/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/sorting_selectionsort_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-16 05:15:35,754 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-16 05:15:35,757 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-16 05:15:35,800 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-16 05:15:35,800 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-16 05:15:35,802 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-16 05:15:35,803 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-16 05:15:35,806 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-16 05:15:35,808 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-16 05:15:35,809 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-16 05:15:35,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-16 05:15:35,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-16 05:15:35,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-16 05:15:35,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-16 05:15:35,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-16 05:15:35,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-16 05:15:35,817 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-16 05:15:35,818 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-16 05:15:35,820 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-16 05:15:35,823 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-16 05:15:35,825 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-16 05:15:35,826 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-16 05:15:35,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-16 05:15:35,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-16 05:15:35,834 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-16 05:15:35,844 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-16 05:15:35,845 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-16 05:15:35,847 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-16 05:15:35,848 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-16 05:15:35,905 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-16 05:15:35,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-16 05:15:35,906 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-16 05:15:35,906 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-16 05:15:35,907 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-16 05:15:35,908 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-16 05:15:35,909 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-16 05:15:35,909 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-16 05:15:35,909 INFO L138 SettingsManager]: * Use SBE=true [2022-10-16 05:15:35,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-16 05:15:35,910 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-16 05:15:35,910 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-16 05:15:35,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-16 05:15:35,911 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-16 05:15:35,911 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-16 05:15:35,911 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-16 05:15:35,911 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-16 05:15:35,912 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-16 05:15:35,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-16 05:15:35,912 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-16 05:15:35,912 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-16 05:15:35,913 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-16 05:15:35,913 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-16 05:15:35,913 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-16 05:15:35,913 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-16 05:15:35,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 05:15:35,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-16 05:15:35,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-16 05:15:35,915 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-16 05:15:35,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-16 05:15:35,915 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-16 05:15:36,263 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-16 05:15:36,292 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-16 05:15:36,295 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-16 05:15:36,297 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-16 05:15:36,297 INFO L275 PluginConnector]: CDTParser initialized [2022-10-16 05:15:36,299 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i [2022-10-16 05:15:36,377 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5041d82da/6db2eeb40f7443f69c77f800b1f1fd07/FLAG9e1a13bec [2022-10-16 05:15:36,933 INFO L306 CDTParser]: Found 1 translation units. [2022-10-16 05:15:36,933 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i [2022-10-16 05:15:36,943 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5041d82da/6db2eeb40f7443f69c77f800b1f1fd07/FLAG9e1a13bec [2022-10-16 05:15:37,330 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5041d82da/6db2eeb40f7443f69c77f800b1f1fd07 [2022-10-16 05:15:37,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-16 05:15:37,341 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-16 05:15:37,345 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-16 05:15:37,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-16 05:15:37,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-16 05:15:37,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:15:37" (1/1) ... [2022-10-16 05:15:37,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@122a05f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:15:37, skipping insertion in model container [2022-10-16 05:15:37,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:15:37" (1/1) ... [2022-10-16 05:15:37,363 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-16 05:15:37,384 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-16 05:15:37,610 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/sorting_selectionsort_ground-2.i[823,836] [2022-10-16 05:15:37,635 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 05:15:37,647 INFO L203 MainTranslator]: Completed pre-run [2022-10-16 05:15:37,662 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/sorting_selectionsort_ground-2.i[823,836] [2022-10-16 05:15:37,675 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 05:15:37,691 INFO L208 MainTranslator]: Completed translation [2022-10-16 05:15:37,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:15:37 WrapperNode [2022-10-16 05:15:37,691 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-16 05:15:37,693 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-16 05:15:37,693 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-16 05:15:37,693 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-16 05:15:37,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:15:37" (1/1) ... [2022-10-16 05:15:37,713 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:15:37" (1/1) ... [2022-10-16 05:15:37,768 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 114 [2022-10-16 05:15:37,768 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-16 05:15:37,771 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-16 05:15:37,771 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-16 05:15:37,771 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-16 05:15:37,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:15:37" (1/1) ... [2022-10-16 05:15:37,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:15:37" (1/1) ... [2022-10-16 05:15:37,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:15:37" (1/1) ... [2022-10-16 05:15:37,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:15:37" (1/1) ... [2022-10-16 05:15:37,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:15:37" (1/1) ... [2022-10-16 05:15:37,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:15:37" (1/1) ... [2022-10-16 05:15:37,836 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:15:37" (1/1) ... [2022-10-16 05:15:37,840 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:15:37" (1/1) ... [2022-10-16 05:15:37,843 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-16 05:15:37,846 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-16 05:15:37,847 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-16 05:15:37,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-16 05:15:37,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:15:37" (1/1) ... [2022-10-16 05:15:37,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 05:15:37,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:15:37,893 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-16 05:15:37,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-16 05:15:37,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-16 05:15:37,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-16 05:15:37,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-16 05:15:37,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-16 05:15:37,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-16 05:15:37,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-16 05:15:37,984 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-16 05:15:37,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-16 05:15:37,985 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-16 05:15:37,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-16 05:15:38,108 INFO L235 CfgBuilder]: Building ICFG [2022-10-16 05:15:38,112 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-16 05:15:38,588 INFO L276 CfgBuilder]: Performing block encoding [2022-10-16 05:15:38,601 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-16 05:15:38,601 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-10-16 05:15:38,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:15:38 BoogieIcfgContainer [2022-10-16 05:15:38,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-16 05:15:38,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-16 05:15:38,606 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-16 05:15:38,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-16 05:15:38,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 05:15:37" (1/3) ... [2022-10-16 05:15:38,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@657a5fdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:15:38, skipping insertion in model container [2022-10-16 05:15:38,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:15:37" (2/3) ... [2022-10-16 05:15:38,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@657a5fdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:15:38, skipping insertion in model container [2022-10-16 05:15:38,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:15:38" (3/3) ... [2022-10-16 05:15:38,614 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-2.i [2022-10-16 05:15:38,639 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-16 05:15:38,640 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-10-16 05:15:38,697 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-16 05:15:38,705 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;@1e2aed5f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-16 05:15:38,705 INFO L358 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2022-10-16 05:15:38,711 INFO L276 IsEmpty]: Start isEmpty. Operand has 83 states, 50 states have (on average 1.94) internal successors, (97), 78 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 05:15:38,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 05:15:38,718 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:15:38,719 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 05:15:38,720 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-16 05:15:38,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:15:38,726 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-10-16 05:15:38,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:15:38,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485786668] [2022-10-16 05:15:38,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:38,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:15:38,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:39,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:15:39,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:15:39,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485786668] [2022-10-16 05:15:39,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485786668] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:15:39,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:15:39,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:15:39,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994735758] [2022-10-16 05:15:39,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:15:39,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:15:39,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:15:39,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:15:39,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:15:39,115 INFO L87 Difference]: Start difference. First operand has 83 states, 50 states have (on average 1.94) internal successors, (97), 78 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:15:39,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:15:39,216 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2022-10-16 05:15:39,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:15:39,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-16 05:15:39,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:15:39,229 INFO L225 Difference]: With dead ends: 70 [2022-10-16 05:15:39,229 INFO L226 Difference]: Without dead ends: 68 [2022-10-16 05:15:39,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:15:39,235 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 63 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:15:39,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 60 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:15:39,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-10-16 05:15:39,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-10-16 05:15:39,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 49 states have (on average 1.489795918367347) internal successors, (73), 63 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 05:15:39,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2022-10-16 05:15:39,287 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 4 [2022-10-16 05:15:39,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:15:39,288 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2022-10-16 05:15:39,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:15:39,288 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2022-10-16 05:15:39,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 05:15:39,289 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:15:39,289 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 05:15:39,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-16 05:15:39,290 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-16 05:15:39,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:15:39,291 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-10-16 05:15:39,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:15:39,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925604566] [2022-10-16 05:15:39,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:39,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:15:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:39,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:15:39,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:15:39,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925604566] [2022-10-16 05:15:39,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925604566] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:15:39,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:15:39,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:15:39,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101860673] [2022-10-16 05:15:39,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:15:39,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:15:39,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:15:39,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:15:39,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:15:39,439 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:15:39,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:15:39,542 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2022-10-16 05:15:39,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:15:39,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-16 05:15:39,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:15:39,544 INFO L225 Difference]: With dead ends: 72 [2022-10-16 05:15:39,544 INFO L226 Difference]: Without dead ends: 72 [2022-10-16 05:15:39,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:15:39,547 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 2 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:15:39,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 123 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:15:39,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-10-16 05:15:39,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2022-10-16 05:15:39,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 65 states have internal predecessors, (75), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 05:15:39,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2022-10-16 05:15:39,559 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 4 [2022-10-16 05:15:39,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:15:39,560 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2022-10-16 05:15:39,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:15:39,560 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2022-10-16 05:15:39,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-16 05:15:39,561 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:15:39,561 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-10-16 05:15:39,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-16 05:15:39,562 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-16 05:15:39,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:15:39,563 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2022-10-16 05:15:39,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:15:39,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233656133] [2022-10-16 05:15:39,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:39,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:15:39,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:39,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:15:39,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:15:39,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233656133] [2022-10-16 05:15:39,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233656133] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:15:39,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653126831] [2022-10-16 05:15:39,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:39,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:15:39,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:15:39,795 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:15:39,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-16 05:15:39,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:39,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-16 05:15:39,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:15:39,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 05:15:40,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:15:40,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:15:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:15:40,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653126831] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:15:40,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:15:40,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-10-16 05:15:40,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75262490] [2022-10-16 05:15:40,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:15:40,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 05:15:40,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:15:40,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 05:15:40,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-16 05:15:40,195 INFO L87 Difference]: Start difference. First operand 70 states and 81 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) [2022-10-16 05:15:40,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:15:40,520 INFO L93 Difference]: Finished difference Result 188 states and 225 transitions. [2022-10-16 05:15:40,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 05:15:40,521 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 [2022-10-16 05:15:40,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:15:40,524 INFO L225 Difference]: With dead ends: 188 [2022-10-16 05:15:40,524 INFO L226 Difference]: Without dead ends: 188 [2022-10-16 05:15:40,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-10-16 05:15:40,526 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 185 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 05:15:40,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 253 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-16 05:15:40,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-10-16 05:15:40,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 82. [2022-10-16 05:15:40,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 63 states have (on average 1.4126984126984128) internal successors, (89), 77 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 05:15:40,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2022-10-16 05:15:40,542 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 8 [2022-10-16 05:15:40,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:15:40,543 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2022-10-16 05:15:40,543 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) [2022-10-16 05:15:40,543 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2022-10-16 05:15:40,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-16 05:15:40,544 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:15:40,544 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:15:40,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-16 05:15:40,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:15:40,759 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-16 05:15:40,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:15:40,761 INFO L85 PathProgramCache]: Analyzing trace with hash -169937429, now seen corresponding path program 1 times [2022-10-16 05:15:40,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:15:40,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756585496] [2022-10-16 05:15:40,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:40,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:15:40,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:40,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:15:40,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:15:40,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756585496] [2022-10-16 05:15:40,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756585496] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:15:40,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946001839] [2022-10-16 05:15:40,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:40,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:15:40,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:15:40,912 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:15:40,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-16 05:15:40,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:40,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-16 05:15:40,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:15:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:15:41,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:15:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:15:41,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946001839] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:15:41,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:15:41,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-10-16 05:15:41,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979037294] [2022-10-16 05:15:41,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:15:41,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-16 05:15:41,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:15:41,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-16 05:15:41,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-16 05:15:41,083 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:15:41,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:15:41,127 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2022-10-16 05:15:41,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 05:15:41,127 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-10-16 05:15:41,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:15:41,130 INFO L225 Difference]: With dead ends: 90 [2022-10-16 05:15:41,131 INFO L226 Difference]: Without dead ends: 90 [2022-10-16 05:15:41,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-16 05:15:41,134 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 30 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:15:41,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 225 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:15:41,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-10-16 05:15:41,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2022-10-16 05:15:41,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 70 states have (on average 1.3571428571428572) internal successors, (95), 84 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 05:15:41,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2022-10-16 05:15:41,162 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 15 [2022-10-16 05:15:41,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:15:41,164 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2022-10-16 05:15:41,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:15:41,164 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2022-10-16 05:15:41,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-16 05:15:41,168 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:15:41,168 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2022-10-16 05:15:41,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-16 05:15:41,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-10-16 05:15:41,378 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-16 05:15:41,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:15:41,380 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2022-10-16 05:15:41,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:15:41,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103455221] [2022-10-16 05:15:41,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:41,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:15:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:15:41,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:15:41,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103455221] [2022-10-16 05:15:41,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103455221] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:15:41,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553796551] [2022-10-16 05:15:41,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:15:41,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:15:41,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:15:41,766 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:15:41,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-16 05:15:41,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:15:41,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:15:41,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-16 05:15:41,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:15:41,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 05:15:42,058 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:15:42,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:15:42,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553796551] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:15:42,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:15:42,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2022-10-16 05:15:42,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730290211] [2022-10-16 05:15:42,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:15:42,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 05:15:42,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:15:42,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 05:15:42,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-10-16 05:15:42,061 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:15:42,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:15:42,159 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2022-10-16 05:15:42,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 05:15:42,160 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-10-16 05:15:42,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:15:42,162 INFO L225 Difference]: With dead ends: 88 [2022-10-16 05:15:42,162 INFO L226 Difference]: Without dead ends: 88 [2022-10-16 05:15:42,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-10-16 05:15:42,168 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 64 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:15:42,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 107 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:15:42,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-10-16 05:15:42,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-10-16 05:15:42,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 83 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 05:15:42,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2022-10-16 05:15:42,189 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 20 [2022-10-16 05:15:42,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:15:42,190 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2022-10-16 05:15:42,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:15:42,190 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2022-10-16 05:15:42,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-10-16 05:15:42,191 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:15:42,192 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:15:42,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-16 05:15:42,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:15:42,406 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-16 05:15:42,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:15:42,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1600163167, now seen corresponding path program 2 times [2022-10-16 05:15:42,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:15:42,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59970639] [2022-10-16 05:15:42,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:42,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:15:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:42,534 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:15:42,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:15:42,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59970639] [2022-10-16 05:15:42,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59970639] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:15:42,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027634584] [2022-10-16 05:15:42,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:15:42,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:15:42,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:15:42,536 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:15:42,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-16 05:15:42,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-16 05:15:42,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:15:42,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-16 05:15:42,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:15:42,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 05:15:42,736 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-10-16 05:15:42,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:15:42,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027634584] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:15:42,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:15:42,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2022-10-16 05:15:42,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979090656] [2022-10-16 05:15:42,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:15:42,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 05:15:42,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:15:42,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 05:15:42,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-10-16 05:15:42,739 INFO L87 Difference]: Start difference. First operand 88 states and 99 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:15:42,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:15:42,888 INFO L93 Difference]: Finished difference Result 131 states and 151 transitions. [2022-10-16 05:15:42,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 05:15:42,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-10-16 05:15:42,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:15:42,890 INFO L225 Difference]: With dead ends: 131 [2022-10-16 05:15:42,890 INFO L226 Difference]: Without dead ends: 131 [2022-10-16 05:15:42,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-10-16 05:15:42,891 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 114 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:15:42,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 108 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:15:42,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-10-16 05:15:42,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 119. [2022-10-16 05:15:42,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 99 states have (on average 1.3636363636363635) internal successors, (135), 112 states have internal predecessors, (135), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-16 05:15:42,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 145 transitions. [2022-10-16 05:15:42,899 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 145 transitions. Word has length 31 [2022-10-16 05:15:42,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:15:42,900 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 145 transitions. [2022-10-16 05:15:42,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:15:42,900 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 145 transitions. [2022-10-16 05:15:42,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-10-16 05:15:42,901 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:15:42,901 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:15:42,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-16 05:15:43,117 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 [2022-10-16 05:15:43,118 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-16 05:15:43,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:15:43,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1934549393, now seen corresponding path program 1 times [2022-10-16 05:15:43,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:15:43,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528270476] [2022-10-16 05:15:43,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:43,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:15:43,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-10-16 05:15:43,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:15:43,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528270476] [2022-10-16 05:15:43,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528270476] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:15:43,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826634332] [2022-10-16 05:15:43,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:43,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:15:43,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:15:43,284 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:15:43,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-16 05:15:43,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:43,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-16 05:15:43,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:15:43,432 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:15:43,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:15:43,573 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:15:43,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826634332] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:15:43,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:15:43,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2022-10-16 05:15:43,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686484181] [2022-10-16 05:15:43,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:15:43,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-10-16 05:15:43,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:15:43,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-10-16 05:15:43,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2022-10-16 05:15:43,577 INFO L87 Difference]: Start difference. First operand 119 states and 145 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:15:44,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:15:44,125 INFO L93 Difference]: Finished difference Result 199 states and 229 transitions. [2022-10-16 05:15:44,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-10-16 05:15:44,126 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-10-16 05:15:44,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:15:44,128 INFO L225 Difference]: With dead ends: 199 [2022-10-16 05:15:44,128 INFO L226 Difference]: Without dead ends: 199 [2022-10-16 05:15:44,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=421, Invalid=839, Unknown=0, NotChecked=0, Total=1260 [2022-10-16 05:15:44,130 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 355 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 05:15:44,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 305 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-16 05:15:44,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-10-16 05:15:44,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 157. [2022-10-16 05:15:44,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 137 states have (on average 1.2846715328467153) internal successors, (176), 150 states have internal predecessors, (176), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-16 05:15:44,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 186 transitions. [2022-10-16 05:15:44,138 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 186 transitions. Word has length 32 [2022-10-16 05:15:44,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:15:44,138 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 186 transitions. [2022-10-16 05:15:44,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:15:44,139 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 186 transitions. [2022-10-16 05:15:44,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-10-16 05:15:44,141 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:15:44,141 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:15:44,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-16 05:15:44,354 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 [2022-10-16 05:15:44,355 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-16 05:15:44,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:15:44,356 INFO L85 PathProgramCache]: Analyzing trace with hash -2033957782, now seen corresponding path program 1 times [2022-10-16 05:15:44,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:15:44,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341034509] [2022-10-16 05:15:44,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:44,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:15:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:44,776 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:15:44,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:15:44,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341034509] [2022-10-16 05:15:44,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341034509] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:15:44,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390995644] [2022-10-16 05:15:44,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:44,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:15:44,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:15:44,779 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:15:44,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-16 05:15:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:44,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-16 05:15:44,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:15:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:15:44,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:15:45,348 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:15:45,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390995644] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:15:45,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:15:45,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-10-16 05:15:45,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759120175] [2022-10-16 05:15:45,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:15:45,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-10-16 05:15:45,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:15:45,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-10-16 05:15:45,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-16 05:15:45,352 INFO L87 Difference]: Start difference. First operand 157 states and 186 transitions. Second operand has 33 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 33 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) [2022-10-16 05:15:45,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:15:45,481 INFO L93 Difference]: Finished difference Result 221 states and 250 transitions. [2022-10-16 05:15:45,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-10-16 05:15:45,482 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 33 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) Word has length 68 [2022-10-16 05:15:45,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:15:45,484 INFO L225 Difference]: With dead ends: 221 [2022-10-16 05:15:45,484 INFO L226 Difference]: Without dead ends: 221 [2022-10-16 05:15:45,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-16 05:15:45,486 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 135 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:15:45,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 249 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:15:45,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-10-16 05:15:45,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2022-10-16 05:15:45,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 201 states have (on average 1.1940298507462686) internal successors, (240), 214 states have internal predecessors, (240), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-16 05:15:45,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 250 transitions. [2022-10-16 05:15:45,511 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 250 transitions. Word has length 68 [2022-10-16 05:15:45,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:15:45,512 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 250 transitions. [2022-10-16 05:15:45,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 33 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) [2022-10-16 05:15:45,512 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 250 transitions. [2022-10-16 05:15:45,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-10-16 05:15:45,516 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:15:45,516 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:15:45,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-16 05:15:45,730 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 [2022-10-16 05:15:45,731 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-16 05:15:45,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:15:45,733 INFO L85 PathProgramCache]: Analyzing trace with hash 263149722, now seen corresponding path program 2 times [2022-10-16 05:15:45,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:15:45,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096124903] [2022-10-16 05:15:45,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:45,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:15:45,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:47,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:15:47,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:15:47,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096124903] [2022-10-16 05:15:47,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096124903] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:15:47,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744945022] [2022-10-16 05:15:47,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:15:47,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:15:47,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:15:47,262 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:15:47,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-16 05:15:47,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:15:47,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:15:47,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-16 05:15:47,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:15:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:15:47,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:15:48,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:15:48,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744945022] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:15:48,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:15:48,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-10-16 05:15:48,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851664886] [2022-10-16 05:15:48,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:15:48,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-10-16 05:15:48,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:15:48,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-10-16 05:15:48,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-16 05:15:48,980 INFO L87 Difference]: Start difference. First operand 221 states and 250 transitions. Second operand has 65 states, 65 states have (on average 3.9692307692307693) internal successors, (258), 65 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:15:49,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:15:49,302 INFO L93 Difference]: Finished difference Result 349 states and 378 transitions. [2022-10-16 05:15:49,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-10-16 05:15:49,309 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.9692307692307693) internal successors, (258), 65 states have internal predecessors, (258), 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 132 [2022-10-16 05:15:49,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:15:49,316 INFO L225 Difference]: With dead ends: 349 [2022-10-16 05:15:49,316 INFO L226 Difference]: Without dead ends: 349 [2022-10-16 05:15:49,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-16 05:15:49,324 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 279 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 05:15:49,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 497 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 05:15:49,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-10-16 05:15:49,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2022-10-16 05:15:49,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 329 states have (on average 1.1185410334346504) internal successors, (368), 342 states have internal predecessors, (368), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-16 05:15:49,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 378 transitions. [2022-10-16 05:15:49,335 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 378 transitions. Word has length 132 [2022-10-16 05:15:49,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:15:49,339 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 378 transitions. [2022-10-16 05:15:49,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.9692307692307693) internal successors, (258), 65 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:15:49,339 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 378 transitions. [2022-10-16 05:15:49,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-10-16 05:15:49,354 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:15:49,355 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:15:49,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-16 05:15:49,568 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 [2022-10-16 05:15:49,569 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-16 05:15:49,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:15:49,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1051131654, now seen corresponding path program 3 times [2022-10-16 05:15:49,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:15:49,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87890042] [2022-10-16 05:15:49,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:49,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:15:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:53,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7628 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:15:53,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:15:53,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87890042] [2022-10-16 05:15:53,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87890042] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:15:53,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511390815] [2022-10-16 05:15:53,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 05:15:53,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:15:53,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:15:53,955 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:15:53,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-16 05:15:54,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-16 05:15:54,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:15:54,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-16 05:15:54,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:15:54,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 05:15:55,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7628 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2022-10-16 05:15:55,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:15:55,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511390815] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:15:55,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:15:55,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [65] total 70 [2022-10-16 05:15:55,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803122391] [2022-10-16 05:15:55,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:15:55,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 05:15:55,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:15:55,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 05:15:55,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2097, Invalid=2733, Unknown=0, NotChecked=0, Total=4830 [2022-10-16 05:15:55,149 INFO L87 Difference]: Start difference. First operand 349 states and 378 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:15:55,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:15:55,374 INFO L93 Difference]: Finished difference Result 359 states and 389 transitions. [2022-10-16 05:15:55,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 05:15:55,375 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 260 [2022-10-16 05:15:55,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:15:55,377 INFO L225 Difference]: With dead ends: 359 [2022-10-16 05:15:55,377 INFO L226 Difference]: Without dead ends: 359 [2022-10-16 05:15:55,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2118, Invalid=3138, Unknown=0, NotChecked=0, Total=5256 [2022-10-16 05:15:55,380 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 225 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:15:55,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 70 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:15:55,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-10-16 05:15:55,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 350. [2022-10-16 05:15:55,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 330 states have (on average 1.1151515151515152) internal successors, (368), 343 states have internal predecessors, (368), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-16 05:15:55,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 378 transitions. [2022-10-16 05:15:55,390 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 378 transitions. Word has length 260 [2022-10-16 05:15:55,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:15:55,391 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 378 transitions. [2022-10-16 05:15:55,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:15:55,391 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 378 transitions. [2022-10-16 05:15:55,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-10-16 05:15:55,395 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:15:55,395 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:15:55,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-16 05:15:55,609 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 [2022-10-16 05:15:55,610 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-16 05:15:55,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:15:55,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1772808686, now seen corresponding path program 1 times [2022-10-16 05:15:55,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:15:55,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569052817] [2022-10-16 05:15:55,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:55,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:15:55,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:59,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7627 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 05:15:59,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:15:59,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569052817] [2022-10-16 05:15:59,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569052817] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:15:59,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044269328] [2022-10-16 05:15:59,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:15:59,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:15:59,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:15:59,604 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:15:59,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-16 05:15:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:15:59,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 935 conjuncts, 64 conjunts are in the unsatisfiable core [2022-10-16 05:15:59,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:16:00,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7627 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 05:16:00,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:16:05,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7627 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 05:16:05,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044269328] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:16:05,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:16:05,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 129 [2022-10-16 05:16:05,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144349059] [2022-10-16 05:16:05,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:16:05,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-10-16 05:16:05,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:16:05,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-10-16 05:16:05,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2022-10-16 05:16:05,571 INFO L87 Difference]: Start difference. First operand 350 states and 378 transitions. Second operand has 129 states, 129 states have (on average 4.0) internal successors, (516), 129 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:16:06,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:16:06,357 INFO L93 Difference]: Finished difference Result 606 states and 634 transitions. [2022-10-16 05:16:06,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-10-16 05:16:06,358 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 4.0) internal successors, (516), 129 states have internal predecessors, (516), 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 261 [2022-10-16 05:16:06,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:16:06,362 INFO L225 Difference]: With dead ends: 606 [2022-10-16 05:16:06,362 INFO L226 Difference]: Without dead ends: 606 [2022-10-16 05:16:06,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2022-10-16 05:16:06,369 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 378 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-16 05:16:06,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 921 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-16 05:16:06,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-10-16 05:16:06,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 606. [2022-10-16 05:16:06,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 586 states have (on average 1.0648464163822526) internal successors, (624), 599 states have internal predecessors, (624), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-16 05:16:06,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 634 transitions. [2022-10-16 05:16:06,384 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 634 transitions. Word has length 261 [2022-10-16 05:16:06,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:16:06,385 INFO L495 AbstractCegarLoop]: Abstraction has 606 states and 634 transitions. [2022-10-16 05:16:06,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 4.0) internal successors, (516), 129 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:16:06,386 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 634 transitions. [2022-10-16 05:16:06,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2022-10-16 05:16:06,396 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:16:06,397 INFO L195 NwaCegarLoop]: trace histogram [126, 126, 126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:16:06,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-16 05:16:06,597 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 [2022-10-16 05:16:06,598 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-16 05:16:06,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:16:06,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1959546578, now seen corresponding path program 2 times [2022-10-16 05:16:06,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:16:06,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097480657] [2022-10-16 05:16:06,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:16:06,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:16:06,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:16:21,435 INFO L134 CoverageAnalysis]: Checked inductivity of 31627 backedges. 0 proven. 31626 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 05:16:21,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:16:21,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097480657] [2022-10-16 05:16:21,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097480657] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:16:21,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932522680] [2022-10-16 05:16:21,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:16:21,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:16:21,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:16:21,437 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:16:21,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-16 05:16:21,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:16:21,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:16:21,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 1831 conjuncts, 128 conjunts are in the unsatisfiable core [2022-10-16 05:16:21,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:16:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 31627 backedges. 0 proven. 31626 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 05:16:22,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:16:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 31627 backedges. 0 proven. 31626 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 05:16:44,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932522680] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:16:44,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:16:44,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129, 129] total 257 [2022-10-16 05:16:44,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957560709] [2022-10-16 05:16:44,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:16:44,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 257 states [2022-10-16 05:16:44,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:16:44,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 257 interpolants. [2022-10-16 05:16:44,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32896, Invalid=32896, Unknown=0, NotChecked=0, Total=65792 [2022-10-16 05:16:44,909 INFO L87 Difference]: Start difference. First operand 606 states and 634 transitions. Second operand has 257 states, 257 states have (on average 4.0) internal successors, (1028), 257 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:16:47,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:16:47,912 INFO L93 Difference]: Finished difference Result 1118 states and 1146 transitions. [2022-10-16 05:16:47,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2022-10-16 05:16:47,914 INFO L78 Accepts]: Start accepts. Automaton has has 257 states, 257 states have (on average 4.0) internal successors, (1028), 257 states have internal predecessors, (1028), 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 517 [2022-10-16 05:16:47,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:16:47,920 INFO L225 Difference]: With dead ends: 1118 [2022-10-16 05:16:47,921 INFO L226 Difference]: Without dead ends: 1118 [2022-10-16 05:16:47,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1161 GetRequests, 906 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 28.7s TimeCoverageRelationStatistics Valid=32896, Invalid=32896, Unknown=0, NotChecked=0, Total=65792 [2022-10-16 05:16:47,928 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 1143 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1143 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-16 05:16:47,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1143 Valid, 617 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-16 05:16:47,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-10-16 05:16:47,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1118. [2022-10-16 05:16:47,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1098 states have (on average 1.034608378870674) internal successors, (1136), 1111 states have internal predecessors, (1136), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-16 05:16:47,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1146 transitions. [2022-10-16 05:16:47,954 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1146 transitions. Word has length 517 [2022-10-16 05:16:47,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:16:47,955 INFO L495 AbstractCegarLoop]: Abstraction has 1118 states and 1146 transitions. [2022-10-16 05:16:47,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 257 states, 257 states have (on average 4.0) internal successors, (1028), 257 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:16:47,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1146 transitions. [2022-10-16 05:16:48,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1030 [2022-10-16 05:16:48,001 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:16:48,002 INFO L195 NwaCegarLoop]: trace histogram [254, 254, 254, 254, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:16:48,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-16 05:16:48,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-10-16 05:16:48,216 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-16 05:16:48,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:16:48,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1207091282, now seen corresponding path program 3 times [2022-10-16 05:16:48,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:16:48,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470620150] [2022-10-16 05:16:48,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:16:48,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:16:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:17:50,664 INFO L134 CoverageAnalysis]: Checked inductivity of 128779 backedges. 0 proven. 128778 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 05:17:50,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:17:50,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470620150] [2022-10-16 05:17:50,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470620150] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:17:50,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343229862] [2022-10-16 05:17:50,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 05:17:50,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:17:50,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:17:50,673 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:17:50,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-16 05:17:50,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-16 05:17:50,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:17:50,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-16 05:17:50,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:17:51,352 INFO L134 CoverageAnalysis]: Checked inductivity of 128779 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 128778 trivial. 0 not checked. [2022-10-16 05:17:51,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:17:51,761 INFO L134 CoverageAnalysis]: Checked inductivity of 128779 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 128778 trivial. 0 not checked. [2022-10-16 05:17:51,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343229862] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:17:51,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:17:51,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [257, 5, 5] total 263 [2022-10-16 05:17:51,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063557738] [2022-10-16 05:17:51,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:17:51,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 263 states [2022-10-16 05:17:51,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:17:51,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 263 interpolants. [2022-10-16 05:17:51,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32915, Invalid=35991, Unknown=0, NotChecked=0, Total=68906 [2022-10-16 05:17:51,780 INFO L87 Difference]: Start difference. First operand 1118 states and 1146 transitions. Second operand has 263 states, 263 states have (on average 3.9961977186311786) internal successors, (1051), 263 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:18:28,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:18:28,857 INFO L93 Difference]: Finished difference Result 1208 states and 1244 transitions. [2022-10-16 05:18:28,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 266 states. [2022-10-16 05:18:28,858 INFO L78 Accepts]: Start accepts. Automaton has has 263 states, 263 states have (on average 3.9961977186311786) internal successors, (1051), 263 states have internal predecessors, (1051), 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 1029 [2022-10-16 05:18:28,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:18:28,866 INFO L225 Difference]: With dead ends: 1208 [2022-10-16 05:18:28,866 INFO L226 Difference]: Without dead ends: 1208 [2022-10-16 05:18:28,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2574 GetRequests, 2052 SyntacticMatches, 0 SemanticMatches, 522 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35713 ImplicationChecksByTransitivity, 61.6s TimeCoverageRelationStatistics Valid=99009, Invalid=175043, Unknown=0, NotChecked=0, Total=274052 [2022-10-16 05:18:28,886 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 2520 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2524 SdHoareTripleChecker+Valid, 954 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:18:28,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2524 Valid, 954 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-10-16 05:18:28,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2022-10-16 05:18:28,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1157. [2022-10-16 05:18:28,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1137 states have (on average 1.04221635883905) internal successors, (1185), 1150 states have internal predecessors, (1185), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-16 05:18:28,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 1195 transitions. [2022-10-16 05:18:28,911 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 1195 transitions. Word has length 1029 [2022-10-16 05:18:28,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:18:28,913 INFO L495 AbstractCegarLoop]: Abstraction has 1157 states and 1195 transitions. [2022-10-16 05:18:28,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 263 states, 263 states have (on average 3.9961977186311786) internal successors, (1051), 263 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:18:28,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 1195 transitions. [2022-10-16 05:18:28,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1034 [2022-10-16 05:18:28,925 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:18:28,925 INFO L195 NwaCegarLoop]: trace histogram [255, 255, 255, 255, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:18:28,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-10-16 05:18:29,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-16 05:18:29,140 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-16 05:18:29,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:18:29,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1444740303, now seen corresponding path program 1 times [2022-10-16 05:18:29,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:18:29,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197506621] [2022-10-16 05:18:29,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:18:29,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:18:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat