/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_copy7_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 18:10:35,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 18:10:35,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 18:10:35,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 18:10:35,746 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 18:10:35,747 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 18:10:35,749 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 18:10:35,767 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 18:10:35,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 18:10:35,770 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 18:10:35,771 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 18:10:35,773 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 18:10:35,774 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 18:10:35,775 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 18:10:35,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 18:10:35,778 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 18:10:35,782 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 18:10:35,783 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 18:10:35,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 18:10:35,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 18:10:35,793 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 18:10:35,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 18:10:35,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 18:10:35,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 18:10:35,806 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-15 18:10:35,816 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 18:10:35,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 18:10:35,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 18:10:35,819 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 18:10:35,851 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 18:10:35,851 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 18:10:35,853 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 18:10:35,853 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 18:10:35,854 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 18:10:35,854 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 18:10:35,856 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 18:10:35,856 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 18:10:35,857 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 18:10:35,857 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 18:10:35,857 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 18:10:35,857 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 18:10:35,859 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 18:10:35,859 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 18:10:35,859 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 18:10:35,860 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 18:10:35,860 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 18:10:35,860 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 18:10:35,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 18:10:35,861 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 18:10:35,861 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 18:10:35,861 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 18:10:35,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 18:10:35,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 18:10:35,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 18:10:35,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:10:35,863 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 18:10:35,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 18:10:35,864 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 18:10:35,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 18:10:35,865 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 18:10:36,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 18:10:36,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 18:10:36,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 18:10:36,312 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 18:10:36,313 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 18:10:36,314 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy7_ground-2.i [2022-10-15 18:10:36,396 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c04c709c/5e9df5223ee04948b3e950d732abb465/FLAG2baab11be [2022-10-15 18:10:37,046 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 18:10:37,047 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy7_ground-2.i [2022-10-15 18:10:37,058 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c04c709c/5e9df5223ee04948b3e950d732abb465/FLAG2baab11be [2022-10-15 18:10:37,367 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c04c709c/5e9df5223ee04948b3e950d732abb465 [2022-10-15 18:10:37,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 18:10:37,384 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 18:10:37,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 18:10:37,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 18:10:37,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 18:10:37,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:10:37" (1/1) ... [2022-10-15 18:10:37,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c8d9e69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:37, skipping insertion in model container [2022-10-15 18:10:37,395 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:10:37" (1/1) ... [2022-10-15 18:10:37,404 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 18:10:37,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 18:10:37,642 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy7_ground-2.i[816,829] [2022-10-15 18:10:37,667 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:10:37,676 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 18:10:37,689 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy7_ground-2.i[816,829] [2022-10-15 18:10:37,704 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:10:37,721 INFO L208 MainTranslator]: Completed translation [2022-10-15 18:10:37,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:37 WrapperNode [2022-10-15 18:10:37,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 18:10:37,723 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 18:10:37,723 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 18:10:37,723 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 18:10:37,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:37" (1/1) ... [2022-10-15 18:10:37,742 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:37" (1/1) ... [2022-10-15 18:10:37,772 INFO L138 Inliner]: procedures = 16, calls = 48, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 160 [2022-10-15 18:10:37,773 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 18:10:37,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 18:10:37,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 18:10:37,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 18:10:37,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:37" (1/1) ... [2022-10-15 18:10:37,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:37" (1/1) ... [2022-10-15 18:10:37,788 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:37" (1/1) ... [2022-10-15 18:10:37,789 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:37" (1/1) ... [2022-10-15 18:10:37,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:37" (1/1) ... [2022-10-15 18:10:37,804 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:37" (1/1) ... [2022-10-15 18:10:37,809 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:37" (1/1) ... [2022-10-15 18:10:37,811 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:37" (1/1) ... [2022-10-15 18:10:37,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 18:10:37,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 18:10:37,818 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 18:10:37,818 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 18:10:37,819 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:37" (1/1) ... [2022-10-15 18:10:37,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:10:37,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:10:37,860 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 18:10:37,886 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 18:10:37,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 18:10:37,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 18:10:37,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 18:10:37,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 18:10:37,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 18:10:37,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 18:10:37,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 18:10:37,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 18:10:38,059 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 18:10:38,062 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 18:10:38,674 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 18:10:38,682 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 18:10:38,683 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-10-15 18:10:38,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:10:38 BoogieIcfgContainer [2022-10-15 18:10:38,685 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 18:10:38,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 18:10:38,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 18:10:38,692 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 18:10:38,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 06:10:37" (1/3) ... [2022-10-15 18:10:38,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7757f8f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:10:38, skipping insertion in model container [2022-10-15 18:10:38,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:37" (2/3) ... [2022-10-15 18:10:38,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7757f8f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:10:38, skipping insertion in model container [2022-10-15 18:10:38,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:10:38" (3/3) ... [2022-10-15 18:10:38,695 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy7_ground-2.i [2022-10-15 18:10:38,715 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 18:10:38,716 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 36 error locations. [2022-10-15 18:10:38,766 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 18:10:38,775 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;@3d9f3303, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 18:10:38,776 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2022-10-15 18:10:38,781 INFO L276 IsEmpty]: Start isEmpty. Operand has 97 states, 60 states have (on average 1.9166666666666667) internal successors, (115), 96 states have internal predecessors, (115), 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 18:10:38,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:10:38,791 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:38,792 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:10:38,792 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2022-10-15 18:10:38,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:38,798 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-10-15 18:10:38,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:38,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791612430] [2022-10-15 18:10:38,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:38,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:40,442 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 18:10:40,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:40,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791612430] [2022-10-15 18:10:40,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791612430] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:10:40,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:10:40,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:10:40,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178239006] [2022-10-15 18:10:40,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:10:40,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:10:40,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:40,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:10:40,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:10:40,505 INFO L87 Difference]: Start difference. First operand has 97 states, 60 states have (on average 1.9166666666666667) internal successors, (115), 96 states have internal predecessors, (115), 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 18:10:40,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:40,663 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2022-10-15 18:10:40,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:10:40,668 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 18:10:40,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:40,696 INFO L225 Difference]: With dead ends: 94 [2022-10-15 18:10:40,697 INFO L226 Difference]: Without dead ends: 92 [2022-10-15 18:10:40,700 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 18:10:40,705 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 95 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:40,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 68 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:10:40,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-10-15 18:10:40,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-10-15 18:10:40,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 59 states have (on average 1.694915254237288) internal successors, (100), 91 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:40,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2022-10-15 18:10:40,772 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 4 [2022-10-15 18:10:40,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:40,777 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2022-10-15 18:10:40,778 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 18:10:40,778 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2022-10-15 18:10:40,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:10:40,779 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:40,780 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:10:40,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 18:10:40,781 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2022-10-15 18:10:40,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:40,782 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-10-15 18:10:40,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:40,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145615785] [2022-10-15 18:10:40,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:40,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:40,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:41,559 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 18:10:41,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:41,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145615785] [2022-10-15 18:10:41,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145615785] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:10:41,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:10:41,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:10:41,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990667069] [2022-10-15 18:10:41,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:10:41,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:10:41,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:41,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:10:41,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:10:41,564 INFO L87 Difference]: Start difference. First operand 92 states and 100 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 18:10:41,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:41,646 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2022-10-15 18:10:41,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:10:41,647 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 18:10:41,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:41,648 INFO L225 Difference]: With dead ends: 96 [2022-10-15 18:10:41,649 INFO L226 Difference]: Without dead ends: 96 [2022-10-15 18:10:41,649 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 18:10:41,651 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 2 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:41,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 157 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:10:41,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-10-15 18:10:41,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2022-10-15 18:10:41,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 61 states have (on average 1.6721311475409837) internal successors, (102), 93 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:41,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2022-10-15 18:10:41,664 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 4 [2022-10-15 18:10:41,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:41,665 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2022-10-15 18:10:41,665 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 18:10:41,666 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2022-10-15 18:10:41,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-15 18:10:41,666 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:41,667 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-10-15 18:10:41,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 18:10:41,667 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2022-10-15 18:10:41,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:41,668 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2022-10-15 18:10:41,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:41,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428528001] [2022-10-15 18:10:41,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:41,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:42,758 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 18:10:42,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:42,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428528001] [2022-10-15 18:10:42,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428528001] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:10:42,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806775917] [2022-10-15 18:10:42,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:42,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:42,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:10:42,763 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 18:10:42,782 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 18:10:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:42,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 71 conjunts are in the unsatisfiable core [2022-10-15 18:10:42,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:10:43,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:43,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:43,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:43,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:43,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:43,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:43,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:43,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:43,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:43,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:43,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:43,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:43,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:43,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:43,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:43,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:43,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:43,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:43,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:43,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:43,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:43,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:43,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:43,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:43,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:43,285 INFO L356 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-10-15 18:10:43,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 25 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 53 [2022-10-15 18:10:43,350 INFO L356 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2022-10-15 18:10:43,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 131 treesize of output 119 [2022-10-15 18:10:43,482 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 18:10:43,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:10:43,711 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 18:10:43,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806775917] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:10:43,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:10:43,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-10-15 18:10:43,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520440345] [2022-10-15 18:10:43,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:10:43,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-15 18:10:43,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:43,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-15 18:10:43,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-15 18:10:43,715 INFO L87 Difference]: Start difference. First operand 94 states and 102 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 18:10:44,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:44,147 INFO L93 Difference]: Finished difference Result 272 states and 298 transitions. [2022-10-15 18:10:44,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 18:10:44,148 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 18:10:44,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:44,151 INFO L225 Difference]: With dead ends: 272 [2022-10-15 18:10:44,151 INFO L226 Difference]: Without dead ends: 272 [2022-10-15 18:10:44,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 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 18:10:44,153 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 281 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:44,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 362 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-15 18:10:44,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-10-15 18:10:44,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 106. [2022-10-15 18:10:44,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 73 states have (on average 1.5890410958904109) internal successors, (116), 105 states have internal predecessors, (116), 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 18:10:44,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2022-10-15 18:10:44,167 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 8 [2022-10-15 18:10:44,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:44,168 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2022-10-15 18:10:44,168 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 18:10:44,168 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2022-10-15 18:10:44,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-15 18:10:44,169 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:44,169 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 18:10:44,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-10-15 18:10:44,383 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 18:10:44,383 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2022-10-15 18:10:44,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:44,385 INFO L85 PathProgramCache]: Analyzing trace with hash -144029224, now seen corresponding path program 1 times [2022-10-15 18:10:44,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:44,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365121043] [2022-10-15 18:10:44,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:44,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:44,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 18:10:44,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:44,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365121043] [2022-10-15 18:10:44,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365121043] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:10:44,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574692608] [2022-10-15 18:10:44,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:44,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:44,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:10:44,534 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 18:10:44,553 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 18:10:44,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:44,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-15 18:10:44,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:10:44,685 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 18:10:44,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:10:44,737 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 18:10:44,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574692608] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:10:44,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:10:44,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-10-15 18:10:44,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132978407] [2022-10-15 18:10:44,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:10:44,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-15 18:10:44,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:44,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-15 18:10:44,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-10-15 18:10:44,741 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 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 18:10:45,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:45,198 INFO L93 Difference]: Finished difference Result 175 states and 183 transitions. [2022-10-15 18:10:45,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-15 18:10:45,198 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-10-15 18:10:45,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:45,200 INFO L225 Difference]: With dead ends: 175 [2022-10-15 18:10:45,200 INFO L226 Difference]: Without dead ends: 175 [2022-10-15 18:10:45,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-10-15 18:10:45,202 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 228 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:45,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 272 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-15 18:10:45,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-10-15 18:10:45,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 121. [2022-10-15 18:10:45,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 88 states have (on average 1.4772727272727273) internal successors, (130), 120 states have internal predecessors, (130), 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 18:10:45,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 130 transitions. [2022-10-15 18:10:45,213 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 130 transitions. Word has length 14 [2022-10-15 18:10:45,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:45,213 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 130 transitions. [2022-10-15 18:10:45,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 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 18:10:45,214 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 130 transitions. [2022-10-15 18:10:45,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-15 18:10:45,214 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:45,215 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2022-10-15 18:10:45,251 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 18:10:45,428 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 18:10:45,429 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2022-10-15 18:10:45,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:45,430 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2022-10-15 18:10:45,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:45,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509968247] [2022-10-15 18:10:45,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:45,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:46,092 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 18:10:46,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:46,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509968247] [2022-10-15 18:10:46,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509968247] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:10:46,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144651763] [2022-10-15 18:10:46,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:10:46,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:46,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:10:46,095 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 18:10:46,113 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 18:10:46,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:10:46,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:10:46,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 79 conjunts are in the unsatisfiable core [2022-10-15 18:10:46,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:10:46,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:46,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:46,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:46,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:46,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:46,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:46,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:46,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:46,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:46,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:46,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:46,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:46,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:46,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:46,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:46,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:46,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:46,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:46,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:46,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:46,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:46,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:46,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:46,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:46,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:46,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:46,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:46,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:46,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 28 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 41 [2022-10-15 18:10:46,439 INFO L356 Elim1Store]: treesize reduction 168, result has 0.6 percent of original size [2022-10-15 18:10:46,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 148 treesize of output 134 [2022-10-15 18:10:46,635 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 18:10:46,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:10:47,009 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 18:10:47,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144651763] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:10:47,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:10:47,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-10-15 18:10:47,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581565315] [2022-10-15 18:10:47,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:10:47,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-15 18:10:47,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:47,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-15 18:10:47,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-10-15 18:10:47,013 INFO L87 Difference]: Start difference. First operand 121 states and 130 transitions. Second operand has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 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 18:10:47,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:47,703 INFO L93 Difference]: Finished difference Result 502 states and 546 transitions. [2022-10-15 18:10:47,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-15 18:10:47,705 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 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 18:10:47,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:47,709 INFO L225 Difference]: With dead ends: 502 [2022-10-15 18:10:47,710 INFO L226 Difference]: Without dead ends: 502 [2022-10-15 18:10:47,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2022-10-15 18:10:47,712 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 932 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 932 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:47,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [932 Valid, 573 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-15 18:10:47,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-10-15 18:10:47,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 138. [2022-10-15 18:10:47,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 105 states have (on average 1.4285714285714286) internal successors, (150), 137 states have internal predecessors, (150), 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 18:10:47,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 150 transitions. [2022-10-15 18:10:47,725 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 150 transitions. Word has length 20 [2022-10-15 18:10:47,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:47,725 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 150 transitions. [2022-10-15 18:10:47,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 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 18:10:47,726 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 150 transitions. [2022-10-15 18:10:47,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-10-15 18:10:47,727 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:47,727 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:10:47,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-15 18:10:47,940 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 18:10:47,941 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2022-10-15 18:10:47,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:47,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1600161919, now seen corresponding path program 1 times [2022-10-15 18:10:47,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:47,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940161951] [2022-10-15 18:10:47,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:47,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:48,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:48,159 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 18:10:48,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:48,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940161951] [2022-10-15 18:10:48,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940161951] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:10:48,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563196527] [2022-10-15 18:10:48,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:48,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:48,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:10:48,162 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 18:10:48,166 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 18:10:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:48,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 18:10:48,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:10:48,308 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 18:10:48,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:10:48,410 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 18:10:48,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563196527] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:10:48,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:10:48,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-10-15 18:10:48,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092804177] [2022-10-15 18:10:48,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:10:48,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-15 18:10:48,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:48,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-15 18:10:48,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-15 18:10:48,414 INFO L87 Difference]: Start difference. First operand 138 states and 150 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 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 18:10:48,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:48,481 INFO L93 Difference]: Finished difference Result 156 states and 164 transitions. [2022-10-15 18:10:48,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-15 18:10:48,482 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 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 18:10:48,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:48,483 INFO L225 Difference]: With dead ends: 156 [2022-10-15 18:10:48,483 INFO L226 Difference]: Without dead ends: 156 [2022-10-15 18:10:48,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 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 18:10:48,485 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 70 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:48,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 203 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:10:48,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-10-15 18:10:48,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2022-10-15 18:10:48,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 120 states have (on average 1.3666666666666667) internal successors, (164), 152 states have internal predecessors, (164), 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 18:10:48,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 164 transitions. [2022-10-15 18:10:48,493 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 164 transitions. Word has length 31 [2022-10-15 18:10:48,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:48,493 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 164 transitions. [2022-10-15 18:10:48,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 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 18:10:48,494 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 164 transitions. [2022-10-15 18:10:48,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-10-15 18:10:48,495 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:48,495 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1] [2022-10-15 18:10:48,534 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 18:10:48,708 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 18:10:48,708 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2022-10-15 18:10:48,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:48,711 INFO L85 PathProgramCache]: Analyzing trace with hash -256132636, now seen corresponding path program 3 times [2022-10-15 18:10:48,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:48,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142263047] [2022-10-15 18:10:48,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:48,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:50,115 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:50,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:50,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142263047] [2022-10-15 18:10:50,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142263047] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:10:50,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997127762] [2022-10-15 18:10:50,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 18:10:50,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:50,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:10:50,118 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 18:10:50,140 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 18:10:50,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-15 18:10:50,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:10:50,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 53 conjunts are in the unsatisfiable core [2022-10-15 18:10:50,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:10:50,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:50,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:50,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:50,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:50,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:50,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:50,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:50,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:50,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:50,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:50,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:50,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:50,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:50,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:50,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:50,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:50,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:50,451 INFO L356 Elim1Store]: treesize reduction 155, result has 21.7 percent of original size [2022-10-15 18:10:50,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 17 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 58 [2022-10-15 18:10:50,477 INFO L356 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2022-10-15 18:10:50,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 81 [2022-10-15 18:10:50,836 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-10-15 18:10:50,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:10:50,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997127762] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:10:50,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:10:50,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 16 [2022-10-15 18:10:50,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858939237] [2022-10-15 18:10:50,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:10:50,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 18:10:50,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:50,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 18:10:50,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-10-15 18:10:50,839 INFO L87 Difference]: Start difference. First operand 153 states and 164 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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 18:10:50,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:50,944 INFO L93 Difference]: Finished difference Result 152 states and 160 transitions. [2022-10-15 18:10:50,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 18:10:50,944 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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 44 [2022-10-15 18:10:50,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:50,946 INFO L225 Difference]: With dead ends: 152 [2022-10-15 18:10:50,946 INFO L226 Difference]: Without dead ends: 152 [2022-10-15 18:10:50,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-10-15 18:10:50,947 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 186 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:50,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 126 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:10:50,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-10-15 18:10:50,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-10-15 18:10:50,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 120 states have (on average 1.3333333333333333) internal successors, (160), 151 states have internal predecessors, (160), 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 18:10:50,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 160 transitions. [2022-10-15 18:10:50,953 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 160 transitions. Word has length 44 [2022-10-15 18:10:50,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:50,954 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 160 transitions. [2022-10-15 18:10:50,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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 18:10:50,954 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 160 transitions. [2022-10-15 18:10:50,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-10-15 18:10:50,956 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:50,956 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:10:50,997 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 18:10:51,171 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 18:10:51,172 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2022-10-15 18:10:51,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:51,173 INFO L85 PathProgramCache]: Analyzing trace with hash -789348505, now seen corresponding path program 2 times [2022-10-15 18:10:51,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:51,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551133043] [2022-10-15 18:10:51,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:51,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:51,618 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 18:10:51,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:51,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551133043] [2022-10-15 18:10:51,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551133043] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:10:51,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475894510] [2022-10-15 18:10:51,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:10:51,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:51,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:10:51,624 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 18:10:51,643 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 18:10:51,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 18:10:51,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:10:51,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 41 conjunts are in the unsatisfiable core [2022-10-15 18:10:51,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:10:52,013 INFO L356 Elim1Store]: treesize reduction 537, result has 10.4 percent of original size [2022-10-15 18:10:52,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 12 case distinctions, treesize of input 656 treesize of output 669 [2022-10-15 18:10:52,388 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 18:10:52,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:10:52,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475894510] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:10:52,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:10:52,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [17] total 18 [2022-10-15 18:10:52,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200515848] [2022-10-15 18:10:52,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:10:52,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:10:52,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:52,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:10:52,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-10-15 18:10:52,392 INFO L87 Difference]: Start difference. First operand 152 states and 160 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:52,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:52,435 INFO L93 Difference]: Finished difference Result 150 states and 158 transitions. [2022-10-15 18:10:52,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:10:52,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-10-15 18:10:52,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:52,439 INFO L225 Difference]: With dead ends: 150 [2022-10-15 18:10:52,439 INFO L226 Difference]: Without dead ends: 150 [2022-10-15 18:10:52,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-10-15 18:10:52,441 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 85 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:52,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 65 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:10:52,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-10-15 18:10:52,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2022-10-15 18:10:52,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 120 states have (on average 1.3166666666666667) internal successors, (158), 149 states have internal predecessors, (158), 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 18:10:52,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 158 transitions. [2022-10-15 18:10:52,449 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 158 transitions. Word has length 63 [2022-10-15 18:10:52,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:52,450 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 158 transitions. [2022-10-15 18:10:52,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:52,450 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 158 transitions. [2022-10-15 18:10:52,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-10-15 18:10:52,460 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:52,460 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:10:52,503 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 18:10:52,676 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 18:10:52,677 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2022-10-15 18:10:52,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:52,678 INFO L85 PathProgramCache]: Analyzing trace with hash -789348504, now seen corresponding path program 1 times [2022-10-15 18:10:52,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:52,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203807701] [2022-10-15 18:10:52,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:52,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:52,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:53,134 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 18:10:53,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:53,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203807701] [2022-10-15 18:10:53,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203807701] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:10:53,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499433048] [2022-10-15 18:10:53,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:53,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:53,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:10:53,136 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 18:10:53,155 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 18:10:53,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:53,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-15 18:10:53,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:10:53,357 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 18:10:53,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:10:53,740 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 18:10:53,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499433048] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:10:53,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:10:53,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-10-15 18:10:53,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897812751] [2022-10-15 18:10:53,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:10:53,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-10-15 18:10:53,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:53,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-10-15 18:10:53,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-15 18:10:53,744 INFO L87 Difference]: Start difference. First operand 150 states and 158 transitions. Second operand has 33 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 33 states have internal predecessors, (126), 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 18:10:53,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:53,880 INFO L93 Difference]: Finished difference Result 214 states and 222 transitions. [2022-10-15 18:10:53,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-10-15 18:10:53,881 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 33 states have internal predecessors, (126), 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 63 [2022-10-15 18:10:53,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:53,883 INFO L225 Difference]: With dead ends: 214 [2022-10-15 18:10:53,883 INFO L226 Difference]: Without dead ends: 214 [2022-10-15 18:10:53,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 110 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 18:10:53,884 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 135 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:53,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 488 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:10:53,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-10-15 18:10:53,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2022-10-15 18:10:53,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 184 states have (on average 1.2065217391304348) internal successors, (222), 213 states have internal predecessors, (222), 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 18:10:53,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 222 transitions. [2022-10-15 18:10:53,890 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 222 transitions. Word has length 63 [2022-10-15 18:10:53,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:53,890 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 222 transitions. [2022-10-15 18:10:53,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 33 states have internal predecessors, (126), 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 18:10:53,891 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 222 transitions. [2022-10-15 18:10:53,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-10-15 18:10:53,892 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:53,892 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:10:53,929 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 18:10:54,104 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 18:10:54,105 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2022-10-15 18:10:54,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:54,106 INFO L85 PathProgramCache]: Analyzing trace with hash 689474872, now seen corresponding path program 2 times [2022-10-15 18:10:54,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:54,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831323435] [2022-10-15 18:10:54,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:54,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:54,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:55,419 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 18:10:55,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:55,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831323435] [2022-10-15 18:10:55,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831323435] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:10:55,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103987608] [2022-10-15 18:10:55,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:10:55,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:55,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:10:55,423 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 18:10:55,446 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 18:10:55,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 18:10:55,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:10:55,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 25 conjunts are in the unsatisfiable core [2022-10-15 18:10:55,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:10:55,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:55,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:55,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:55,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:55,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:55,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:55,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:55,901 INFO L356 Elim1Store]: treesize reduction 306, result has 25.7 percent of original size [2022-10-15 18:10:55,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 27 treesize of output 111 [2022-10-15 18:10:56,060 INFO L356 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2022-10-15 18:10:56,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 214297 treesize of output 213289 [2022-10-15 18:11:14,023 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 18:11:14,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:11:14,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103987608] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:11:14,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:11:14,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [33] total 35 [2022-10-15 18:11:14,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733893188] [2022-10-15 18:11:14,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:11:14,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 18:11:14,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:11:14,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 18:11:14,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-10-15 18:11:14,026 INFO L87 Difference]: Start difference. First operand 214 states and 222 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 18:11:14,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:11:14,201 INFO L93 Difference]: Finished difference Result 263 states and 271 transitions. [2022-10-15 18:11:14,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 18:11:14,202 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 127 [2022-10-15 18:11:14,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:11:14,205 INFO L225 Difference]: With dead ends: 263 [2022-10-15 18:11:14,205 INFO L226 Difference]: Without dead ends: 263 [2022-10-15 18:11:14,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-10-15 18:11:14,207 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 132 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:11:14,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 83 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:11:14,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-10-15 18:11:14,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 216. [2022-10-15 18:11:14,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 186 states have (on average 1.2043010752688172) internal successors, (224), 215 states have internal predecessors, (224), 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 18:11:14,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 224 transitions. [2022-10-15 18:11:14,213 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 224 transitions. Word has length 127 [2022-10-15 18:11:14,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:11:14,214 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 224 transitions. [2022-10-15 18:11:14,214 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 18:11:14,214 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 224 transitions. [2022-10-15 18:11:14,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-10-15 18:11:14,216 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:11:14,216 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:11:14,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-15 18:11:14,431 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 18:11:14,432 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2022-10-15 18:11:14,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:11:14,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1559004773, now seen corresponding path program 1 times [2022-10-15 18:11:14,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:11:14,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583508723] [2022-10-15 18:11:14,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:11:14,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:11:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:11:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:11:15,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:11:15,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583508723] [2022-10-15 18:11:15,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583508723] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:11:15,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519896750] [2022-10-15 18:11:15,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:11:15,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:11:15,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:11:15,680 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 18:11:15,698 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 18:11:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:11:15,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-15 18:11:15,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:11:16,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:11:16,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:11:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:11:17,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519896750] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:11:17,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:11:17,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-10-15 18:11:17,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364621100] [2022-10-15 18:11:17,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:11:17,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-10-15 18:11:17,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:11:17,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-10-15 18:11:17,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-15 18:11:17,630 INFO L87 Difference]: Start difference. First operand 216 states and 224 transitions. Second operand has 65 states, 65 states have (on average 3.953846153846154) internal successors, (257), 65 states have internal predecessors, (257), 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 18:11:18,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:11:18,028 INFO L93 Difference]: Finished difference Result 344 states and 352 transitions. [2022-10-15 18:11:18,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-10-15 18:11:18,029 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.953846153846154) internal successors, (257), 65 states have internal predecessors, (257), 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 131 [2022-10-15 18:11:18,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:11:18,033 INFO L225 Difference]: With dead ends: 344 [2022-10-15 18:11:18,033 INFO L226 Difference]: Without dead ends: 344 [2022-10-15 18:11:18,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 230 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 18:11:18,038 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 186 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 18:11:18,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 429 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 18:11:18,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-10-15 18:11:18,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2022-10-15 18:11:18,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 314 states have (on average 1.1210191082802548) internal successors, (352), 343 states have internal predecessors, (352), 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 18:11:18,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 352 transitions. [2022-10-15 18:11:18,047 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 352 transitions. Word has length 131 [2022-10-15 18:11:18,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:11:18,048 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 352 transitions. [2022-10-15 18:11:18,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.953846153846154) internal successors, (257), 65 states have internal predecessors, (257), 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 18:11:18,048 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 352 transitions. [2022-10-15 18:11:18,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-10-15 18:11:18,055 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:11:18,055 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:11:18,095 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 18:11:18,269 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 18:11:18,270 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2022-10-15 18:11:18,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:11:18,271 INFO L85 PathProgramCache]: Analyzing trace with hash -77380293, now seen corresponding path program 2 times [2022-10-15 18:11:18,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:11:18,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441811162] [2022-10-15 18:11:18,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:11:18,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:11:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:11:22,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7628 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:11:22,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:11:22,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441811162] [2022-10-15 18:11:22,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441811162] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:11:22,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563491038] [2022-10-15 18:11:22,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:11:22,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:11:22,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:11:22,598 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 18:11:22,603 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 18:11:22,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:11:22,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:11:22,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 64 conjunts are in the unsatisfiable core [2022-10-15 18:11:22,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:11:23,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7628 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:11:23,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:11:28,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7628 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:11:28,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563491038] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:11:28,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:11:28,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 129 [2022-10-15 18:11:28,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181088196] [2022-10-15 18:11:28,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:11:28,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-10-15 18:11:28,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:11:28,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-10-15 18:11:28,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2022-10-15 18:11:28,922 INFO L87 Difference]: Start difference. First operand 344 states and 352 transitions. Second operand has 129 states, 129 states have (on average 3.9767441860465116) internal successors, (513), 129 states have internal predecessors, (513), 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 18:11:29,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:11:29,720 INFO L93 Difference]: Finished difference Result 600 states and 608 transitions. [2022-10-15 18:11:29,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-10-15 18:11:29,721 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 3.9767441860465116) internal successors, (513), 129 states have internal predecessors, (513), 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 18:11:29,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:11:29,725 INFO L225 Difference]: With dead ends: 600 [2022-10-15 18:11:29,725 INFO L226 Difference]: Without dead ends: 600 [2022-10-15 18:11:29,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2022-10-15 18:11:29,730 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 378 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-15 18:11:29,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 493 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-15 18:11:29,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-10-15 18:11:29,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2022-10-15 18:11:29,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 570 states have (on average 1.0666666666666667) internal successors, (608), 599 states have internal predecessors, (608), 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 18:11:29,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 608 transitions. [2022-10-15 18:11:29,744 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 608 transitions. Word has length 259 [2022-10-15 18:11:29,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:11:29,745 INFO L495 AbstractCegarLoop]: Abstraction has 600 states and 608 transitions. [2022-10-15 18:11:29,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 3.9767441860465116) internal successors, (513), 129 states have internal predecessors, (513), 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 18:11:29,746 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 608 transitions. [2022-10-15 18:11:29,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2022-10-15 18:11:29,757 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:11:29,757 INFO L195 NwaCegarLoop]: trace histogram [126, 126, 126, 126, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:11:29,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0