/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/loops/n.c24.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 18:19:11,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 18:19:11,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 18:19:11,526 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 18:19:11,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 18:19:11,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 18:19:11,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 18:19:11,553 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 18:19:11,556 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 18:19:11,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 18:19:11,567 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 18:19:11,570 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 18:19:11,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 18:19:11,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 18:19:11,577 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 18:19:11,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 18:19:11,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 18:19:11,589 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 18:19:11,591 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 18:19:11,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 18:19:11,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 18:19:11,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 18:19:11,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 18:19:11,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 18:19:11,617 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-15 18:19:11,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-15 18:19:11,623 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-15 18:19:11,624 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-15 18:19:11,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-15 18:19:11,626 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-15 18:19:11,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-15 18:19:11,628 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-15 18:19:11,628 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-15 18:19:11,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 18:19:11,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 18:19:11,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 18:19:11,632 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-15 18:19:11,663 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 18:19:11,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 18:19:11,664 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 18:19:11,664 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 18:19:11,665 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 18:19:11,666 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 18:19:11,667 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 18:19:11,667 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 18:19:11,667 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 18:19:11,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 18:19:11,668 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 18:19:11,668 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 18:19:11,668 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 18:19:11,669 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 18:19:11,669 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 18:19:11,669 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 18:19:11,669 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 18:19:11,670 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 18:19:11,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 18:19:11,670 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 18:19:11,670 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 18:19:11,670 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 18:19:11,671 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 18:19:11,671 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 18:19:11,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 18:19:11,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:19:11,672 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 18:19:11,672 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 18:19:11,672 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 18:19:11,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 18:19:11,673 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 18:19:12,086 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 18:19:12,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 18:19:12,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 18:19:12,142 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 18:19:12,143 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 18:19:12,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/n.c24.i [2022-10-15 18:19:12,223 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9bce2997/41c7f239303a4c82b6cdb234db66913d/FLAG10671a115 [2022-10-15 18:19:12,887 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 18:19:12,888 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/n.c24.i [2022-10-15 18:19:12,901 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9bce2997/41c7f239303a4c82b6cdb234db66913d/FLAG10671a115 [2022-10-15 18:19:13,197 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9bce2997/41c7f239303a4c82b6cdb234db66913d [2022-10-15 18:19:13,201 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 18:19:13,207 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 18:19:13,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 18:19:13,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 18:19:13,214 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 18:19:13,215 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:19:13" (1/1) ... [2022-10-15 18:19:13,216 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f885c20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:19:13, skipping insertion in model container [2022-10-15 18:19:13,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:19:13" (1/1) ... [2022-10-15 18:19:13,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 18:19:13,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 18:19:13,463 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/loops/n.c24.i[805,818] [2022-10-15 18:19:13,529 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:19:13,543 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 18:19:13,559 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/loops/n.c24.i[805,818] [2022-10-15 18:19:13,582 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:19:13,633 INFO L208 MainTranslator]: Completed translation [2022-10-15 18:19:13,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:19:13 WrapperNode [2022-10-15 18:19:13,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 18:19:13,637 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 18:19:13,637 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 18:19:13,638 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 18:19:13,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:19:13" (1/1) ... [2022-10-15 18:19:13,673 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:19:13" (1/1) ... [2022-10-15 18:19:13,707 INFO L138 Inliner]: procedures = 68, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 148 [2022-10-15 18:19:13,708 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 18:19:13,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 18:19:13,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 18:19:13,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 18:19:13,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:19:13" (1/1) ... [2022-10-15 18:19:13,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:19:13" (1/1) ... [2022-10-15 18:19:13,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:19:13" (1/1) ... [2022-10-15 18:19:13,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:19:13" (1/1) ... [2022-10-15 18:19:13,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:19:13" (1/1) ... [2022-10-15 18:19:13,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:19:13" (1/1) ... [2022-10-15 18:19:13,745 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:19:13" (1/1) ... [2022-10-15 18:19:13,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:19:13" (1/1) ... [2022-10-15 18:19:13,751 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 18:19:13,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 18:19:13,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 18:19:13,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 18:19:13,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:19:13" (1/1) ... [2022-10-15 18:19:13,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:19:13,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:19:13,797 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-15 18:19:13,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-15 18:19:13,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 18:19:13,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-10-15 18:19:13,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 18:19:13,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 18:19:13,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 18:19:13,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 18:19:13,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 18:19:13,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-10-15 18:19:13,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 18:19:13,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 18:19:13,970 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 18:19:13,973 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 18:19:14,537 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 18:19:14,547 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 18:19:14,548 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-10-15 18:19:14,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:19:14 BoogieIcfgContainer [2022-10-15 18:19:14,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 18:19:14,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 18:19:14,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 18:19:14,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 18:19:14,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 06:19:13" (1/3) ... [2022-10-15 18:19:14,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@201166e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:19:14, skipping insertion in model container [2022-10-15 18:19:14,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:19:13" (2/3) ... [2022-10-15 18:19:14,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@201166e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:19:14, skipping insertion in model container [2022-10-15 18:19:14,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:19:14" (3/3) ... [2022-10-15 18:19:14,563 INFO L112 eAbstractionObserver]: Analyzing ICFG n.c24.i [2022-10-15 18:19:14,589 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 18:19:14,589 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-10-15 18:19:14,658 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 18:19:14,669 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;@17995b32, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 18:19:14,669 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2022-10-15 18:19:14,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 47 states have (on average 1.872340425531915) internal successors, (88), 69 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:14,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:19:14,684 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:19:14,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:19:14,686 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 18:19:14,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:19:14,693 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-10-15 18:19:14,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:19:14,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254593689] [2022-10-15 18:19:14,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:14,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:19:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:14,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:14,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:19:14,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254593689] [2022-10-15 18:19:14,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254593689] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:19:14,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:19:14,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:19:14,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506374413] [2022-10-15 18:19:14,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:19:15,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:19:15,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:19:15,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:19:15,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:19:15,046 INFO L87 Difference]: Start difference. First operand has 70 states, 47 states have (on average 1.872340425531915) internal successors, (88), 69 states have internal predecessors, (88), 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) [2022-10-15 18:19:15,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:19:15,145 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2022-10-15 18:19:15,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:19:15,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 18:19:15,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:19:15,160 INFO L225 Difference]: With dead ends: 64 [2022-10-15 18:19:15,161 INFO L226 Difference]: Without dead ends: 62 [2022-10-15 18:19:15,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:19:15,169 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 67 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:19:15,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 50 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:19:15,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-10-15 18:19:15,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-10-15 18:19:15,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 46 states have (on average 1.6304347826086956) internal successors, (75), 61 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:15,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2022-10-15 18:19:15,219 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 4 [2022-10-15 18:19:15,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:19:15,220 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2022-10-15 18:19:15,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:15,221 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2022-10-15 18:19:15,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:19:15,222 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:19:15,222 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:19:15,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 18:19:15,223 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 18:19:15,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:19:15,224 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-10-15 18:19:15,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:19:15,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761721663] [2022-10-15 18:19:15,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:15,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:19:15,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:15,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:15,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:19:15,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761721663] [2022-10-15 18:19:15,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761721663] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:19:15,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:19:15,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:19:15,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223348498] [2022-10-15 18:19:15,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:19:15,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:19:15,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:19:15,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:19:15,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:19:15,447 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:15,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:19:15,587 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2022-10-15 18:19:15,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:19:15,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 18:19:15,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:19:15,593 INFO L225 Difference]: With dead ends: 66 [2022-10-15 18:19:15,594 INFO L226 Difference]: Without dead ends: 66 [2022-10-15 18:19:15,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:19:15,603 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 2 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:19:15,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 111 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:19:15,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-10-15 18:19:15,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-10-15 18:19:15,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 63 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) [2022-10-15 18:19:15,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-10-15 18:19:15,635 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 4 [2022-10-15 18:19:15,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:19:15,637 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-10-15 18:19:15,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:15,637 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-10-15 18:19:15,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-15 18:19:15,638 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:19:15,639 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-10-15 18:19:15,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 18:19:15,639 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 18:19:15,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:19:15,642 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2022-10-15 18:19:15,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:19:15,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232022384] [2022-10-15 18:19:15,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:15,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:19:15,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:15,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:19:15,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232022384] [2022-10-15 18:19:15,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232022384] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:19:15,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107476542] [2022-10-15 18:19:15,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:15,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:19:15,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:19:15,902 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:19:15,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-15 18:19:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:15,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-15 18:19:15,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:19:16,099 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-15 18:19:16,100 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 [2022-10-15 18:19:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:16,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:19:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:16,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107476542] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:19:16,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:19:16,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-10-15 18:19:16,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79931762] [2022-10-15 18:19:16,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:19:16,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-15 18:19:16,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:19:16,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-15 18:19:16,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-15 18:19:16,282 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:16,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:19:16,606 INFO L93 Difference]: Finished difference Result 106 states and 128 transitions. [2022-10-15 18:19:16,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 18:19:16,607 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-10-15 18:19:16,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:19:16,611 INFO L225 Difference]: With dead ends: 106 [2022-10-15 18:19:16,612 INFO L226 Difference]: Without dead ends: 106 [2022-10-15 18:19:16,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-10-15 18:19:16,619 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 59 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 18:19:16,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 291 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 18:19:16,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-10-15 18:19:16,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 97. [2022-10-15 18:19:16,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 81 states have (on average 1.5432098765432098) internal successors, (125), 96 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:16,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2022-10-15 18:19:16,643 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 8 [2022-10-15 18:19:16,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:19:16,644 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2022-10-15 18:19:16,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:16,644 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2022-10-15 18:19:16,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-15 18:19:16,646 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:19:16,646 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:19:16,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-15 18:19:16,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:19:16,860 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 18:19:16,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:19:16,860 INFO L85 PathProgramCache]: Analyzing trace with hash -169938485, now seen corresponding path program 1 times [2022-10-15 18:19:16,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:19:16,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304899435] [2022-10-15 18:19:16,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:16,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:19:16,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:16,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:16,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:19:16,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304899435] [2022-10-15 18:19:16,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304899435] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:19:16,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109236006] [2022-10-15 18:19:16,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:16,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:19:16,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:19:16,981 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:19:16,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-15 18:19:17,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:17,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-15 18:19:17,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:19:17,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:17,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:19:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:17,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109236006] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:19:17,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:19:17,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-10-15 18:19:17,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403907710] [2022-10-15 18:19:17,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:19:17,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 18:19:17,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:19:17,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 18:19:17,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-15 18:19:17,121 INFO L87 Difference]: Start difference. First operand 97 states and 125 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:17,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:19:17,290 INFO L93 Difference]: Finished difference Result 458 states and 603 transitions. [2022-10-15 18:19:17,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 18:19:17,291 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 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 15 [2022-10-15 18:19:17,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:19:17,294 INFO L225 Difference]: With dead ends: 458 [2022-10-15 18:19:17,294 INFO L226 Difference]: Without dead ends: 458 [2022-10-15 18:19:17,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-15 18:19:17,296 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 738 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:19:17,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [738 Valid, 335 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:19:17,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-10-15 18:19:17,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 380. [2022-10-15 18:19:17,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 364 states have (on average 1.64010989010989) internal successors, (597), 379 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:17,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 597 transitions. [2022-10-15 18:19:17,330 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 597 transitions. Word has length 15 [2022-10-15 18:19:17,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:19:17,331 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 597 transitions. [2022-10-15 18:19:17,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:17,332 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 597 transitions. [2022-10-15 18:19:17,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-15 18:19:17,333 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:19:17,333 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2022-10-15 18:19:17,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-15 18:19:17,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-10-15 18:19:17,547 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 18:19:17,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:19:17,548 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2022-10-15 18:19:17,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:19:17,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023998030] [2022-10-15 18:19:17,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:17,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:19:17,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:17,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:19:17,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023998030] [2022-10-15 18:19:17,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023998030] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:19:17,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084879983] [2022-10-15 18:19:17,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:19:17,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:19:17,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:19:17,984 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:19:18,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-15 18:19:18,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:19:18,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:19:18,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-15 18:19:18,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:19:18,114 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-15 18:19:18,115 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 [2022-10-15 18:19:18,411 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:18,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:19:18,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084879983] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:19:18,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:19:18,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2022-10-15 18:19:18,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976711445] [2022-10-15 18:19:18,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:19:18,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 18:19:18,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:19:18,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 18:19:18,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-10-15 18:19:18,415 INFO L87 Difference]: Start difference. First operand 380 states and 597 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:18,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:19:18,746 INFO L93 Difference]: Finished difference Result 414 states and 577 transitions. [2022-10-15 18:19:18,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 18:19:18,747 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-10-15 18:19:18,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:19:18,751 INFO L225 Difference]: With dead ends: 414 [2022-10-15 18:19:18,751 INFO L226 Difference]: Without dead ends: 414 [2022-10-15 18:19:18,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-10-15 18:19:18,758 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 337 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 18:19:18,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 353 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 18:19:18,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-10-15 18:19:18,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 336. [2022-10-15 18:19:18,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 322 states have (on average 1.5869565217391304) internal successors, (511), 335 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:18,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 511 transitions. [2022-10-15 18:19:18,798 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 511 transitions. Word has length 20 [2022-10-15 18:19:18,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:19:18,799 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 511 transitions. [2022-10-15 18:19:18,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:18,799 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 511 transitions. [2022-10-15 18:19:18,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-10-15 18:19:18,801 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:19:18,801 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:19:18,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-10-15 18:19:19,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:19:19,017 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 18:19:19,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:19:19,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1600162111, now seen corresponding path program 2 times [2022-10-15 18:19:19,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:19:19,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066795413] [2022-10-15 18:19:19,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:19,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:19:19,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:19,196 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:19,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:19:19,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066795413] [2022-10-15 18:19:19,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066795413] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:19:19,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187005635] [2022-10-15 18:19:19,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:19:19,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:19:19,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:19:19,199 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:19:19,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-15 18:19:19,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 18:19:19,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:19:19,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-15 18:19:19,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:19:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-10-15 18:19:19,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:19:19,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187005635] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:19:19,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:19:19,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2022-10-15 18:19:19,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433131504] [2022-10-15 18:19:19,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:19:19,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 18:19:19,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:19:19,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 18:19:19,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-10-15 18:19:19,689 INFO L87 Difference]: Start difference. First operand 336 states and 511 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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) [2022-10-15 18:19:19,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:19:19,706 INFO L93 Difference]: Finished difference Result 370 states and 561 transitions. [2022-10-15 18:19:19,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 18:19:19,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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 31 [2022-10-15 18:19:19,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:19:19,709 INFO L225 Difference]: With dead ends: 370 [2022-10-15 18:19:19,710 INFO L226 Difference]: Without dead ends: 369 [2022-10-15 18:19:19,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-10-15 18:19:19,711 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 9 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:19:19,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 156 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 47 Unchecked, 0.0s Time] [2022-10-15 18:19:19,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-10-15 18:19:19,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 364. [2022-10-15 18:19:19,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 350 states have (on average 1.5714285714285714) internal successors, (550), 363 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:19,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 550 transitions. [2022-10-15 18:19:19,723 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 550 transitions. Word has length 31 [2022-10-15 18:19:19,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:19:19,723 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 550 transitions. [2022-10-15 18:19:19,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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) [2022-10-15 18:19:19,724 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 550 transitions. [2022-10-15 18:19:19,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-10-15 18:19:19,725 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:19:19,725 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:19:19,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-15 18:19:19,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:19:19,941 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 18:19:19,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:19:19,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1934583963, now seen corresponding path program 1 times [2022-10-15 18:19:19,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:19:19,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745211664] [2022-10-15 18:19:19,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:19,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:19:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:20,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:19:20,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745211664] [2022-10-15 18:19:20,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745211664] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:19:20,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101436381] [2022-10-15 18:19:20,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:20,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:19:20,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:19:20,109 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:19:20,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-15 18:19:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:20,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 18:19:20,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:19:20,236 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:20,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:19:20,353 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:20,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101436381] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:19:20,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:19:20,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-10-15 18:19:20,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752113988] [2022-10-15 18:19:20,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:19:20,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-15 18:19:20,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:19:20,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-15 18:19:20,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-15 18:19:20,357 INFO L87 Difference]: Start difference. First operand 364 states and 550 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:20,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:19:20,692 INFO L93 Difference]: Finished difference Result 862 states and 1092 transitions. [2022-10-15 18:19:20,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-15 18:19:20,692 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 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 32 [2022-10-15 18:19:20,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:19:20,698 INFO L225 Difference]: With dead ends: 862 [2022-10-15 18:19:20,698 INFO L226 Difference]: Without dead ends: 862 [2022-10-15 18:19:20,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-15 18:19:20,699 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 2028 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2028 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:19:20,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2028 Valid, 749 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:19:20,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2022-10-15 18:19:20,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 708. [2022-10-15 18:19:20,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 694 states have (on average 1.553314121037464) internal successors, (1078), 707 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:20,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1078 transitions. [2022-10-15 18:19:20,722 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1078 transitions. Word has length 32 [2022-10-15 18:19:20,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:19:20,722 INFO L495 AbstractCegarLoop]: Abstraction has 708 states and 1078 transitions. [2022-10-15 18:19:20,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:20,723 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1078 transitions. [2022-10-15 18:19:20,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-10-15 18:19:20,725 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:19:20,725 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:19:20,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-15 18:19:20,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:19:20,939 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 18:19:20,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:19:20,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1300004221, now seen corresponding path program 2 times [2022-10-15 18:19:20,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:19:20,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806751920] [2022-10-15 18:19:20,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:20,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:19:20,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:21,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:19:21,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806751920] [2022-10-15 18:19:21,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806751920] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:19:21,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648048565] [2022-10-15 18:19:21,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:19:21,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:19:21,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:19:21,601 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:19:21,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-15 18:19:21,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 18:19:21,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:19:21,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-15 18:19:21,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:19:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-10-15 18:19:22,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:19:22,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648048565] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:19:22,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:19:22,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [17] total 19 [2022-10-15 18:19:22,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355122034] [2022-10-15 18:19:22,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:19:22,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 18:19:22,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:19:22,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 18:19:22,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2022-10-15 18:19:22,304 INFO L87 Difference]: Start difference. First operand 708 states and 1078 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:22,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:19:22,310 INFO L93 Difference]: Finished difference Result 714 states and 1083 transitions. [2022-10-15 18:19:22,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 18:19:22,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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 64 [2022-10-15 18:19:22,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:19:22,316 INFO L225 Difference]: With dead ends: 714 [2022-10-15 18:19:22,316 INFO L226 Difference]: Without dead ends: 713 [2022-10-15 18:19:22,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2022-10-15 18:19:22,317 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 8 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:19:22,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 157 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 48 Unchecked, 0.0s Time] [2022-10-15 18:19:22,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-10-15 18:19:22,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 708. [2022-10-15 18:19:22,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 694 states have (on average 1.5331412103746398) internal successors, (1064), 707 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:22,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1064 transitions. [2022-10-15 18:19:22,337 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1064 transitions. Word has length 64 [2022-10-15 18:19:22,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:19:22,338 INFO L495 AbstractCegarLoop]: Abstraction has 708 states and 1064 transitions. [2022-10-15 18:19:22,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:22,338 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1064 transitions. [2022-10-15 18:19:22,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-10-15 18:19:22,339 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:19:22,340 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:19:22,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-15 18:19:22,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:19:22,556 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 18:19:22,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:19:22,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1645423530, now seen corresponding path program 1 times [2022-10-15 18:19:22,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:19:22,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830769507] [2022-10-15 18:19:22,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:22,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:19:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:23,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:19:23,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830769507] [2022-10-15 18:19:23,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830769507] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:19:23,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317442517] [2022-10-15 18:19:23,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:23,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:19:23,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:19:23,047 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:19:23,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-15 18:19:23,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:23,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-15 18:19:23,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:19:23,299 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:23,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:19:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:23,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317442517] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:19:23,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:19:23,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-10-15 18:19:23,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932856555] [2022-10-15 18:19:23,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:19:23,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-10-15 18:19:23,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:19:23,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-10-15 18:19:23,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-15 18:19:23,730 INFO L87 Difference]: Start difference. First operand 708 states and 1064 transitions. Second operand has 33 states, 33 states have (on average 3.878787878787879) internal successors, (128), 33 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:24,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:19:24,857 INFO L93 Difference]: Finished difference Result 1726 states and 2134 transitions. [2022-10-15 18:19:24,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-10-15 18:19:24,858 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.878787878787879) internal successors, (128), 33 states have internal predecessors, (128), 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 65 [2022-10-15 18:19:24,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:19:24,867 INFO L225 Difference]: With dead ends: 1726 [2022-10-15 18:19:24,867 INFO L226 Difference]: Without dead ends: 1726 [2022-10-15 18:19:24,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-15 18:19:24,869 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 3849 mSDsluCounter, 1528 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3849 SdHoareTripleChecker+Valid, 1589 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-15 18:19:24,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3849 Valid, 1589 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-15 18:19:24,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2022-10-15 18:19:24,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1396. [2022-10-15 18:19:24,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1396 states, 1382 states have (on average 1.5224312590448625) internal successors, (2104), 1395 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:24,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 2104 transitions. [2022-10-15 18:19:24,907 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 2104 transitions. Word has length 65 [2022-10-15 18:19:24,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:19:24,907 INFO L495 AbstractCegarLoop]: Abstraction has 1396 states and 2104 transitions. [2022-10-15 18:19:24,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.878787878787879) internal successors, (128), 33 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:24,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 2104 transitions. [2022-10-15 18:19:24,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-10-15 18:19:24,910 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:19:24,910 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:19:24,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-15 18:19:25,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:19:25,125 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 18:19:25,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:19:25,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1160512890, now seen corresponding path program 2 times [2022-10-15 18:19:25,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:19:25,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840736259] [2022-10-15 18:19:25,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:25,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:19:25,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:27,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:27,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:19:27,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840736259] [2022-10-15 18:19:27,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840736259] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:19:27,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741535340] [2022-10-15 18:19:27,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:19:27,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:19:27,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:19:27,031 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:19:27,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-15 18:19:27,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 18:19:27,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:19:27,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-15 18:19:27,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:19:27,162 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-10-15 18:19:27,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-10-15 18:19:27,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2022-10-15 18:19:27,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:19:27,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741535340] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:19:27,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:19:27,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [33] total 35 [2022-10-15 18:19:27,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279093261] [2022-10-15 18:19:27,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:19:27,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 18:19:27,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:19:27,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 18:19:27,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=658, Unknown=0, NotChecked=0, Total=1190 [2022-10-15 18:19:27,424 INFO L87 Difference]: Start difference. First operand 1396 states and 2104 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 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) [2022-10-15 18:19:27,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:19:27,521 INFO L93 Difference]: Finished difference Result 1399 states and 2041 transitions. [2022-10-15 18:19:27,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 18:19:27,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 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 129 [2022-10-15 18:19:27,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:19:27,543 INFO L225 Difference]: With dead ends: 1399 [2022-10-15 18:19:27,544 INFO L226 Difference]: Without dead ends: 1399 [2022-10-15 18:19:27,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=536, Invalid=724, Unknown=0, NotChecked=0, Total=1260 [2022-10-15 18:19:27,549 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 112 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:19:27,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 76 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:19:27,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2022-10-15 18:19:27,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1394. [2022-10-15 18:19:27,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1382 states have (on average 1.4732272069464545) internal successors, (2036), 1393 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:27,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 2036 transitions. [2022-10-15 18:19:27,618 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 2036 transitions. Word has length 129 [2022-10-15 18:19:27,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:19:27,619 INFO L495 AbstractCegarLoop]: Abstraction has 1394 states and 2036 transitions. [2022-10-15 18:19:27,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 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) [2022-10-15 18:19:27,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 2036 transitions. [2022-10-15 18:19:27,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-10-15 18:19:27,621 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:19:27,621 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:19:27,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-10-15 18:19:27,836 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,SelfDestructingSolverStorable9 [2022-10-15 18:19:27,837 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 18:19:27,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:19:27,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1160512891, now seen corresponding path program 1 times [2022-10-15 18:19:27,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:19:27,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503219835] [2022-10-15 18:19:27,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:27,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:19:27,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:29,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:19:29,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503219835] [2022-10-15 18:19:29,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503219835] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:19:29,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334985663] [2022-10-15 18:19:29,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:29,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:19:29,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:19:29,442 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:19:29,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-15 18:19:29,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:29,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-15 18:19:29,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:19:29,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:29,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:19:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:31,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334985663] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:19:31,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:19:31,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-10-15 18:19:31,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173419676] [2022-10-15 18:19:31,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:19:31,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-10-15 18:19:31,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:19:31,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-10-15 18:19:31,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-15 18:19:31,327 INFO L87 Difference]: Start difference. First operand 1394 states and 2036 transitions. Second operand has 65 states, 65 states have (on average 3.9384615384615387) internal successors, (256), 65 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:37,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:19:37,461 INFO L93 Difference]: Finished difference Result 3330 states and 4114 transitions. [2022-10-15 18:19:37,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-10-15 18:19:37,462 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.9384615384615387) internal successors, (256), 65 states have internal predecessors, (256), 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 129 [2022-10-15 18:19:37,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:19:37,480 INFO L225 Difference]: With dead ends: 3330 [2022-10-15 18:19:37,481 INFO L226 Difference]: Without dead ends: 3330 [2022-10-15 18:19:37,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-15 18:19:37,484 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 11291 mSDsluCounter, 3082 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11291 SdHoareTripleChecker+Valid, 3141 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-10-15 18:19:37,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11291 Valid, 3141 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-10-15 18:19:37,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2022-10-15 18:19:37,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 2770. [2022-10-15 18:19:37,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2770 states, 2758 states have (on average 1.469180565627266) internal successors, (4052), 2769 states have internal predecessors, (4052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:37,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2770 states to 2770 states and 4052 transitions. [2022-10-15 18:19:37,591 INFO L78 Accepts]: Start accepts. Automaton has 2770 states and 4052 transitions. Word has length 129 [2022-10-15 18:19:37,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:19:37,592 INFO L495 AbstractCegarLoop]: Abstraction has 2770 states and 4052 transitions. [2022-10-15 18:19:37,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.9384615384615387) internal successors, (256), 65 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:37,592 INFO L276 IsEmpty]: Start isEmpty. Operand 2770 states and 4052 transitions. [2022-10-15 18:19:37,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-10-15 18:19:37,596 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:19:37,596 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:19:37,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-15 18:19:37,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:19:37,812 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 18:19:37,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:19:37,813 INFO L85 PathProgramCache]: Analyzing trace with hash 674904347, now seen corresponding path program 2 times [2022-10-15 18:19:37,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:19:37,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542752785] [2022-10-15 18:19:37,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:37,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:19:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:43,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:43,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:19:43,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542752785] [2022-10-15 18:19:43,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542752785] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:19:43,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136867813] [2022-10-15 18:19:43,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:19:43,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:19:43,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:19:43,556 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:19:43,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-15 18:19:43,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 18:19:43,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:19:43,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 14 conjunts are in the unsatisfiable core [2022-10-15 18:19:43,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:19:43,746 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-15 18:19:43,746 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 [2022-10-15 18:19:45,964 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2022-10-15 18:19:45,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:19:45,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136867813] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:19:45,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:19:45,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [65] total 67 [2022-10-15 18:19:45,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794615656] [2022-10-15 18:19:45,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:19:45,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 18:19:45,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:19:45,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 18:19:45,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2084, Invalid=2338, Unknown=0, NotChecked=0, Total=4422 [2022-10-15 18:19:45,970 INFO L87 Difference]: Start difference. First operand 2770 states and 4052 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 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) [2022-10-15 18:19:45,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:19:45,985 INFO L93 Difference]: Finished difference Result 2837 states and 4119 transitions. [2022-10-15 18:19:45,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 18:19:45,985 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 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 257 [2022-10-15 18:19:45,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:19:46,006 INFO L225 Difference]: With dead ends: 2837 [2022-10-15 18:19:46,006 INFO L226 Difference]: Without dead ends: 2837 [2022-10-15 18:19:46,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2084, Invalid=2338, Unknown=0, NotChecked=0, Total=4422 [2022-10-15 18:19:46,011 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:19:46,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 157 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 42 Unchecked, 0.0s Time] [2022-10-15 18:19:46,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2837 states. [2022-10-15 18:19:46,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2837 to 2832. [2022-10-15 18:19:46,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2832 states, 2820 states have (on average 1.4588652482269504) internal successors, (4114), 2831 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:46,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 4114 transitions. [2022-10-15 18:19:46,081 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 4114 transitions. Word has length 257 [2022-10-15 18:19:46,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:19:46,082 INFO L495 AbstractCegarLoop]: Abstraction has 2832 states and 4114 transitions. [2022-10-15 18:19:46,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 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) [2022-10-15 18:19:46,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 4114 transitions. [2022-10-15 18:19:46,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-10-15 18:19:46,086 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:19:46,086 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:19:46,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-15 18:19:46,302 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,SelfDestructingSolverStorable11 [2022-10-15 18:19:46,303 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 18:19:46,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:19:46,304 INFO L85 PathProgramCache]: Analyzing trace with hash 43015452, now seen corresponding path program 1 times [2022-10-15 18:19:46,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:19:46,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778427421] [2022-10-15 18:19:46,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:46,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:19:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2022-10-15 18:19:47,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:19:47,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778427421] [2022-10-15 18:19:47,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778427421] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:19:47,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:19:47,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 18:19:47,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210382326] [2022-10-15 18:19:47,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:19:47,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 18:19:47,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:19:47,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 18:19:47,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-15 18:19:47,038 INFO L87 Difference]: Start difference. First operand 2832 states and 4114 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 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) [2022-10-15 18:19:47,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:19:47,099 INFO L93 Difference]: Finished difference Result 2838 states and 4054 transitions. [2022-10-15 18:19:47,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 18:19:47,099 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 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 259 [2022-10-15 18:19:47,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:19:47,114 INFO L225 Difference]: With dead ends: 2838 [2022-10-15 18:19:47,114 INFO L226 Difference]: Without dead ends: 2838 [2022-10-15 18:19:47,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-15 18:19:47,115 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 115 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:19:47,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 103 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:19:47,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2838 states. [2022-10-15 18:19:47,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2838 to 2831. [2022-10-15 18:19:47,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2831 states, 2820 states have (on average 1.4354609929078015) internal successors, (4048), 2830 states have internal predecessors, (4048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:47,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2831 states to 2831 states and 4048 transitions. [2022-10-15 18:19:47,191 INFO L78 Accepts]: Start accepts. Automaton has 2831 states and 4048 transitions. Word has length 259 [2022-10-15 18:19:47,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:19:47,192 INFO L495 AbstractCegarLoop]: Abstraction has 2831 states and 4048 transitions. [2022-10-15 18:19:47,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 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) [2022-10-15 18:19:47,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2831 states and 4048 transitions. [2022-10-15 18:19:47,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-10-15 18:19:47,196 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:19:47,196 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:19:47,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-10-15 18:19:47,197 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 18:19:47,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:19:47,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1520543268, now seen corresponding path program 1 times [2022-10-15 18:19:47,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:19:47,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923737050] [2022-10-15 18:19:47,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:47,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:19:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:52,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:52,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:19:52,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923737050] [2022-10-15 18:19:52,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923737050] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:19:52,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947079216] [2022-10-15 18:19:52,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:52,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:19:52,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:19:52,725 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:19:52,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-15 18:19:52,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:52,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 64 conjunts are in the unsatisfiable core [2022-10-15 18:19:53,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:19:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:53,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:19:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:59,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947079216] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:19:59,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:19:59,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 129 [2022-10-15 18:19:59,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279453980] [2022-10-15 18:19:59,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:19:59,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-10-15 18:19:59,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:19:59,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-10-15 18:19:59,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2022-10-15 18:19:59,326 INFO L87 Difference]: Start difference. First operand 2831 states and 4048 transitions. Second operand has 129 states, 129 states have (on average 4.015503875968992) internal successors, (518), 129 states have internal predecessors, (518), 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)