/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-lopstr16/motivex.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 16:22:13,843 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 16:22:13,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 16:22:13,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-10-15 16:22:13,918 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 16:22:13,919 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 16:22:13,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 16:22:13,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 16:22:13,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 16:22:13,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 16:22:13,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 16:22:13,930 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 16:22:13,932 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 16:22:13,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 16:22:13,935 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 16:22:13,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 16:22:13,941 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-15 16:22:13,953 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 16:22:13,954 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 16:22:13,955 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 16:22:13,956 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 16:22:13,993 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 16:22:13,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 16:22:13,993 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 16:22:13,994 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 16:22:13,995 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 16:22:13,995 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 16:22:13,996 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 16:22:13,996 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 16:22:13,996 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 16:22:13,997 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 16:22:13,997 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 16:22:13,997 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 16:22:13,997 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 16:22:13,998 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 16:22:13,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 16:22:13,998 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 16:22:13,998 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 16:22:13,999 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 16:22:13,999 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 16:22:13,999 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 16:22:13,999 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 16:22:13,999 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 16:22:14,000 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 16:22:14,000 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 16:22:14,000 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 16:22:14,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 16:22:14,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 16:22:14,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 16:22:14,001 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 16:22:14,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 16:22:14,002 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 16:22:14,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 16:22:14,482 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 16:22:14,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 16:22:14,487 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 16:22:14,489 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 16:22:14,490 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-lopstr16/motivex.i [2022-10-15 16:22:14,584 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c307b2d93/fd9e7997d4fd447786e36c8ec08d962f/FLAGe2819ad49 [2022-10-15 16:22:15,223 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 16:22:15,224 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/motivex.i [2022-10-15 16:22:15,237 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c307b2d93/fd9e7997d4fd447786e36c8ec08d962f/FLAGe2819ad49 [2022-10-15 16:22:15,595 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c307b2d93/fd9e7997d4fd447786e36c8ec08d962f [2022-10-15 16:22:15,601 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 16:22:15,608 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 16:22:15,614 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 16:22:15,615 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 16:22:15,620 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 16:22:15,621 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:22:15" (1/1) ... [2022-10-15 16:22:15,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61047d0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:15, skipping insertion in model container [2022-10-15 16:22:15,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:22:15" (1/1) ... [2022-10-15 16:22:15,634 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 16:22:15,660 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 16:22:15,936 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-lopstr16/motivex.i[800,813] [2022-10-15 16:22:15,976 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 16:22:16,359 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 16:22:16,374 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-lopstr16/motivex.i[800,813] [2022-10-15 16:22:16,383 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 16:22:16,402 INFO L208 MainTranslator]: Completed translation [2022-10-15 16:22:16,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:16 WrapperNode [2022-10-15 16:22:16,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 16:22:16,405 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 16:22:16,405 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 16:22:16,405 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 16:22:16,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:16" (1/1) ... [2022-10-15 16:22:16,425 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:16" (1/1) ... [2022-10-15 16:22:16,452 INFO L138 Inliner]: procedures = 15, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2022-10-15 16:22:16,453 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 16:22:16,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 16:22:16,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 16:22:16,454 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 16:22:16,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:16" (1/1) ... [2022-10-15 16:22:16,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:16" (1/1) ... [2022-10-15 16:22:16,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:16" (1/1) ... [2022-10-15 16:22:16,470 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:16" (1/1) ... [2022-10-15 16:22:16,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:16" (1/1) ... [2022-10-15 16:22:16,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:16" (1/1) ... [2022-10-15 16:22:16,500 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:16" (1/1) ... [2022-10-15 16:22:16,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:16" (1/1) ... [2022-10-15 16:22:16,511 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 16:22:16,513 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 16:22:16,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 16:22:16,513 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 16:22:16,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:16" (1/1) ... [2022-10-15 16:22:16,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 16:22:16,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:22:16,562 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 16:22:16,584 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 16:22:16,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 16:22:16,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 16:22:16,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 16:22:16,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 16:22:16,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 16:22:16,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 16:22:16,723 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 16:22:16,725 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 16:22:17,124 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 16:22:17,134 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 16:22:17,134 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-15 16:22:17,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:22:17 BoogieIcfgContainer [2022-10-15 16:22:17,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 16:22:17,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 16:22:17,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 16:22:17,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 16:22:17,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 04:22:15" (1/3) ... [2022-10-15 16:22:17,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@716c171a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:22:17, skipping insertion in model container [2022-10-15 16:22:17,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:16" (2/3) ... [2022-10-15 16:22:17,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@716c171a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:22:17, skipping insertion in model container [2022-10-15 16:22:17,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:22:17" (3/3) ... [2022-10-15 16:22:17,160 INFO L112 eAbstractionObserver]: Analyzing ICFG motivex.i [2022-10-15 16:22:17,190 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 16:22:17,191 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-10-15 16:22:17,293 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 16:22:17,308 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;@2de4707f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 16:22:17,309 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-10-15 16:22:17,316 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 50 states have internal predecessors, (59), 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 16:22:17,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 16:22:17,326 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:17,327 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 16:22:17,328 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 16:22:17,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:17,338 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-10-15 16:22:17,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:17,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855273211] [2022-10-15 16:22:17,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:17,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:17,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:22:17,676 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 16:22:17,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:22:17,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855273211] [2022-10-15 16:22:17,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855273211] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:22:17,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:22:17,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 16:22:17,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744033932] [2022-10-15 16:22:17,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:22:17,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 16:22:17,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:22:17,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 16:22:17,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:22:17,729 INFO L87 Difference]: Start difference. First operand has 51 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:22:17,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:22:17,804 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-10-15 16:22:17,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 16:22:17,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 16:22:17,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:22:17,816 INFO L225 Difference]: With dead ends: 42 [2022-10-15 16:22:17,816 INFO L226 Difference]: Without dead ends: 40 [2022-10-15 16:22:17,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 16:22:17,823 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 43 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 16:22:17,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 25 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 16:22:17,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-10-15 16:22:17,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-10-15 16:22:17,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:22:17,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-10-15 16:22:17,864 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 4 [2022-10-15 16:22:17,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:22:17,865 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-10-15 16:22:17,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:22:17,865 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-10-15 16:22:17,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 16:22:17,866 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:17,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 16:22:17,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 16:22:17,867 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 16:22:17,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:17,868 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-10-15 16:22:17,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:17,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81542772] [2022-10-15 16:22:17,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:17,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:17,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:22:18,225 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 16:22:18,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:22:18,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81542772] [2022-10-15 16:22:18,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81542772] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:22:18,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:22:18,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 16:22:18,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105139966] [2022-10-15 16:22:18,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:22:18,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 16:22:18,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:22:18,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 16:22:18,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 16:22:18,231 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:22:18,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:22:18,406 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2022-10-15 16:22:18,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 16:22:18,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 16:22:18,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:22:18,409 INFO L225 Difference]: With dead ends: 64 [2022-10-15 16:22:18,409 INFO L226 Difference]: Without dead ends: 64 [2022-10-15 16:22:18,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 16:22:18,412 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 88 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:22:18,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 33 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:22:18,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-10-15 16:22:18,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2022-10-15 16:22:18,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 54 states have internal predecessors, (61), 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 16:22:18,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2022-10-15 16:22:18,428 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 4 [2022-10-15 16:22:18,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:22:18,428 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2022-10-15 16:22:18,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:22:18,429 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2022-10-15 16:22:18,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-15 16:22:18,429 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:18,430 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-10-15 16:22:18,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 16:22:18,430 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 16:22:18,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:18,431 INFO L85 PathProgramCache]: Analyzing trace with hash 264437835, now seen corresponding path program 1 times [2022-10-15 16:22:18,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:18,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594984726] [2022-10-15 16:22:18,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:18,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:18,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:22:18,709 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 16:22:18,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:22:18,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594984726] [2022-10-15 16:22:18,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594984726] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:22:18,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113072935] [2022-10-15 16:22:18,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:18,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:18,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:22:18,719 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 16:22:18,726 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 16:22:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:22:18,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-15 16:22:18,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:22:18,926 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 16:22:18,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:22:19,026 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 16:22:19,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113072935] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:22:19,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:22:19,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-10-15 16:22:19,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720878992] [2022-10-15 16:22:19,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:22:19,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-15 16:22:19,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:22:19,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-15 16:22:19,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-10-15 16:22:19,031 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 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 16:22:19,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:22:19,472 INFO L93 Difference]: Finished difference Result 114 states and 125 transitions. [2022-10-15 16:22:19,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 16:22:19,472 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 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 16:22:19,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:22:19,474 INFO L225 Difference]: With dead ends: 114 [2022-10-15 16:22:19,474 INFO L226 Difference]: Without dead ends: 114 [2022-10-15 16:22:19,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-10-15 16:22:19,477 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 440 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 16:22:19,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 94 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 16:22:19,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-10-15 16:22:19,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2022-10-15 16:22:19,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.1862745098039216) internal successors, (121), 106 states have internal predecessors, (121), 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 16:22:19,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 121 transitions. [2022-10-15 16:22:19,490 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 121 transitions. Word has length 8 [2022-10-15 16:22:19,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:22:19,491 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 121 transitions. [2022-10-15 16:22:19,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 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 16:22:19,491 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 121 transitions. [2022-10-15 16:22:19,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-15 16:22:19,492 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:19,492 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2022-10-15 16:22:19,521 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 16:22:19,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:19,708 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 16:22:19,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:19,709 INFO L85 PathProgramCache]: Analyzing trace with hash -865246886, now seen corresponding path program 2 times [2022-10-15 16:22:19,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:19,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16853977] [2022-10-15 16:22:19,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:19,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:22:20,273 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:22:20,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:22:20,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16853977] [2022-10-15 16:22:20,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16853977] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:22:20,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933087972] [2022-10-15 16:22:20,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:22:20,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:20,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:22:20,283 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 16:22:20,292 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 16:22:20,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 16:22:20,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:22:20,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-15 16:22:20,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:22:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:22:20,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:22:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:22:20,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933087972] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:22:20,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:22:20,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2022-10-15 16:22:20,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345319485] [2022-10-15 16:22:20,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:22:20,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-10-15 16:22:20,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:22:20,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-10-15 16:22:20,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2022-10-15 16:22:20,884 INFO L87 Difference]: Start difference. First operand 107 states and 121 transitions. Second operand has 20 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 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 16:22:22,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:22:22,008 INFO L93 Difference]: Finished difference Result 258 states and 281 transitions. [2022-10-15 16:22:22,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-15 16:22:22,009 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-10-15 16:22:22,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:22:22,011 INFO L225 Difference]: With dead ends: 258 [2022-10-15 16:22:22,012 INFO L226 Difference]: Without dead ends: 258 [2022-10-15 16:22:22,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2022-10-15 16:22:22,014 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 1142 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1142 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-15 16:22:22,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1142 Valid, 560 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-15 16:22:22,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-10-15 16:22:22,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 239. [2022-10-15 16:22:22,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.1581196581196582) internal successors, (271), 238 states have internal predecessors, (271), 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 16:22:22,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 271 transitions. [2022-10-15 16:22:22,033 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 271 transitions. Word has length 20 [2022-10-15 16:22:22,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:22:22,033 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 271 transitions. [2022-10-15 16:22:22,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 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 16:22:22,034 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 271 transitions. [2022-10-15 16:22:22,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-10-15 16:22:22,035 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:22,036 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1] [2022-10-15 16:22:22,072 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 16:22:22,249 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,SelfDestructingSolverStorable3 [2022-10-15 16:22:22,250 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 16:22:22,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:22,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1676118008, now seen corresponding path program 3 times [2022-10-15 16:22:22,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:22,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657393119] [2022-10-15 16:22:22,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:22,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:22,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:22:22,999 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:22:23,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:22:23,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657393119] [2022-10-15 16:22:23,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657393119] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:22:23,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62622425] [2022-10-15 16:22:23,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 16:22:23,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:23,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:22:23,002 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 16:22:23,011 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 16:22:23,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-10-15 16:22:23,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:22:23,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 28 conjunts are in the unsatisfiable core [2022-10-15 16:22:23,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:22:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:22:24,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:22:24,722 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:22:24,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62622425] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:22:24,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:22:24,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2022-10-15 16:22:24,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509708143] [2022-10-15 16:22:24,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:22:24,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-10-15 16:22:24,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:22:24,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-10-15 16:22:24,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=1045, Unknown=0, NotChecked=0, Total=1406 [2022-10-15 16:22:24,726 INFO L87 Difference]: Start difference. First operand 239 states and 271 transitions. Second operand has 38 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 states have internal predecessors, (132), 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 16:22:28,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:22:28,496 INFO L93 Difference]: Finished difference Result 546 states and 593 transitions. [2022-10-15 16:22:28,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-10-15 16:22:28,497 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 states have internal predecessors, (132), 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 44 [2022-10-15 16:22:28,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:22:28,500 INFO L225 Difference]: With dead ends: 546 [2022-10-15 16:22:28,500 INFO L226 Difference]: Without dead ends: 546 [2022-10-15 16:22:28,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=883, Invalid=2777, Unknown=0, NotChecked=0, Total=3660 [2022-10-15 16:22:28,503 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 3038 mSDsluCounter, 2566 mSDsCounter, 0 mSdLazyCounter, 3809 mSolverCounterSat, 410 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3038 SdHoareTripleChecker+Valid, 2696 SdHoareTripleChecker+Invalid, 4219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 410 IncrementalHoareTripleChecker+Valid, 3809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-10-15 16:22:28,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3038 Valid, 2696 Invalid, 4219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [410 Valid, 3809 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-10-15 16:22:28,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-10-15 16:22:28,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 503. [2022-10-15 16:22:28,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 498 states have (on average 1.1465863453815262) internal successors, (571), 502 states have internal predecessors, (571), 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 16:22:28,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 571 transitions. [2022-10-15 16:22:28,531 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 571 transitions. Word has length 44 [2022-10-15 16:22:28,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:22:28,532 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 571 transitions. [2022-10-15 16:22:28,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 states have internal predecessors, (132), 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 16:22:28,532 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 571 transitions. [2022-10-15 16:22:28,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-10-15 16:22:28,535 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:28,536 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1] [2022-10-15 16:22:28,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-15 16:22:28,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:28,751 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 16:22:28,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:28,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1914542284, now seen corresponding path program 4 times [2022-10-15 16:22:28,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:28,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845110783] [2022-10-15 16:22:28,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:28,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:22:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:22:30,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:22:30,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845110783] [2022-10-15 16:22:30,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845110783] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:22:30,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018508934] [2022-10-15 16:22:30,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-15 16:22:30,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:30,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:22:30,603 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 16:22:30,621 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 16:22:33,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-15 16:22:33,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:22:33,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 51 conjunts are in the unsatisfiable core [2022-10-15 16:22:33,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:22:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:22:35,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:22:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:22:37,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018508934] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:22:37,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:22:37,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 74 [2022-10-15 16:22:37,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804322166] [2022-10-15 16:22:37,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:22:37,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-10-15 16:22:37,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:22:37,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-10-15 16:22:37,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1352, Invalid=4348, Unknown=0, NotChecked=0, Total=5700 [2022-10-15 16:22:37,922 INFO L87 Difference]: Start difference. First operand 503 states and 571 transitions. Second operand has 76 states, 75 states have (on average 3.68) internal successors, (276), 75 states have internal predecessors, (276), 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 16:22:56,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:22:56,548 INFO L93 Difference]: Finished difference Result 1122 states and 1217 transitions. [2022-10-15 16:22:56,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-10-15 16:22:56,552 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 3.68) internal successors, (276), 75 states have internal predecessors, (276), 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 92 [2022-10-15 16:22:56,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:22:56,558 INFO L225 Difference]: With dead ends: 1122 [2022-10-15 16:22:56,559 INFO L226 Difference]: Without dead ends: 1122 [2022-10-15 16:22:56,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2902 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=3291, Invalid=11715, Unknown=0, NotChecked=0, Total=15006 [2022-10-15 16:22:56,565 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 11561 mSDsluCounter, 11666 mSDsCounter, 0 mSdLazyCounter, 16503 mSolverCounterSat, 1387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11561 SdHoareTripleChecker+Valid, 11928 SdHoareTripleChecker+Invalid, 17890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1387 IncrementalHoareTripleChecker+Valid, 16503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-10-15 16:22:56,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11561 Valid, 11928 Invalid, 17890 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1387 Valid, 16503 Invalid, 0 Unknown, 0 Unchecked, 10.6s Time] [2022-10-15 16:22:56,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2022-10-15 16:22:56,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1031. [2022-10-15 16:22:56,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1026 states have (on average 1.1413255360623782) internal successors, (1171), 1030 states have internal predecessors, (1171), 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 16:22:56,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1171 transitions. [2022-10-15 16:22:56,616 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1171 transitions. Word has length 92 [2022-10-15 16:22:56,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:22:56,617 INFO L495 AbstractCegarLoop]: Abstraction has 1031 states and 1171 transitions. [2022-10-15 16:22:56,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 3.68) internal successors, (276), 75 states have internal predecessors, (276), 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 16:22:56,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1171 transitions. [2022-10-15 16:22:56,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-10-15 16:22:56,626 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:56,626 INFO L195 NwaCegarLoop]: trace histogram [47, 46, 46, 46, 1, 1, 1] [2022-10-15 16:22:56,663 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 16:22:56,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:56,841 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 16:22:56,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:56,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1803915860, now seen corresponding path program 5 times [2022-10-15 16:22:56,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:56,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738771362] [2022-10-15 16:22:56,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:56,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:23:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:23:02,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:23:02,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738771362] [2022-10-15 16:23:02,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738771362] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:23:02,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062230626] [2022-10-15 16:23:02,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-15 16:23:02,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:02,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:23:02,313 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 16:23:02,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process