16:25:32,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-10-15 16:25:32,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650547560] [2022-10-15 16:25:32,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:32,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:32,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:25:32,860 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 16:25:32,861 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 16:25:32,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:25:32,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 1 conjunts are in the unsatisfiable core [2022-10-15 16:25:32,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:25:33,000 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 16:25:33,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:25:33,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650547560] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:25:33,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:25:33,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 16:25:33,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108322836] [2022-10-15 16:25:33,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:25:33,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-15 16:25:33,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:25:33,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-15 16:25:33,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-15 16:25:33,071 INFO L87 Difference]: Start difference. First operand has 39 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 38 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 16:25:33,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:25:33,092 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-10-15 16:25:33,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-15 16:25:33,094 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 16:25:33,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:25:33,102 INFO L225 Difference]: With dead ends: 39 [2022-10-15 16:25:33,102 INFO L226 Difference]: Without dead ends: 37 [2022-10-15 16:25:33,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-15 16:25:33,109 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 16:25:33,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 16:25:33,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-10-15 16:25:33,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-10-15 16:25:33,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 36 states have internal predecessors, (42), 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 16:25:33,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-10-15 16:25:33,148 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 8 [2022-10-15 16:25:33,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:25:33,149 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-10-15 16:25:33,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 16:25:33,149 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-10-15 16:25:33,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-15 16:25:33,150 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:25:33,150 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:25:33,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-10-15 16:25:33,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-10-15 16:25:33,365 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 16:25:33,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:25:33,367 INFO L85 PathProgramCache]: Analyzing trace with hash 176800015, now seen corresponding path program 1 times [2022-10-15 16:25:33,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:25:33,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49254434] [2022-10-15 16:25:33,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:33,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:25:33,388 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:25:33,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [249354809] [2022-10-15 16:25:33,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:33,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:33,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:25:33,390 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 16:25:33,411 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 16:25:33,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:25:33,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-15 16:25:33,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:25:33,513 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 16:25:33,541 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 16:25:33,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:25:33,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:25:33,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49254434] [2022-10-15 16:25:33,546 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:25:33,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249354809] [2022-10-15 16:25:33,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249354809] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:25:33,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:25:33,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 16:25:33,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874084344] [2022-10-15 16:25:33,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:25:33,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 16:25:33,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:25:33,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 16:25:33,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:25:33,550 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 16:25:33,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:25:33,608 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2022-10-15 16:25:33,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 16:25:33,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 16:25:33,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:25:33,612 INFO L225 Difference]: With dead ends: 33 [2022-10-15 16:25:33,612 INFO L226 Difference]: Without dead ends: 33 [2022-10-15 16:25:33,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 16:25:33,615 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 16:25:33,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 30 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 16:25:33,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-10-15 16:25:33,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-10-15 16:25:33,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 32 states have internal predecessors, (38), 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 16:25:33,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-10-15 16:25:33,622 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 8 [2022-10-15 16:25:33,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:25:33,622 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-10-15 16:25:33,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 16:25:33,623 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-10-15 16:25:33,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-15 16:25:33,624 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:25:33,624 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:25:33,656 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 16:25:33,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-10-15 16:25:33,839 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 16:25:33,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:25:33,841 INFO L85 PathProgramCache]: Analyzing trace with hash 176800016, now seen corresponding path program 1 times [2022-10-15 16:25:33,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:25:33,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310721498] [2022-10-15 16:25:33,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:33,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:25:33,857 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:25:33,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313919426] [2022-10-15 16:25:33,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:33,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:33,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:25:33,860 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 16:25:33,867 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 16:25:33,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:25:33,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-15 16:25:33,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:25:34,111 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 16:25:34,259 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 16:25:34,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:25:34,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:25:34,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310721498] [2022-10-15 16:25:34,260 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:25:34,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313919426] [2022-10-15 16:25:34,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313919426] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:25:34,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:25:34,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-15 16:25:34,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547643208] [2022-10-15 16:25:34,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:25:34,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 16:25:34,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:25:34,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 16:25:34,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-10-15 16:25:34,267 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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 16:25:34,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:25:34,546 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-10-15 16:25:34,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 16:25:34,547 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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 16:25:34,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:25:34,550 INFO L225 Difference]: With dead ends: 49 [2022-10-15 16:25:34,551 INFO L226 Difference]: Without dead ends: 49 [2022-10-15 16:25:34,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-10-15 16:25:34,560 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 102 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:25:34,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 26 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:25:34,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-10-15 16:25:34,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2022-10-15 16:25:34,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.394736842105263) internal successors, (53), 43 states have internal predecessors, (53), 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 16:25:34,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2022-10-15 16:25:34,582 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 8 [2022-10-15 16:25:34,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:25:34,582 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2022-10-15 16:25:34,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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 16:25:34,583 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2022-10-15 16:25:34,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-15 16:25:34,584 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:25:34,584 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:25:34,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-10-15 16:25:34,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:34,798 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 16:25:34,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:25:34,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1809589506, now seen corresponding path program 1 times [2022-10-15 16:25:34,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:25:34,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894028829] [2022-10-15 16:25:34,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:34,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:25:34,837 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:25:34,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1576759066] [2022-10-15 16:25:34,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:34,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:34,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:25:34,842 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 16:25:34,848 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 16:25:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:25:34,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-15 16:25:34,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:25:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:25:34,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:25:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:25:35,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:25:35,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894028829] [2022-10-15 16:25:35,010 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:25:35,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576759066] [2022-10-15 16:25:35,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576759066] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:25:35,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:25:35,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-10-15 16:25:35,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893879258] [2022-10-15 16:25:35,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:25:35,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 16:25:35,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:25:35,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 16:25:35,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-15 16:25:35,013 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:25:35,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:25:35,182 INFO L93 Difference]: Finished difference Result 131 states and 155 transitions. [2022-10-15 16:25:35,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 16:25:35,183 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-10-15 16:25:35,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:25:35,186 INFO L225 Difference]: With dead ends: 131 [2022-10-15 16:25:35,186 INFO L226 Difference]: Without dead ends: 131 [2022-10-15 16:25:35,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-15 16:25:35,188 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 94 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 16:25:35,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 120 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 16:25:35,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-10-15 16:25:35,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 54. [2022-10-15 16:25:35,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 53 states have internal predecessors, (67), 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 16:25:35,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2022-10-15 16:25:35,198 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 13 [2022-10-15 16:25:35,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:25:35,199 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2022-10-15 16:25:35,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:25:35,199 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2022-10-15 16:25:35,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-15 16:25:35,200 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:25:35,200 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:25:35,235 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 16:25:35,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:35,416 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 16:25:35,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:25:35,417 INFO L85 PathProgramCache]: Analyzing trace with hash -262693654, now seen corresponding path program 1 times [2022-10-15 16:25:35,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:25:35,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302300961] [2022-10-15 16:25:35,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:35,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:25:35,433 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:25:35,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1741355513] [2022-10-15 16:25:35,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:35,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:35,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:25:35,435 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 16:25:35,458 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 16:25:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:25:35,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-15 16:25:35,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:25:35,569 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 16:25:36,915 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 16:25:36,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:25:47,729 WARN L855 $PredicateComparison]: unable to prove that (or (not (< 1 c_~ARR_SIZE~0)) (let ((.cse1 (mod c_~ARR_SIZE~0 4294967296))) (let ((.cse0 (* (* .cse1 .cse1) 4))) (and (or (< .cse0 4) (< 7 .cse0)) (< (* .cse1 34359738368) (+ 73786976294838206457 .cse0)))))) is different from true [2022-10-15 16:25:49,803 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 16:25:49,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:25:49,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302300961] [2022-10-15 16:25:49,804 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:25:49,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741355513] [2022-10-15 16:25:49,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741355513] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:25:49,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:25:49,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-10-15 16:25:49,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224707230] [2022-10-15 16:25:49,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:25:49,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-15 16:25:49,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:25:49,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-15 16:25:49,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=103, Unknown=1, NotChecked=22, Total=182 [2022-10-15 16:25:49,807 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 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 16:25:53,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:25:53,730 INFO L93 Difference]: Finished difference Result 99 states and 124 transitions. [2022-10-15 16:25:53,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-10-15 16:25:53,732 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 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 14 [2022-10-15 16:25:53,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:25:53,735 INFO L225 Difference]: With dead ends: 99 [2022-10-15 16:25:53,735 INFO L226 Difference]: Without dead ends: 99 [2022-10-15 16:25:53,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=228, Invalid=425, Unknown=1, NotChecked=48, Total=702 [2022-10-15 16:25:53,736 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 152 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-15 16:25:53,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 58 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 236 Invalid, 0 Unknown, 69 Unchecked, 1.0s Time] [2022-10-15 16:25:53,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-10-15 16:25:53,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 67. [2022-10-15 16:25:53,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 66 states have internal predecessors, (84), 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 16:25:53,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2022-10-15 16:25:53,746 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 14 [2022-10-15 16:25:53,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:25:53,747 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2022-10-15 16:25:53,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 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 16:25:53,747 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2022-10-15 16:25:53,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-15 16:25:53,748 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:25:53,749 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:25:53,778 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 16:25:53,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:53,954 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 16:25:53,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:25:53,956 INFO L85 PathProgramCache]: Analyzing trace with hash 913040198, now seen corresponding path program 1 times [2022-10-15 16:25:53,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:25:53,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598389888] [2022-10-15 16:25:53,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:53,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:25:53,971 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:25:53,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808329801] [2022-10-15 16:25:53,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:53,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:53,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:25:53,990 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 16:25:54,011 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 16:25:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:25:54,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-15 16:25:54,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:25:54,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:25:54,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:25:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:25:54,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:25:54,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598389888] [2022-10-15 16:25:54,177 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:25:54,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808329801] [2022-10-15 16:25:54,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808329801] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:25:54,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:25:54,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-10-15 16:25:54,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193567375] [2022-10-15 16:25:54,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:25:54,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-15 16:25:54,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:25:54,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-15 16:25:54,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-10-15 16:25:54,180 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 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 16:25:54,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:25:54,668 INFO L93 Difference]: Finished difference Result 174 states and 203 transitions. [2022-10-15 16:25:54,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-15 16:25:54,668 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-10-15 16:25:54,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:25:54,669 INFO L225 Difference]: With dead ends: 174 [2022-10-15 16:25:54,670 INFO L226 Difference]: Without dead ends: 174 [2022-10-15 16:25:54,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=334, Unknown=0, NotChecked=0, Total=506 [2022-10-15 16:25:54,671 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 254 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 16:25:54,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 78 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 16:25:54,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-10-15 16:25:54,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 107. [2022-10-15 16:25:54,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 101 states have (on average 1.4059405940594059) internal successors, (142), 106 states have internal predecessors, (142), 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 16:25:54,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 142 transitions. [2022-10-15 16:25:54,684 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 142 transitions. Word has length 16 [2022-10-15 16:25:54,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:25:54,684 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 142 transitions. [2022-10-15 16:25:54,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 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 16:25:54,685 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 142 transitions. [2022-10-15 16:25:54,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-15 16:25:54,686 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:25:54,686 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:25:54,710 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 16:25:54,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:54,890 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 16:25:54,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:25:54,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1761412513, now seen corresponding path program 1 times [2022-10-15 16:25:54,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:25:54,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846538093] [2022-10-15 16:25:54,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:54,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:25:54,918 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:25:54,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [923081699] [2022-10-15 16:25:54,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:54,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:54,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:25:54,920 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 16:25:54,925 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 16:25:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:25:54,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 16:25:54,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:25:55,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:25:55,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:25:55,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:25:55,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:25:55,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846538093] [2022-10-15 16:25:55,074 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:25:55,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923081699] [2022-10-15 16:25:55,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923081699] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:25:55,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:25:55,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-10-15 16:25:55,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293195871] [2022-10-15 16:25:55,075 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:25:55,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 16:25:55,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:25:55,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 16:25:55,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-10-15 16:25:55,077 INFO L87 Difference]: Start difference. First operand 107 states and 142 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:25:55,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:25:55,423 INFO L93 Difference]: Finished difference Result 117 states and 140 transitions. [2022-10-15 16:25:55,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 16:25:55,424 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-10-15 16:25:55,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:25:55,425 INFO L225 Difference]: With dead ends: 117 [2022-10-15 16:25:55,426 INFO L226 Difference]: Without dead ends: 117 [2022-10-15 16:25:55,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-10-15 16:25:55,427 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 132 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 16:25:55,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 40 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 16:25:55,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-10-15 16:25:55,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 97. [2022-10-15 16:25:55,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 91 states have (on average 1.3406593406593406) internal successors, (122), 96 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:25:55,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 122 transitions. [2022-10-15 16:25:55,436 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 122 transitions. Word has length 17 [2022-10-15 16:25:55,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:25:55,437 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 122 transitions. [2022-10-15 16:25:55,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:25:55,437 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 122 transitions. [2022-10-15 16:25:55,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-15 16:25:55,438 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:25:55,438 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:25:55,479 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 16:25:55,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:55,653 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 16:25:55,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:25:55,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1065287056, now seen corresponding path program 1 times [2022-10-15 16:25:55,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:25:55,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017855198] [2022-10-15 16:25:55,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:55,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:25:55,667 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:25:55,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343601985] [2022-10-15 16:25:55,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:55,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:55,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:25:55,669 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 16:25:55,672 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 16:25:55,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:25:55,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-15 16:25:55,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:25:55,775 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:25:55,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:25:56,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:25:56,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:25:56,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017855198] [2022-10-15 16:25:56,035 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:25:56,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343601985] [2022-10-15 16:25:56,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343601985] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:25:56,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:25:56,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2022-10-15 16:25:56,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516885851] [2022-10-15 16:25:56,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:25:56,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-15 16:25:56,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:25:56,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-15 16:25:56,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-10-15 16:25:56,038 INFO L87 Difference]: Start difference. First operand 97 states and 122 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 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 16:25:56,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:25:56,292 INFO L93 Difference]: Finished difference Result 200 states and 235 transitions. [2022-10-15 16:25:56,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 16:25:56,293 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 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 21 [2022-10-15 16:25:56,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:25:56,295 INFO L225 Difference]: With dead ends: 200 [2022-10-15 16:25:56,295 INFO L226 Difference]: Without dead ends: 200 [2022-10-15 16:25:56,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-10-15 16:25:56,297 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 289 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 16:25:56,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 132 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 16:25:56,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-10-15 16:25:56,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 108. [2022-10-15 16:25:56,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 102 states have (on average 1.3137254901960784) internal successors, (134), 107 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:25:56,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 134 transitions. [2022-10-15 16:25:56,321 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 134 transitions. Word has length 21 [2022-10-15 16:25:56,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:25:56,321 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 134 transitions. [2022-10-15 16:25:56,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 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 16:25:56,322 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 134 transitions. [2022-10-15 16:25:56,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-15 16:25:56,323 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:25:56,323 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:25:56,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-10-15 16:25:56,532 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,SelfDestructingSolverStorable7 [2022-10-15 16:25:56,533 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 16:25:56,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:25:56,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1335845816, now seen corresponding path program 1 times [2022-10-15 16:25:56,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:25:56,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545272791] [2022-10-15 16:25:56,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:56,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:25:56,557 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:25:56,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800023468] [2022-10-15 16:25:56,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:56,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:56,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:25:56,560 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 16:25:56,562 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 16:25:56,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:25:56,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 19 conjunts are in the unsatisfiable core [2022-10-15 16:25:56,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:25:56,660 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 16:25:58,264 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:25:58,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:26:04,319 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:26:04,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:26:04,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545272791] [2022-10-15 16:26:04,320 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:26:04,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800023468] [2022-10-15 16:26:04,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800023468] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:26:04,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:26:04,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-10-15 16:26:04,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274777489] [2022-10-15 16:26:04,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:26:04,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-15 16:26:04,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:26:04,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-15 16:26:04,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=229, Unknown=1, NotChecked=0, Total=306 [2022-10-15 16:26:04,327 INFO L87 Difference]: Start difference. First operand 108 states and 134 transitions. Second operand has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 18 states have internal predecessors, (41), 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 16:26:05,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-10-15 16:26:13,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-10-15 16:26:26,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers []