/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_strcpy_original-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-16 05:35:15,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-16 05:35:15,537 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-16 05:35:15,581 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-16 05:35:15,581 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-16 05:35:15,583 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-16 05:35:15,584 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-16 05:35:15,587 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-16 05:35:15,589 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-16 05:35:15,590 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-16 05:35:15,591 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-16 05:35:15,592 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-16 05:35:15,593 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-16 05:35:15,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-16 05:35:15,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-16 05:35:15,597 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-16 05:35:15,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-16 05:35:15,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-16 05:35:15,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-16 05:35:15,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-16 05:35:15,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-16 05:35:15,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-16 05:35:15,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-16 05:35:15,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-16 05:35:15,614 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-16 05:35:15,624 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-16 05:35:15,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-16 05:35:15,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-16 05:35:15,629 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-16 05:35:15,657 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-16 05:35:15,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-16 05:35:15,658 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-16 05:35:15,658 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-16 05:35:15,659 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-16 05:35:15,659 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-16 05:35:15,660 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-16 05:35:15,660 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-16 05:35:15,660 INFO L138 SettingsManager]: * Use SBE=true [2022-10-16 05:35:15,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-16 05:35:15,661 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-16 05:35:15,661 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-16 05:35:15,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-16 05:35:15,661 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-16 05:35:15,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-16 05:35:15,662 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-16 05:35:15,662 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-16 05:35:15,662 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-16 05:35:15,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-16 05:35:15,662 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-16 05:35:15,663 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-16 05:35:15,663 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-16 05:35:15,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-16 05:35:15,663 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-16 05:35:15,663 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-16 05:35:15,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 05:35:15,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-16 05:35:15,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-16 05:35:15,664 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-16 05:35:15,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-16 05:35:15,665 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-16 05:35:16,050 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-16 05:35:16,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-16 05:35:16,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-16 05:35:16,079 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-16 05:35:16,080 INFO L275 PluginConnector]: CDTParser initialized [2022-10-16 05:35:16,081 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_strcpy_original-2.i [2022-10-16 05:35:16,167 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12ac74bb6/f51f3bb952844bbf95891feefa378755/FLAGf5850df03 [2022-10-16 05:35:16,834 INFO L306 CDTParser]: Found 1 translation units. [2022-10-16 05:35:16,835 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_original-2.i [2022-10-16 05:35:16,842 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12ac74bb6/f51f3bb952844bbf95891feefa378755/FLAGf5850df03 [2022-10-16 05:35:17,209 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12ac74bb6/f51f3bb952844bbf95891feefa378755 [2022-10-16 05:35:17,215 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-16 05:35:17,222 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-16 05:35:17,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-16 05:35:17,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-16 05:35:17,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-16 05:35:17,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:35:17" (1/1) ... [2022-10-16 05:35:17,231 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62558489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:35:17, skipping insertion in model container [2022-10-16 05:35:17,231 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:35:17" (1/1) ... [2022-10-16 05:35:17,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-16 05:35:17,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-16 05:35:17,418 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_original-2.i[896,909] [2022-10-16 05:35:17,434 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 05:35:17,442 INFO L203 MainTranslator]: Completed pre-run [2022-10-16 05:35:17,457 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_original-2.i[896,909] [2022-10-16 05:35:17,469 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 05:35:17,488 INFO L208 MainTranslator]: Completed translation [2022-10-16 05:35:17,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:35:17 WrapperNode [2022-10-16 05:35:17,490 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-16 05:35:17,494 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-16 05:35:17,494 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-16 05:35:17,495 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-16 05:35:17,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:35:17" (1/1) ... [2022-10-16 05:35:17,523 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:35:17" (1/1) ... [2022-10-16 05:35:17,543 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2022-10-16 05:35:17,544 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-16 05:35:17,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-16 05:35:17,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-16 05:35:17,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-16 05:35:17,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:35:17" (1/1) ... [2022-10-16 05:35:17,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:35:17" (1/1) ... [2022-10-16 05:35:17,562 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:35:17" (1/1) ... [2022-10-16 05:35:17,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:35:17" (1/1) ... [2022-10-16 05:35:17,580 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:35:17" (1/1) ... [2022-10-16 05:35:17,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:35:17" (1/1) ... [2022-10-16 05:35:17,597 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:35:17" (1/1) ... [2022-10-16 05:35:17,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:35:17" (1/1) ... [2022-10-16 05:35:17,602 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-16 05:35:17,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-16 05:35:17,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-16 05:35:17,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-16 05:35:17,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:35:17" (1/1) ... [2022-10-16 05:35:17,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 05:35:17,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:35:17,653 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-16 05:35:17,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-16 05:35:17,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-16 05:35:17,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-16 05:35:17,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-16 05:35:17,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-16 05:35:17,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-16 05:35:17,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-16 05:35:17,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-16 05:35:17,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-16 05:35:17,792 INFO L235 CfgBuilder]: Building ICFG [2022-10-16 05:35:17,794 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-16 05:35:18,176 INFO L276 CfgBuilder]: Performing block encoding [2022-10-16 05:35:18,189 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-16 05:35:18,192 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-16 05:35:18,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:35:18 BoogieIcfgContainer [2022-10-16 05:35:18,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-16 05:35:18,203 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-16 05:35:18,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-16 05:35:18,207 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-16 05:35:18,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 05:35:17" (1/3) ... [2022-10-16 05:35:18,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@153a048 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:35:18, skipping insertion in model container [2022-10-16 05:35:18,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:35:17" (2/3) ... [2022-10-16 05:35:18,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@153a048 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:35:18, skipping insertion in model container [2022-10-16 05:35:18,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:35:18" (3/3) ... [2022-10-16 05:35:18,213 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_strcpy_original-2.i [2022-10-16 05:35:18,241 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-16 05:35:18,241 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-10-16 05:35:18,391 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-16 05:35:18,416 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;@2060ee68, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-16 05:35:18,417 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2022-10-16 05:35:18,422 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 44 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) [2022-10-16 05:35:18,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 05:35:18,446 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:35:18,447 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 05:35:18,449 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-10-16 05:35:18,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:35:18,460 INFO L85 PathProgramCache]: Analyzing trace with hash 925797, now seen corresponding path program 1 times [2022-10-16 05:35:18,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:35:18,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077450682] [2022-10-16 05:35:18,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:35:18,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:35:18,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:35:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:35:18,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:35:18,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077450682] [2022-10-16 05:35:18,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077450682] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:35:18,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:35:18,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:35:18,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311401292] [2022-10-16 05:35:18,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:35:18,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:35:18,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:35:18,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:35:18,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:35:18,892 INFO L87 Difference]: Start difference. First operand has 45 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 44 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) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:18,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:35:18,998 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-10-16 05:35:19,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:35:19,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-16 05:35:19,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:35:19,015 INFO L225 Difference]: With dead ends: 40 [2022-10-16 05:35:19,015 INFO L226 Difference]: Without dead ends: 38 [2022-10-16 05:35:19,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:35:19,023 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:35:19,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 30 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:35:19,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-10-16 05:35:19,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-10-16 05:35:19,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 37 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) [2022-10-16 05:35:19,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-10-16 05:35:19,072 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 4 [2022-10-16 05:35:19,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:35:19,072 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-10-16 05:35:19,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:19,074 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-10-16 05:35:19,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 05:35:19,074 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:35:19,075 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 05:35:19,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-16 05:35:19,076 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-10-16 05:35:19,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:35:19,077 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2022-10-16 05:35:19,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:35:19,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379346014] [2022-10-16 05:35:19,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:35:19,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:35:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:35:19,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:35:19,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:35:19,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379346014] [2022-10-16 05:35:19,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379346014] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:35:19,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:35:19,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:35:19,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879213241] [2022-10-16 05:35:19,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:35:19,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:35:19,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:35:19,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:35:19,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:35:19,339 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:19,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:35:19,384 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2022-10-16 05:35:19,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:35:19,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-16 05:35:19,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:35:19,386 INFO L225 Difference]: With dead ends: 41 [2022-10-16 05:35:19,386 INFO L226 Difference]: Without dead ends: 41 [2022-10-16 05:35:19,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:35:19,388 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:35:19,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 61 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:35:19,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-10-16 05:35:19,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-10-16 05:35:19,395 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) [2022-10-16 05:35:19,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-10-16 05:35:19,396 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 4 [2022-10-16 05:35:19,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:35:19,397 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-10-16 05:35:19,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:19,397 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-10-16 05:35:19,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-16 05:35:19,398 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:35:19,398 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-10-16 05:35:19,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-16 05:35:19,399 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-10-16 05:35:19,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:35:19,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1810599630, now seen corresponding path program 1 times [2022-10-16 05:35:19,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:35:19,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324512724] [2022-10-16 05:35:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:35:19,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:35:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:35:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:35:19,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:35:19,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324512724] [2022-10-16 05:35:19,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324512724] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:35:19,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693406541] [2022-10-16 05:35:19,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:35:19,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:35:19,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:35:19,631 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:35:19,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-16 05:35:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:35:19,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-16 05:35:19,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:35:19,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 05:35:19,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-16 05:35:19,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 05:35:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:35:19,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:35:19,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:35:19,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693406541] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:35:19,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:35:19,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-10-16 05:35:19,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850414260] [2022-10-16 05:35:19,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:35:19,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 05:35:19,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:35:19,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 05:35:19,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-16 05:35:19,967 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:20,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:35:20,151 INFO L93 Difference]: Finished difference Result 109 states and 123 transitions. [2022-10-16 05:35:20,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 05:35:20,152 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-16 05:35:20,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:35:20,154 INFO L225 Difference]: With dead ends: 109 [2022-10-16 05:35:20,154 INFO L226 Difference]: Without dead ends: 109 [2022-10-16 05:35:20,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-10-16 05:35:20,156 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 108 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:35:20,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 112 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:35:20,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-10-16 05:35:20,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 49. [2022-10-16 05:35:20,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:20,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-10-16 05:35:20,166 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 7 [2022-10-16 05:35:20,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:35:20,167 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-10-16 05:35:20,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:20,167 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-10-16 05:35:20,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-16 05:35:20,168 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:35:20,168 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-16 05:35:20,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-16 05:35:20,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:35:20,382 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-10-16 05:35:20,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:35:20,384 INFO L85 PathProgramCache]: Analyzing trace with hash -65954221, now seen corresponding path program 1 times [2022-10-16 05:35:20,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:35:20,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942958063] [2022-10-16 05:35:20,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:35:20,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:35:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:35:20,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 05:35:20,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:35:20,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942958063] [2022-10-16 05:35:20,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942958063] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:35:20,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109503740] [2022-10-16 05:35:20,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:35:20,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:35:20,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:35:20,526 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:35:20,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-16 05:35:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:35:20,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-16 05:35:20,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:35:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:35:20,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:35:20,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:35:20,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109503740] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:35:20,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:35:20,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2022-10-16 05:35:20,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129190538] [2022-10-16 05:35:20,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:35:20,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-16 05:35:20,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:35:20,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-16 05:35:20,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2022-10-16 05:35:20,708 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:20,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:35:20,915 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2022-10-16 05:35:20,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-16 05:35:20,916 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-10-16 05:35:20,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:35:20,921 INFO L225 Difference]: With dead ends: 81 [2022-10-16 05:35:20,921 INFO L226 Difference]: Without dead ends: 81 [2022-10-16 05:35:20,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-10-16 05:35:20,927 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 42 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:35:20,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 134 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:35:20,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-10-16 05:35:20,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 68. [2022-10-16 05:35:20,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 57 states have (on average 1.3859649122807018) internal successors, (79), 67 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:20,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2022-10-16 05:35:20,947 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 12 [2022-10-16 05:35:20,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:35:20,948 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2022-10-16 05:35:20,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:20,949 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2022-10-16 05:35:20,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-16 05:35:20,950 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:35:20,950 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1] [2022-10-16 05:35:20,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-16 05:35:21,163 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 [2022-10-16 05:35:21,164 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-10-16 05:35:21,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:35:21,166 INFO L85 PathProgramCache]: Analyzing trace with hash -278008218, now seen corresponding path program 2 times [2022-10-16 05:35:21,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:35:21,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855531346] [2022-10-16 05:35:21,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:35:21,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:35:21,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:35:21,468 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:35:21,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:35:21,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855531346] [2022-10-16 05:35:21,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855531346] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:35:21,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132829487] [2022-10-16 05:35:21,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:35:21,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:35:21,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:35:21,471 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:35:21,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-16 05:35:21,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:35:21,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:35:21,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-16 05:35:21,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:35:21,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 05:35:21,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-16 05:35:21,564 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 05:35:21,736 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:35:21,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:35:21,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132829487] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:35:21,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:35:21,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2022-10-16 05:35:21,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527670533] [2022-10-16 05:35:21,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:35:21,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 05:35:21,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:35:21,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 05:35:21,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-10-16 05:35:21,740 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:21,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:35:21,824 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2022-10-16 05:35:21,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 05:35:21,825 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-10-16 05:35:21,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:35:21,826 INFO L225 Difference]: With dead ends: 67 [2022-10-16 05:35:21,826 INFO L226 Difference]: Without dead ends: 67 [2022-10-16 05:35:21,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-10-16 05:35:21,827 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 70 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:35:21,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 50 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:35:21,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-10-16 05:35:21,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-10-16 05:35:21,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 66 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:21,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2022-10-16 05:35:21,833 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 16 [2022-10-16 05:35:21,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:35:21,834 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2022-10-16 05:35:21,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:21,834 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2022-10-16 05:35:21,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-16 05:35:21,835 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:35:21,835 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:35:21,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-16 05:35:22,048 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 [2022-10-16 05:35:22,049 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-10-16 05:35:22,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:35:22,050 INFO L85 PathProgramCache]: Analyzing trace with hash -895712166, now seen corresponding path program 1 times [2022-10-16 05:35:22,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:35:22,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799968469] [2022-10-16 05:35:22,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:35:22,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:35:22,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:35:22,101 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-10-16 05:35:22,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:35:22,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799968469] [2022-10-16 05:35:22,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799968469] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:35:22,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:35:22,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-16 05:35:22,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989404967] [2022-10-16 05:35:22,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:35:22,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:35:22,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:35:22,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:35:22,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:35:22,104 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:22,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:35:22,120 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2022-10-16 05:35:22,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:35:22,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 26 [2022-10-16 05:35:22,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:35:22,122 INFO L225 Difference]: With dead ends: 69 [2022-10-16 05:35:22,122 INFO L226 Difference]: Without dead ends: 69 [2022-10-16 05:35:22,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:35:22,127 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:35:22,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:35:22,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-10-16 05:35:22,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-10-16 05:35:22,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 59 states have (on average 1.3389830508474576) internal successors, (79), 68 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:22,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2022-10-16 05:35:22,137 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 26 [2022-10-16 05:35:22,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:35:22,138 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2022-10-16 05:35:22,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:22,138 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2022-10-16 05:35:22,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-16 05:35:22,140 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:35:22,140 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:35:22,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-16 05:35:22,141 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-10-16 05:35:22,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:35:22,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1968137667, now seen corresponding path program 1 times [2022-10-16 05:35:22,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:35:22,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36972271] [2022-10-16 05:35:22,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:35:22,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:35:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:35:22,237 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-10-16 05:35:22,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:35:22,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36972271] [2022-10-16 05:35:22,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36972271] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:35:22,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:35:22,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:35:22,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705551588] [2022-10-16 05:35:22,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:35:22,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:35:22,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:35:22,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:35:22,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:35:22,241 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:22,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:35:22,256 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2022-10-16 05:35:22,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:35:22,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 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 28 [2022-10-16 05:35:22,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:35:22,257 INFO L225 Difference]: With dead ends: 67 [2022-10-16 05:35:22,258 INFO L226 Difference]: Without dead ends: 67 [2022-10-16 05:35:22,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:35:22,259 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:35:22,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 29 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:35:22,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-10-16 05:35:22,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-10-16 05:35:22,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 59 states have (on average 1.2881355932203389) internal successors, (76), 66 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:22,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2022-10-16 05:35:22,277 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 28 [2022-10-16 05:35:22,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:35:22,278 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2022-10-16 05:35:22,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:22,280 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2022-10-16 05:35:22,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-16 05:35:22,286 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:35:22,286 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:35:22,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-16 05:35:22,287 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-10-16 05:35:22,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:35:22,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1968137666, now seen corresponding path program 1 times [2022-10-16 05:35:22,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:35:22,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158648198] [2022-10-16 05:35:22,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:35:22,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:35:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:35:22,477 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:35:22,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:35:22,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158648198] [2022-10-16 05:35:22,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158648198] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:35:22,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503149349] [2022-10-16 05:35:22,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:35:22,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:35:22,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:35:22,480 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:35:22,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-16 05:35:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:35:22,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-16 05:35:22,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:35:22,587 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:35:22,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:35:22,688 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:35:22,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503149349] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:35:22,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:35:22,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-10-16 05:35:22,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198982313] [2022-10-16 05:35:22,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:35:22,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-16 05:35:22,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:35:22,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-16 05:35:22,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-16 05:35:22,692 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:22,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:35:22,757 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2022-10-16 05:35:22,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-16 05:35:22,758 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 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 28 [2022-10-16 05:35:22,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:35:22,759 INFO L225 Difference]: With dead ends: 91 [2022-10-16 05:35:22,759 INFO L226 Difference]: Without dead ends: 91 [2022-10-16 05:35:22,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-16 05:35:22,760 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:35:22,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 240 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:35:22,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-10-16 05:35:22,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-10-16 05:35:22,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 83 states have (on average 1.2048192771084338) internal successors, (100), 90 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:22,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2022-10-16 05:35:22,765 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 28 [2022-10-16 05:35:22,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:35:22,766 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2022-10-16 05:35:22,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:22,766 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2022-10-16 05:35:22,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-10-16 05:35:22,768 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:35:22,768 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:35:22,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-16 05:35:22,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:35:22,983 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-10-16 05:35:22,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:35:22,984 INFO L85 PathProgramCache]: Analyzing trace with hash -485018050, now seen corresponding path program 2 times [2022-10-16 05:35:22,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:35:22,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290252305] [2022-10-16 05:35:22,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:35:22,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:35:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:35:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:35:23,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:35:23,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290252305] [2022-10-16 05:35:23,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290252305] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:35:23,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583322838] [2022-10-16 05:35:23,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:35:23,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:35:23,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:35:23,416 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:35:23,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-16 05:35:23,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-16 05:35:23,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:35:23,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-16 05:35:23,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:35:23,522 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 05:35:23,523 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-16 05:35:23,853 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-10-16 05:35:23,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:35:23,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583322838] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:35:23,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:35:23,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [17] total 18 [2022-10-16 05:35:23,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413121164] [2022-10-16 05:35:23,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:35:23,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:35:23,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:35:23,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:35:23,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-10-16 05:35:23,858 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:23,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:35:23,897 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2022-10-16 05:35:23,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:35:23,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 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 52 [2022-10-16 05:35:23,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:35:23,902 INFO L225 Difference]: With dead ends: 99 [2022-10-16 05:35:23,902 INFO L226 Difference]: Without dead ends: 99 [2022-10-16 05:35:23,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-10-16 05:35:23,906 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 16 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:35:23,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 42 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:35:23,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-10-16 05:35:23,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2022-10-16 05:35:23,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 91 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:23,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2022-10-16 05:35:23,913 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 52 [2022-10-16 05:35:23,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:35:23,914 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2022-10-16 05:35:23,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:23,914 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2022-10-16 05:35:23,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-10-16 05:35:23,916 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:35:23,916 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:35:23,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-16 05:35:24,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:35:24,118 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-10-16 05:35:24,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:35:24,119 INFO L85 PathProgramCache]: Analyzing trace with hash -421881985, now seen corresponding path program 1 times [2022-10-16 05:35:24,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:35:24,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422023797] [2022-10-16 05:35:24,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:35:24,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:35:24,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:35:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-10-16 05:35:24,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:35:24,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422023797] [2022-10-16 05:35:24,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422023797] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:35:24,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:35:24,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 05:35:24,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219068000] [2022-10-16 05:35:24,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:35:24,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 05:35:24,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:35:24,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 05:35:24,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 05:35:24,267 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:24,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:35:24,310 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2022-10-16 05:35:24,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 05:35:24,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 54 [2022-10-16 05:35:24,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:35:24,312 INFO L225 Difference]: With dead ends: 110 [2022-10-16 05:35:24,312 INFO L226 Difference]: Without dead ends: 110 [2022-10-16 05:35:24,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-16 05:35:24,313 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 30 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:35:24,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 61 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:35:24,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-10-16 05:35:24,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 91. [2022-10-16 05:35:24,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 83 states have (on average 1.180722891566265) internal successors, (98), 90 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:24,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2022-10-16 05:35:24,322 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 54 [2022-10-16 05:35:24,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:35:24,323 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2022-10-16 05:35:24,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:24,323 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2022-10-16 05:35:24,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-10-16 05:35:24,329 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:35:24,329 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:35:24,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-16 05:35:24,329 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-10-16 05:35:24,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:35:24,331 INFO L85 PathProgramCache]: Analyzing trace with hash 602145762, now seen corresponding path program 1 times [2022-10-16 05:35:24,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:35:24,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832952778] [2022-10-16 05:35:24,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:35:24,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:35:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:35:24,499 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-10-16 05:35:24,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:35:24,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832952778] [2022-10-16 05:35:24,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832952778] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:35:24,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:35:24,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 05:35:24,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666253388] [2022-10-16 05:35:24,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:35:24,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 05:35:24,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:35:24,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 05:35:24,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 05:35:24,504 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:24,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:35:24,551 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2022-10-16 05:35:24,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 05:35:24,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 56 [2022-10-16 05:35:24,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:35:24,554 INFO L225 Difference]: With dead ends: 110 [2022-10-16 05:35:24,554 INFO L226 Difference]: Without dead ends: 110 [2022-10-16 05:35:24,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-16 05:35:24,555 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:35:24,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 62 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:35:24,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-10-16 05:35:24,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 93. [2022-10-16 05:35:24,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 85 states have (on average 1.1647058823529413) internal successors, (99), 92 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:24,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2022-10-16 05:35:24,559 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 56 [2022-10-16 05:35:24,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:35:24,561 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2022-10-16 05:35:24,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:24,561 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2022-10-16 05:35:24,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-10-16 05:35:24,565 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:35:24,566 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:35:24,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-16 05:35:24,566 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-10-16 05:35:24,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:35:24,567 INFO L85 PathProgramCache]: Analyzing trace with hash 2079198793, now seen corresponding path program 1 times [2022-10-16 05:35:24,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:35:24,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57774180] [2022-10-16 05:35:24,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:35:24,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:35:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:35:25,010 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-16 05:35:25,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:35:25,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57774180] [2022-10-16 05:35:25,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57774180] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:35:25,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823218351] [2022-10-16 05:35:25,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:35:25,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:35:25,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:35:25,014 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:35:25,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-16 05:35:25,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:35:25,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-16 05:35:25,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:35:25,209 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-16 05:35:25,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:35:25,630 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-16 05:35:25,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823218351] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:35:25,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:35:25,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-10-16 05:35:25,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574967609] [2022-10-16 05:35:25,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:35:25,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-10-16 05:35:25,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:35:25,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-10-16 05:35:25,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-16 05:35:25,634 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 33 states, 33 states have (on average 3.090909090909091) internal successors, (102), 33 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:25,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:35:25,774 INFO L93 Difference]: Finished difference Result 141 states and 147 transitions. [2022-10-16 05:35:25,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-10-16 05:35:25,775 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.090909090909091) internal successors, (102), 33 states have internal predecessors, (102), 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 56 [2022-10-16 05:35:25,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:35:25,776 INFO L225 Difference]: With dead ends: 141 [2022-10-16 05:35:25,776 INFO L226 Difference]: Without dead ends: 141 [2022-10-16 05:35:25,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-16 05:35:25,778 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 60 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:35:25,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 172 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:35:25,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-10-16 05:35:25,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-10-16 05:35:25,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 133 states have (on average 1.105263157894737) internal successors, (147), 140 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:25,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 147 transitions. [2022-10-16 05:35:25,782 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 147 transitions. Word has length 56 [2022-10-16 05:35:25,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:35:25,783 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 147 transitions. [2022-10-16 05:35:25,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.090909090909091) internal successors, (102), 33 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:25,783 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 147 transitions. [2022-10-16 05:35:25,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-10-16 05:35:25,784 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:35:25,785 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:35:25,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-16 05:35:25,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:35:26,000 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-10-16 05:35:26,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:35:26,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1680033353, now seen corresponding path program 2 times [2022-10-16 05:35:26,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:35:26,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159943597] [2022-10-16 05:35:26,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:35:26,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:35:26,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:35:27,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-16 05:35:27,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:35:27,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159943597] [2022-10-16 05:35:27,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159943597] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:35:27,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834416903] [2022-10-16 05:35:27,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:35:27,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:35:27,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:35:27,431 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:35:27,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-16 05:35:27,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:35:27,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:35:27,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-16 05:35:27,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:35:27,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-16 05:35:27,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:35:29,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-16 05:35:29,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834416903] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:35:29,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:35:29,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-10-16 05:35:29,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590184881] [2022-10-16 05:35:29,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:35:29,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-10-16 05:35:29,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:35:29,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-10-16 05:35:29,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-16 05:35:29,036 INFO L87 Difference]: Start difference. First operand 141 states and 147 transitions. Second operand has 65 states, 65 states have (on average 3.046153846153846) internal successors, (198), 65 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:29,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:35:29,348 INFO L93 Difference]: Finished difference Result 237 states and 243 transitions. [2022-10-16 05:35:29,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-10-16 05:35:29,349 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.046153846153846) internal successors, (198), 65 states have internal predecessors, (198), 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 104 [2022-10-16 05:35:29,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:35:29,351 INFO L225 Difference]: With dead ends: 237 [2022-10-16 05:35:29,351 INFO L226 Difference]: Without dead ends: 237 [2022-10-16 05:35:29,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-16 05:35:29,354 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 124 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 05:35:29,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 172 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 05:35:29,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-10-16 05:35:29,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2022-10-16 05:35:29,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 229 states have (on average 1.0611353711790392) internal successors, (243), 236 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:29,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 243 transitions. [2022-10-16 05:35:29,361 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 243 transitions. Word has length 104 [2022-10-16 05:35:29,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:35:29,361 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 243 transitions. [2022-10-16 05:35:29,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.046153846153846) internal successors, (198), 65 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:29,362 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 243 transitions. [2022-10-16 05:35:29,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-10-16 05:35:29,370 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:35:29,370 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:35:29,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-16 05:35:29,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:35:29,585 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-10-16 05:35:29,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:35:29,586 INFO L85 PathProgramCache]: Analyzing trace with hash 127776329, now seen corresponding path program 3 times [2022-10-16 05:35:29,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:35:29,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562458568] [2022-10-16 05:35:29,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:35:29,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:35:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:35:33,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5738 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-16 05:35:33,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:35:33,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562458568] [2022-10-16 05:35:33,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562458568] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:35:33,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467253143] [2022-10-16 05:35:33,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 05:35:33,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:35:33,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:35:33,917 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:35:33,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-16 05:35:34,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-16 05:35:34,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:35:34,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-16 05:35:34,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:35:34,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 05:35:34,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-16 05:35:34,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 05:35:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5738 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5735 trivial. 0 not checked. [2022-10-16 05:35:35,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:35:35,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467253143] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:35:35,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:35:35,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [65] total 69 [2022-10-16 05:35:35,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065649144] [2022-10-16 05:35:35,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:35:35,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-16 05:35:35,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:35:35,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-16 05:35:35,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2093, Invalid=2599, Unknown=0, NotChecked=0, Total=4692 [2022-10-16 05:35:35,462 INFO L87 Difference]: Start difference. First operand 237 states and 243 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:35,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:35:35,616 INFO L93 Difference]: Finished difference Result 249 states and 258 transitions. [2022-10-16 05:35:35,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 05:35:35,617 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 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 200 [2022-10-16 05:35:35,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:35:35,618 INFO L225 Difference]: With dead ends: 249 [2022-10-16 05:35:35,619 INFO L226 Difference]: Without dead ends: 249 [2022-10-16 05:35:35,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2099, Invalid=2731, Unknown=0, NotChecked=0, Total=4830 [2022-10-16 05:35:35,622 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 46 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:35:35,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 82 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:35:35,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-10-16 05:35:35,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 235. [2022-10-16 05:35:35,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 229 states have (on average 1.0524017467248907) internal successors, (241), 234 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:35,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 241 transitions. [2022-10-16 05:35:35,629 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 241 transitions. Word has length 200 [2022-10-16 05:35:35,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:35:35,629 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 241 transitions. [2022-10-16 05:35:35,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:35,630 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 241 transitions. [2022-10-16 05:35:35,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-10-16 05:35:35,633 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:35:35,633 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:35:35,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-16 05:35:35,833 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,SelfDestructingSolverStorable13 [2022-10-16 05:35:35,834 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-10-16 05:35:35,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:35:35,835 INFO L85 PathProgramCache]: Analyzing trace with hash 244241061, now seen corresponding path program 1 times [2022-10-16 05:35:35,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:35:35,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067209001] [2022-10-16 05:35:35,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:35:35,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:35:35,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:35:39,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:35:39,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:35:39,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067209001] [2022-10-16 05:35:39,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067209001] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:35:39,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959573296] [2022-10-16 05:35:39,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:35:39,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:35:39,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:35:39,737 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:35:39,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-16 05:35:39,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:35:39,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 64 conjunts are in the unsatisfiable core [2022-10-16 05:35:39,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:35:40,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:35:40,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:35:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:35:45,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959573296] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:35:45,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:35:45,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 129 [2022-10-16 05:35:45,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796046139] [2022-10-16 05:35:45,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:35:45,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-10-16 05:35:45,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:35:45,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-10-16 05:35:45,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2022-10-16 05:35:45,849 INFO L87 Difference]: Start difference. First operand 235 states and 241 transitions. Second operand has 129 states, 129 states have (on average 3.054263565891473) internal successors, (394), 129 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:46,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:35:46,645 INFO L93 Difference]: Finished difference Result 427 states and 433 transitions. [2022-10-16 05:35:46,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-10-16 05:35:46,646 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 3.054263565891473) internal successors, (394), 129 states have internal predecessors, (394), 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 202 [2022-10-16 05:35:46,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:35:46,649 INFO L225 Difference]: With dead ends: 427 [2022-10-16 05:35:46,649 INFO L226 Difference]: Without dead ends: 427 [2022-10-16 05:35:46,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2022-10-16 05:35:46,658 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 378 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-16 05:35:46,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 226 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-16 05:35:46,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-10-16 05:35:46,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 427. [2022-10-16 05:35:46,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 421 states have (on average 1.0285035629453683) internal successors, (433), 426 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:46,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 433 transitions. [2022-10-16 05:35:46,667 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 433 transitions. Word has length 202 [2022-10-16 05:35:46,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:35:46,668 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 433 transitions. [2022-10-16 05:35:46,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 3.054263565891473) internal successors, (394), 129 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:35:46,669 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 433 transitions. [2022-10-16 05:35:46,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2022-10-16 05:35:46,675 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:35:46,675 INFO L195 NwaCegarLoop]: trace histogram [126, 126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:35:46,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-16 05:35:46,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-10-16 05:35:46,890 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-10-16 05:35:46,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:35:46,891 INFO L85 PathProgramCache]: Analyzing trace with hash 671855269, now seen corresponding path program 2 times [2022-10-16 05:35:46,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:35:46,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770576428] [2022-10-16 05:35:46,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:35:46,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:35:47,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:36:00,902 INFO L134 CoverageAnalysis]: Checked inductivity of 23751 backedges. 0 proven. 23751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:36:00,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:36:00,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770576428] [2022-10-16 05:36:00,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770576428] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:36:00,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355258588] [2022-10-16 05:36:00,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:36:00,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:36:00,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:36:00,905 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:36:00,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-16 05:36:01,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-16 05:36:01,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:36:01,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-16 05:36:01,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:36:04,006 INFO L134 CoverageAnalysis]: Checked inductivity of 23751 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23751 trivial. 0 not checked. [2022-10-16 05:36:04,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:36:04,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355258588] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:36:04,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:36:04,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [129] total 131 [2022-10-16 05:36:04,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182673558] [2022-10-16 05:36:04,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:36:04,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 05:36:04,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:36:04,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 05:36:04,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8260, Invalid=8770, Unknown=0, NotChecked=0, Total=17030 [2022-10-16 05:36:04,013 INFO L87 Difference]: Start difference. First operand 427 states and 433 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:36:04,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:36:04,017 INFO L93 Difference]: Finished difference Result 429 states and 434 transitions. [2022-10-16 05:36:04,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 05:36:04,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 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 394 [2022-10-16 05:36:04,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:36:04,020 INFO L225 Difference]: With dead ends: 429 [2022-10-16 05:36:04,020 INFO L226 Difference]: Without dead ends: 427 [2022-10-16 05:36:04,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=8260, Invalid=8770, Unknown=0, NotChecked=0, Total=17030 [2022-10-16 05:36:04,023 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:36:04,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 76 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-10-16 05:36:04,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-10-16 05:36:04,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 427. [2022-10-16 05:36:04,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 421 states have (on average 1.0261282660332542) internal successors, (432), 426 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:36:04,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 432 transitions. [2022-10-16 05:36:04,033 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 432 transitions. Word has length 394 [2022-10-16 05:36:04,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:36:04,034 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 432 transitions. [2022-10-16 05:36:04,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:36:04,035 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 432 transitions. [2022-10-16 05:36:04,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2022-10-16 05:36:04,041 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:36:04,042 INFO L195 NwaCegarLoop]: trace histogram [126, 126, 126, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-16 05:36:04,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-16 05:36:04,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-10-16 05:36:04,243 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-10-16 05:36:04,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:36:04,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1483876044, now seen corresponding path program 1 times [2022-10-16 05:36:04,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:36:04,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691999329] [2022-10-16 05:36:04,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:36:04,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:36:04,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:36:17,049 INFO L134 CoverageAnalysis]: Checked inductivity of 23758 backedges. 0 proven. 23751 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-16 05:36:17,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:36:17,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691999329] [2022-10-16 05:36:17,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691999329] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:36:17,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764616394] [2022-10-16 05:36:17,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:36:17,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:36:17,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:36:17,056 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:36:17,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-16 05:36:17,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:36:17,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 1732 conjuncts, 128 conjunts are in the unsatisfiable core [2022-10-16 05:36:17,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:36:17,954 INFO L134 CoverageAnalysis]: Checked inductivity of 23758 backedges. 0 proven. 23751 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-16 05:36:17,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:36:39,123 INFO L134 CoverageAnalysis]: Checked inductivity of 23758 backedges. 0 proven. 23751 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-16 05:36:39,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764616394] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:36:39,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:36:39,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129, 129] total 257 [2022-10-16 05:36:39,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624477969] [2022-10-16 05:36:39,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:36:39,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 257 states [2022-10-16 05:36:39,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:36:39,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 257 interpolants. [2022-10-16 05:36:39,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32896, Invalid=32896, Unknown=0, NotChecked=0, Total=65792 [2022-10-16 05:36:39,143 INFO L87 Difference]: Start difference. First operand 427 states and 432 transitions. Second operand has 257 states, 257 states have (on average 3.0116731517509727) internal successors, (774), 257 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:36:42,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:36:42,022 INFO L93 Difference]: Finished difference Result 811 states and 816 transitions. [2022-10-16 05:36:42,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2022-10-16 05:36:42,023 INFO L78 Accepts]: Start accepts. Automaton has has 257 states, 257 states have (on average 3.0116731517509727) internal successors, (774), 257 states have internal predecessors, (774), 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 396 [2022-10-16 05:36:42,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:36:42,027 INFO L225 Difference]: With dead ends: 811 [2022-10-16 05:36:42,028 INFO L226 Difference]: Without dead ends: 811 [2022-10-16 05:36:42,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 919 GetRequests, 664 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 27.5s TimeCoverageRelationStatistics Valid=32896, Invalid=32896, Unknown=0, NotChecked=0, Total=65792 [2022-10-16 05:36:42,035 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 762 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-16 05:36:42,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [762 Valid, 226 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-16 05:36:42,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-10-16 05:36:42,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 811. [2022-10-16 05:36:42,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 805 states have (on average 1.013664596273292) internal successors, (816), 810 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:36:42,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 816 transitions. [2022-10-16 05:36:42,050 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 816 transitions. Word has length 396 [2022-10-16 05:36:42,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:36:42,051 INFO L495 AbstractCegarLoop]: Abstraction has 811 states and 816 transitions. [2022-10-16 05:36:42,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 257 states, 257 states have (on average 3.0116731517509727) internal successors, (774), 257 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:36:42,052 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 816 transitions. [2022-10-16 05:36:42,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 781 [2022-10-16 05:36:42,076 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:36:42,076 INFO L195 NwaCegarLoop]: trace histogram [254, 254, 254, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-16 05:36:42,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-10-16 05:36:42,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-10-16 05:36:42,290 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-10-16 05:36:42,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:36:42,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1273521868, now seen corresponding path program 2 times [2022-10-16 05:36:42,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:36:42,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561666078] [2022-10-16 05:36:42,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:36:42,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:36:43,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:37:40,318 INFO L134 CoverageAnalysis]: Checked inductivity of 96654 backedges. 0 proven. 96647 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-16 05:37:40,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:37:40,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561666078] [2022-10-16 05:37:40,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561666078] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:37:40,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895026228] [2022-10-16 05:37:40,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:37:40,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:37:40,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:37:40,320 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:37:40,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-16 05:37:40,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-16 05:37:40,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:37:40,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-16 05:37:40,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:37:40,673 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 05:37:40,673 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-16 05:37:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 96654 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 96648 trivial. 0 not checked. [2022-10-16 05:37:45,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:37:57,126 INFO L134 CoverageAnalysis]: Checked inductivity of 96654 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 96648 trivial. 0 not checked. [2022-10-16 05:37:57,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895026228] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:37:57,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:37:57,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [257, 5, 5] total 265 [2022-10-16 05:37:57,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759042768] [2022-10-16 05:37:57,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:37:57,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 265 states [2022-10-16 05:37:57,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:37:57,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 265 interpolants. [2022-10-16 05:37:57,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32926, Invalid=37034, Unknown=0, NotChecked=0, Total=69960 [2022-10-16 05:37:57,143 INFO L87 Difference]: Start difference. First operand 811 states and 816 transitions. Second operand has 265 states, 265 states have (on average 3.0716981132075474) internal successors, (814), 265 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:38:51,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:38:51,768 INFO L93 Difference]: Finished difference Result 829 states and 835 transitions. [2022-10-16 05:38:51,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 263 states. [2022-10-16 05:38:51,769 INFO L78 Accepts]: Start accepts. Automaton has has 265 states, 265 states have (on average 3.0716981132075474) internal successors, (814), 265 states have internal predecessors, (814), 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 780 [2022-10-16 05:38:51,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:38:51,774 INFO L225 Difference]: With dead ends: 829 [2022-10-16 05:38:51,775 INFO L226 Difference]: Without dead ends: 829 [2022-10-16 05:38:51,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2074 GetRequests, 1552 SyntacticMatches, 0 SemanticMatches, 522 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35458 ImplicationChecksByTransitivity, 81.1s TimeCoverageRelationStatistics Valid=100794, Invalid=173258, Unknown=0, NotChecked=0, Total=274052 [2022-10-16 05:38:51,793 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 2162 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 783 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2162 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 783 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-10-16 05:38:51,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2162 Valid, 94 Invalid, 1675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [783 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-10-16 05:38:51,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-10-16 05:38:51,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 815. [2022-10-16 05:38:51,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 810 states have (on average 1.0148148148148148) internal successors, (822), 814 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:38:51,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 822 transitions. [2022-10-16 05:38:51,811 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 822 transitions. Word has length 780 [2022-10-16 05:38:51,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:38:51,812 INFO L495 AbstractCegarLoop]: Abstraction has 815 states and 822 transitions. [2022-10-16 05:38:51,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 265 states, 265 states have (on average 3.0716981132075474) internal successors, (814), 265 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:38:51,813 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 822 transitions. [2022-10-16 05:38:51,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2022-10-16 05:38:51,820 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:38:51,821 INFO L195 NwaCegarLoop]: trace histogram [255, 255, 255, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:38:51,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-10-16 05:38:52,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-10-16 05:38:52,036 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-10-16 05:38:52,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:38:52,037 INFO L85 PathProgramCache]: Analyzing trace with hash 73525306, now seen corresponding path program 1 times [2022-10-16 05:38:52,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:38:52,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381399999] [2022-10-16 05:38:52,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:38:52,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:38:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:38:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 97413 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 97410 trivial. 0 not checked. [2022-10-16 05:38:53,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:38:53,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381399999] [2022-10-16 05:38:53,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381399999] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:38:53,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310430919] [2022-10-16 05:38:53,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:38:53,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:38:53,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:38:53,356 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:38:53,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-10-16 05:38:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:38:54,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 3400 conjuncts, 257 conjunts are in the unsatisfiable core [2022-10-16 05:38:54,219 INFO L286 TraceCheckSpWp]: Computing forward predicates...